CN213304173U - Nickel carbide cathode capable of enhancing power generation and nickel carbide cathode microbial fuel cell reactor - Google Patents
Nickel carbide cathode capable of enhancing power generation and nickel carbide cathode microbial fuel cell reactor Download PDFInfo
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- CN213304173U CN213304173U CN202021573241.2U CN202021573241U CN213304173U CN 213304173 U CN213304173 U CN 213304173U CN 202021573241 U CN202021573241 U CN 202021573241U CN 213304173 U CN213304173 U CN 213304173U
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Abstract
The utility model relates to a nickel carbide cathode and nickel carbide cathode microbial fuel cell reactor capable of enhancing power generation. The nickel carbide cathode comprises a cathode body, and a nickel carbide catalyst layer and a carbon-based layer which are respectively loaded on two sides of the cathode body. The nickel carbide cathode capable of enhancing power generation provided by the utility model effectively improves the conductivity, increases the electrochemical active area, reduces the charge transfer internal resistance and has low cost by introducing the nickel carbide catalyst layer; the oxygen reduction performance of the cathode can be obviously improved, the power generation capacity is enhanced, and the operation is stable when the oxygen reduction catalyst is applied to a single-chamber microbial fuel cell reactor.
Description
Technical Field
The utility model belongs to the field of microbial electrochemistry, concretely relates to can strengthen nickel carbide negative pole and nickel carbide negative pole microbial fuel cell reactor of producing electricity.
Background
The social, environmental, economic and potential crisis created by the exploitation, manufacture and consumption of various fuels place an urgent need for the exploration of renewable energy sources to solve serious global energy problems. Microbial Fuel Cells (MFCs) have attracted much attention from both domestic and foreign researchers as a renewable and emerging Microbial electrochemical technology due to the generation of biological energy and the simultaneous treatment of wastewater. Although the organic medium is decomposed in the anode compartment, electron acceptors are present in the cathode, which determines the power output of the MFC. Of these media containing ferricyanide, permanganate, nitrate etc., oxygen is considered to be the most desirable acceptor because it has the advantages of low cost, high availability and high oxidation potential, so the efficiency of the oxygen reduction performance in the cathode affects the overall power output performance of the MFC.
In recent years, noble metals such as platinum, gold, palladium, and the like have improved efficiency of oxygen reduction performance as a cathode oxygen reduction catalyst of MFC due to excellent electrocatalytic performance and four-electron transfer route. In addition, these noble metals have hindered the development of MFC due to the disadvantages of high cost, scarcity, and susceptibility to corrosion over long term operation. Therefore, there is a need to develop some new and efficient oxygen reduction catalysts in MFC.
The main material currently used is carbon material (carbon paper, graphite or carbon cloth), but the effect is not ideal when these carbon materials are used directly. In order to obviously enhance the electrochemical performance of the cathode, a transition metal catalyst can be adopted to modify the cathode electrode, so that the performance of the cathode is further improved, and the output power of the microbial fuel cell reactor is improved. At present, due to the advantages of more active sites, large specific surface area, strong conductivity and the like, the transition metal carbonization catalyst can possibly replace expensive Pt/C to be used on a microbial fuel cell reactor. For example, patent CN 106784877A (publication date 20170531) discloses a TiO compound2The RGO cathode electrode has the advantages of large specific surface area, good conductivity and improved electron transfer efficiency. Thus, a method was developedAlternative Pt/C cathodes would greatly facilitate the development of MFC.
Disclosure of Invention
The utility model aims to overcome the defect that the pure carbon material catalytic effect is not good or not enough for the selection of the existing microbial fuel cell, and provide a nickel carbide cathode capable of enhancing the electricity generation. The nickel carbide cathode provided by the utility model effectively improves the conductivity, increases the electrochemical active area, reduces the charge transfer internal resistance and has low cost by introducing the nickel carbide catalyst layer; the oxygen reduction performance of the cathode can be obviously improved, the power generation capacity is enhanced, and the operation is stable when the oxygen reduction catalyst is applied to a single-chamber microbial fuel cell reactor.
