CN113036157B - Application of foamed nickel electrode - Google Patents

Application of foamed nickel electrode Download PDF

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CN113036157B
CN113036157B CN201911345686.7A CN201911345