Another object of the present invention is to provide a nickel carbide cathode microbial fuel cell reactor capable of enhancing power generation.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
a nickel carbide cathode capable of enhancing electricity generation comprises a cathode body, and a nickel carbide catalyst layer and a carbon-based layer which are respectively loaded on two sides of the cathode body.
The nickel carbide material has high oxygen reduction performance and large electrochemical active area, and the nickel carbide catalyst layer is introduced into the nickel carbide cathode, so that the conductivity can be effectively improved, the electrochemical active area is increased, the internal resistance of charge transfer is reduced, the oxygen reduction performance of the nickel carbide cathode is improved, and the cost is low; the oxygen reduction performance of the cathode can be obviously improved, the power generation capacity is enhanced, and the operation is stable when the oxygen reduction catalyst is applied to a single-chamber microbial fuel cell reactor.
Cathode bodies conventional in the art may be used in the present invention, such as cotton fabrics, carbon felts, carbon cloths, and the like. The carbon cloth has smaller internal resistance and good conductive capability, and is a high-quality carrier of the cathode electrode.
Preferably, the cathode body is a carbon cloth.
The carbon black material has better conductive capability, and the carbon black layer is taken as the carbon-based layer to enhance the conductive capability of the electrode, so that the oxygen reduction performance of the nickel carbide cathode is further improved.
Preferably, the carbon-based layer is a carbon black layer.
Preferably, the total thickness of the cathode is 0.18mm to 0.33 mm.
Preferably, the thickness of the cathode body is 0.05-0.08 mm.
Preferably, the thickness of the carbon-based layer is 0.08-0.15 mm.
Preferably, the thickness of the nickel carbide catalyst layer is 0.05-0.10 mm.
The nickel carbide material can be prepared by the following steps: mixing a melamine solution with the concentration of 0.015-0.025 mol/L, a formaldehyde solution with the concentration of 0.005-0.015 mol/L and a nickel acetate tetrahydrate solution with the concentration of 0.005-0.015 mol/L in a concentration ratio of 1-2: 1: 0.8-1, stirring for 10-20 min, heating for 16-20 h in a polytetrafluoroethylene reaction kettle at the temperature of 150-180 ℃, then washing for 3 times respectively with absolute ethyl alcohol and ultrapure water, heating for 20-30 h in a vacuum drying oven at the temperature of 55-65 ℃, and finally heating a sample for 1.8-2.2 h in a tubular furnace at the temperature of 800-1000 ℃ under the protection of nitrogen to obtain nickel carbide.
Taking the cathode body as carbon cloth and the carbon-based layer as carbon black layer as an example, the preparation process of the nickel carbide cathode is as follows.
(1) The nickel carbide is loaded on the carbon cloth to obtain the nickel carbide catalyst layer
Mixing ultrapure water and nickel carbide in a mixing ratio of: 0.8-0.9: 1 muL/mg, the mixing ratio of Nafion solution and nickel carbide is 6-8: 1 muL/mg, pure isopropanol and nickel carbide material are uniformly mixed in the mixing ratio of 3-4: 1 muL/mg, the mixed solution is uniformly coated on the surface of carbon cloth by using a conductive carbon brush, and the carbon cloth is dried for 36-48 hours at room temperature, so that the nickel carbide catalyst layer is obtained.
(2) Carbon black is loaded on the other side of the carbon cloth
Mixing polytetrafluoroethylene solution and carbon black in the following ratio: and 8-12, coating 1 mu L/mg of the carbon cloth on the other side of the carbon cloth electrode, and drying at room temperature for 18-24 hours to obtain the carbon base layer.
The utility model discloses still ask to protect a nickel carbide cathode microbiological fuel cell reactor that can strengthen and produce electricity, include above-mentioned nickel carbide cathode, anode chamber and locate anode electrode and proton exchange membrane in the anode chamber, the nickel carbide cathode locates outside the anode chamber, and the nickel carbide catalysis layer sets up with proton exchange membrane contact; the anode electrode and the nickel carbide cathode are oppositely arranged in parallel.
The nickel carbide cathode microbial fuel cell reactor is a single-chamber microbial fuel cell reactor, and the electricity generation and oxygen reduction processes are as follows: the electrochemical active bacteria on the anode electrode oxidize organic matters to generate electrons, protons and carbon dioxide, wherein the carbon dioxide is released to the outside of the single-chamber microbial fuel cell reactor, the electrons and the protons are respectively pumped to the cathode electrode through the circuit and the proton exchange membrane, and oxygen reduction reaction is carried out on oxygen in the air to generate bioelectricity.
Preferably, the anode chamber is provided with an anolyte vent sample port.
The anolyte ventilation sample injection port can be used for discharging carbon dioxide and adding anolyte or sampling.
Preferably, the anolyte vent sample port is arranged at the top of the anode chamber.
Preferably, an external resistor is connected in series between the anode electrode and the nickel carbide cathode, and a data collector is connected in parallel to the external resistor.
The anode electrode conventional in the art can be used in the present invention.
Preferably, the anode electrode is a graphite felt electrode.
Preferably, an anode reaction solution is injected into the anode chamber, and the anode reaction solution is a phosphate buffer solution of acetate.
Preferably, the distance from the anode electrode to the proton exchange membrane is 2/5 the entire width of the anode compartment.
Generally, the anode electrode sets up between two parties, and its distance to proton exchange membrane is 1/2 of whole anode chamber width, the utility model discloses an internal resistance when adjusting the position of anode electrode can reduce microbial fuel cell reactor operation, further improves its electrogenesis ability.
Preferably, the ratio of the area of the nickel carbide cathode electrode to the area of the anode electrode to the volume of the anode chamber is 18:175cm2/cm3。
Under the condition of the ratio, the power generation capacity of the microbial fuel cell reactor can be further improved.
Preferably, a stirring mechanism is further arranged in the anode chamber.
More preferably, the stirring mechanism is a magnetic stirrer.
More preferably, the stirring mechanism is arranged in the middle of the lower part of the anode chamber.
Compared with the prior art, the utility model discloses following beneficial effect has:
the nickel carbide cathode capable of enhancing power generation provided by the utility model effectively improves the conductivity, increases the electrochemical active area, reduces the charge transfer internal resistance and has low cost by introducing the nickel carbide catalyst layer; the oxygen reduction performance of the cathode can be obviously improved, the power generation capacity is enhanced, and the operation is stable when the oxygen reduction catalyst is applied to a single-chamber microbial fuel cell reactor.
Drawings
FIG. 1 is a schematic structural diagram of a single-chamber microbial fuel cell reactor provided in example 1;
FIG. 2 is a schematic structural diagram of a nickel carbide cathode capable of enhancing power generation provided in example 1;
FIG. 3 is Tafel plots of cathodes of nickel carbide-1, nickel carbide-2 and nickel carbide-4 in examples 1 to 3;
FIG. 4 is an electrochemical impedance diagram of cathodes of nickel carbide-1, nickel carbide-2 and nickel carbide-4 in examples 1 to 3.
FIG. 5 is a graph showing the power density of cathode MFCs of nickel carbide-1, nickel carbide-2, and nickel carbide-4 in examples 1 to 3.
Wherein, 1 is a magnetic stirrer; 2 is a proton exchange membrane; 3 is an anode electrode; 4 is an anode chamber; 5 is an anode liquid ventilation sample injection port; 6 is a data acquisition unit; 7 is a lead; 8 is a resistor; 9 is a nickel carbide cathode, 901 is a nickel carbide catalyst layer, 902 is a carbon cloth layer, and 903 is a carbon base layer.
Detailed Description
For a more detailed understanding of the principles of operation, specific objects, aspects and advantages of the present invention. The invention is further described by the following figures and specific examples in conjunction with the description. It should be understood that the specific method examples described below are only for illustrating the present invention and are not intended to be limiting. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
It will be understood that when an element is referred to as being "disposed on," "provided with," or "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Any modification, equivalent replacement, improvement and the like made on the basis of the utility model can be combined more and are included in the scope of the invention as long as the spirit and principle of the invention are within.
Example 1
Referring to fig. 1, the present embodiment provides a nickel carbide cathode microbial fuel cell reactor capable of enhancing power generation, which includes a stirring mechanism 1 (specifically, a magnetic stirrer), a proton exchange membrane 2, an anode electrode 3, an anode chamber 4, an anolyte aeration sample-injection port 5, a data collector 6, a lead 7, a resistor 8, and a nickel carbide cathode 9.
The anode electrode 3 and the proton exchange membrane 2 are arranged in the anode chamber, the inner side of the proton exchange membrane 2 is embedded into the side wall of the anode chamber, and the outer side of the proton exchange membrane 2 is positioned outside the anode chamber.
The magnetic stirrer is arranged in the middle of the lower part of the anode chamber 4, the anolyte ventilation sample injection port 5 is arranged in the middle of the top of the anode chamber 4 and is opposite to the magnetic stirrer, the anode electrode 3 is arranged at 2/5 (the distance from the anode electrode 3 to the proton exchange membrane 2 is 2/5 of the width of the whole anode chamber 4) of the anode chamber 4 close to the proton exchange membrane 2, the anode electrode 3 is connected with the cathode electrode 9 through an external resistor 8, the nickel carbide catalyst layer 901 on the cathode electrode 9 faces one side of the proton exchange membrane 2 and is arranged in a contact manner, and the data collector 6 monitors the voltage at two ends of the microbial fuel cell reactor in real.
The nickel carbide cathode 9 as a cathode electrode (denoted as nickel carbide-2, see fig. 2) includes a cathode body 902 (carbon cloth), a nickel carbide catalyst layer 901 supported on the cathode body 902, and a carbon-based layer (specifically, a carbon black layer) supported on the other side of the cathode body 902, the total thickness of the cathode electrode 9 is 0.26mm, the thickness of the nickel carbide layer is 0.075mm, and the thickness of the carbon-based layer is 0.12 mm.
The specific preparation process of the nickel carbide cathode 9 is as follows:
(1) preparing a nickel carbide material:
uniformly mixing a melamine solution containing 0.024mol/L, a formaldehyde solution containing 0.012mol/L and a nickel acetate solution containing 0.012mol/L in a volume ratio of 2:1:1, and stirring for 20min to form a uniform pink solution; heating the mixed solution in a polytetrafluoroethylene reaction kettle at 170 ℃ for 16h, respectively washing with absolute ethyl alcohol and ultrapure water for 3 times to remove impurities, and then drying the sample in a drying oven at 60 ℃ for 25 h; and then placing the dried sample in a vacuum tube furnace at 800 ℃ for further heating for 2.2 hours under the protection of nitrogen to prepare the required nickel carbide material.
(2) Preparing a nickel carbide catalyst layer:
mixing ultrapure water, Nafion solution and pure isopropanol solution with nickel carbide material at the ratio of 0.85:1 muL/mg, 6:1 muL/mg and 4:1 muL/mg respectively, then performing vortex oscillation for 30s to mix the materials uniformly, and then coating the mixed solution on the surface of carbon cloth by using a conductive carbon brush, wherein the coating weight is 2mg/cm2The thickness of the catalytic layer is 0.075mm, and finally the catalytic layer is dried for 48 hours at room temperature to obtain the nickel carbide catalytic layer.
(3) Preparing a cathode carbon base layer:
the mixing ratio of the polytetrafluoroethylene solution with the concentration of 40 percent and the carbon black is as follows: mixing at a ratio of 10:1 μ L/mg, vortexing for 30s to mix well, and coating the mixed solution on the other surface of the carbon cloth with a conductive carbon brush at a coating weight of 1.3mg/cm2And finally drying the carbon-based layer for 24 hours at room temperature to obtain the carbon-based layer, wherein the thickness of the carbon-based layer is 0.12mm, and the whole electrode is the nickel carbide-2 electrode.
Example 2
This example provides a nickel carbide cathode microbial fuel cell reactor (single-chamber microbial fuel cell reactor) capable of enhancing electricity generation, which has a structure identical to that of example 1 except that the nickel carbide cathode 9 is different.
In detail, in this embodiment, the nickel carbide cathode 9 (denoted as nickel carbide-4) includes a cathode body 902 (actually, carbon cloth), a nickel carbide catalyst layer 901 supported on a surface of the cathode body 902, and a carbon-based layer 903 (actually, carbon black layer) supported on the other surface of the cathode body 902, and the total thickness of the cathode 9 is 0.33mm, the thickness of the nickel carbide layer is 0.10mm, and the thickness of the carbon-based layer is 0.15 mm.
The specific preparation process of the nickel carbide cathode 9 is as follows:
(1) preparing a nickel carbide material:
uniformly mixing a melamine solution containing 0.015mol/L, a formaldehyde solution containing 0.010mol/L and a nickel acetate solution containing 0.008mol/L in a volume ratio of 1:1:0.9, and stirring for 10min to form a uniform pink solution; heating the mixed solution in a polytetrafluoroethylene reaction kettle at 180 ℃ for 18h, respectively washing with absolute ethyl alcohol and ultrapure water for 3 times to remove impurities, and then drying the sample in a drying oven at 55 ℃ for 20 h; and then placing the dried sample in a 1000 ℃ vacuum tube furnace for further heating for 2.0h under the protection of nitrogen to prepare the required sample.
(2) Preparing a nickel carbide catalyst layer:
mixing ultrapure water, Nafion solution and pure isopropanol solution with nickel carbide material at the ratio of 0.8:1 muL/mg, 7:1 muL/mg and 3:1 muL/mg respectively, then performing vortex oscillation for 30s to mix the materials uniformly, and then coating the mixed solution on the surface of carbon cloth by using a conductive carbon brush, wherein the coating weight is 4mg/cm2And finally drying the catalyst layer for 36 hours at room temperature to obtain the nickel carbide catalyst layer, wherein the thickness of the catalyst layer is 0.10 mm.
(3) Preparing a carbon base layer:
the mixing ratio of the polytetrafluoroethylene solution with the concentration of 40 percent and the carbon black is as follows: 12: 1uL/mg of the mixture is mixed, the mixture is evenly mixed by vortex oscillation for 30s, and then the mixed solution is coated on the other surface of the carbon cloth by using a conductive carbon brush, wherein the coating weight is 1.5mg/cm2The thickness of the carbon-based layer is 0.15mm, and finally the temperature is kept at room temperatureDrying for 18h to obtain the carbon-based layer, and finally obtaining the whole electrode, namely the nickel carbide-4 electrode.
Example 3
This example provides a nickel carbide cathode microbial fuel cell reactor (single-chamber microbial fuel cell reactor) capable of enhancing electricity generation, which has a structure identical to that of example 1 except that the nickel carbide cathode 9 is different.
In detail, in this embodiment, the nickel carbide cathode 9 (described as nickel carbide-1) includes a cathode body 902 (actually, a carbon cloth), a catalyst layer 901 (actually, a nickel carbide layer) supported on a surface of the cathode body 902, and a carbon-based layer 903 (actually, a carbon black layer) supported on the other surface of the cathode body 902, and the total thickness of the nickel carbide cathode 9 is 0.18mm, the thickness of the nickel carbide layer is 0.05mm, and the thickness of the carbon-based layer is 0.08 mm.
The specific preparation process of the nickel carbide cathode 9 is as follows:
(1) preparing a nickel carbide material:
uniformly mixing a melamine solution containing 0.015mol/L, a formaldehyde solution containing 0.015mol/L and a nickel acetate solution containing 0.0135mol/L in a volume ratio of 1.5:1:0.8, and stirring for 15min to form a uniform pink solution; heating the mixed solution in a polytetrafluoroethylene reaction kettle at 150 ℃ for 20h, respectively washing with absolute ethyl alcohol and ultrapure water for 3 times to remove impurities, and then drying the sample in a drying oven at 65 ℃ for 30 h; and then placing the dried sample in a 900 ℃ vacuum tube furnace for further heating for 1.8h under the protection of nitrogen to prepare the required sample.
(2) Preparing a nickel carbide catalyst layer:
mixing ultrapure water, Nafion solution and pure isopropanol solution with nickel carbide material at ratio of 0.9:1 muL/mg, 8:1 muL/mg and 3.5:1 muL/mg respectively, then performing vortex oscillation for 30s to mix the materials uniformly, and then coating the mixed solution on the surface of carbon cloth by using a conductive carbon brush, wherein the coating weight is 1mg/cm2And finally drying the catalyst layer for 43 hours at room temperature to obtain the nickel carbide catalyst layer, wherein the thickness of the catalyst layer is 0.05 mm.
(3) Preparing a carbon base layer:
mixing 40% concentration PTFE solution with carbon black in 8 parts1 mul/mg of the mixture, and evenly mixing the mixture by vortex oscillation for 30s, and then coating the mixed solution on the other surface of the carbon cloth by using a conductive carbon brush, wherein the coating weight is 1.0mg/cm2And finally, drying the carbon-based layer for 22 hours at room temperature to obtain the carbon-based layer, wherein the thickness of the carbon-based layer is 0.08mm, and finally the whole electrode is the nickel carbide-1 electrode.
Application performance test of nickel carbide cathode capable of enhancing electricity generation
1. Assembly and start-up of single-cell microbial fuel cell reactors
According to the structure diagram shown in fig. 1, a magnetic stirrer is placed in the middle of the bottom layer of the anode chamber, an anolyte vent sample injection port is positioned in the middle of the top layer of the anode chamber and is opposite to the magnetic stirrer, and an anode electrode is placed in the anode chamber (5 x 4cm) close to a proton exchange membrane 2/5; installing a nickel carbide catalyst layer facing one side of the proton exchange membrane, and connecting a cathode electrode with an anode electrode through an external resistor (1000 omega); the voltage across the microbial fuel cell reactor was measured in real time by a data collector (Keithley M2700, USA). Adding phosphate buffer solution containing 0.75g/L into the anode chamber, adding 5ml of electrogenic bacteria of an organism, introducing nitrogen into the anode chamber for 30min to remove oxygen in the solution, and starting the operation of the reactor.
2. Performance testing of cathode electrode and reactor of microbial fuel cell
The results of the Tafel curves for the cathode electrode tested by the electrochemical workstation are shown in fig. 3 and the results of the electrochemical impedance for the cathode electrode tested are shown in fig. 4. The results of testing the power density of the microbial fuel cell reactor by the variable external resistance method when the voltage output of the microbial fuel cell reactor reached the maximum value are shown in fig. 4.
Performance of the cathode electrode and the reactor of the microbial fuel cell:
tafel curves of different cathode electrodes were measured, and based on nickel carbide-1 (1mg/L), nickel carbide-2 (2mg/L) and nickel carbide-4 (4mg/L), as shown in FIG. 3, the maximum exchange current densities were 1.65X 10-4A/cm2、 2.18×10-4A/cm2And 2.34X 10-4A/cm2. It can be seen that the cathode electrodes of the various embodiments have a greater exchange current density at allThe maximum exchange current density in the examples was 2.34X 10-4A/cm2。
Electrochemical impedance curves of different cathode electrodes were measured, and the minimum internal resistances for charge transfer were 4.1. omega., 3.5. omega., and 2.2. omega., respectively, as shown in FIG. 4, based on nickel carbide-1 (1mg/L), nickel carbide-2 (2mg/L), and nickel carbide-4 (4 mg/L). It can be seen that the cathode electrodes of the respective embodiments have a small minimum internal charge transfer resistance, which is 2.2 Ω in all embodiments.
The power density curves of different microbial fuel cell reactors were measured, and the maximum power densities were 537.63mW/m based on nickel carbide-1 (1mg/L), nickel carbide-2 (2mg/L), and nickel carbide-4 (4mg/L) as shown in FIG. 52、913.01mW/m21421.4mW/m2. It can be seen that the cathode electrodes of the examples had a larger maximum power density, which was 1421.4mW/m in all examples2。
Therefore, the nickel carbide cathode provided by the utility model has the advantages of strong conductivity, large electrochemical active area and low charge transfer internal resistance; the utility model provides a can strengthen producing the cathodic microorganism fuel cell reactor of electricity, oxygen reduction performance is strong, and the product electric capacity is high, and moves stably.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (10)
1. A nickel carbide cathode capable of enhancing electricity generation is characterized by comprising a cathode body (902) and a nickel carbide catalytic layer (901) and a carbon-based layer (903) which are respectively loaded on two sides of the cathode body (902).
2. The nickel carbide cathode for enhanced electricity production according to claim 1, wherein the cathode body (902) is a carbon cloth; the carbon base layer (903) is a carbon black layer.
3. The nickel carbide cathode for enhanced electricity production according to claim 1, wherein the total thickness of the nickel carbide cathode is 0.18mm to 0.33 mm; the thickness of the cathode body (902) is 0.05-0.08 mm; the thickness of the carbon base layer (903) is 0.08-0.15 mm; the thickness of the nickel carbide catalyst layer (901) is 0.05-0.10 mm.
4. A nickel carbide cathode microbial fuel cell reactor capable of enhancing electricity generation is characterized by comprising the nickel carbide cathode (9) as claimed in any one of claims 1 to 3, an anode chamber (4), an anode electrode (3) arranged in the anode chamber (4) and a proton exchange membrane (2), wherein the nickel carbide cathode (9) is arranged outside the anode chamber (4), and a nickel carbide catalyst layer (901) is arranged in contact with the proton exchange membrane (2); the anode electrode (3) and the nickel carbide cathode (9) are arranged in parallel relatively.
5. The nickel carbide cathode microbial fuel cell reactor capable of enhancing power generation according to claim 4, wherein the anode chamber (4) is provided with an anolyte aeration sample port (5).
6. The nickel carbide cathode microbial fuel cell reactor capable of enhancing power generation as claimed in claim 4, wherein an external resistor (8) is connected in series between the anode electrode (3) and the nickel carbide cathode (9), and a data collector (6) is connected in parallel to the external resistor.
7. The nickel carbide cathode microbial fuel cell reactor capable of enhancing electricity production according to claim 4, wherein the anode electrode (3) is a graphite felt electrode.
8. The nickel carbide cathode microbial fuel cell reactor capable of enhancing power generation according to claim 4, wherein a stirring mechanism (1) is further arranged in the anode chamber.
9. The nickel carbide cathode microbial fuel cell reactor capable of enhancing the electricity production according to claim 4, wherein the distance from the anode electrode (3) to the proton exchange membrane (2) is 2/5 of the width of the whole anode chamber (4).
10. The nickel carbide cathode microbial fuel cell reactor capable of enhancing electricity production according to claim 4, wherein the ratio of the area of the nickel carbide cathode (9) to the volume of the anode chamber is 18:175cm2/cm3(ii) a The ratio of the area of the anode electrode (3) to the volume of the anode chamber is 18:175cm2/cm3。
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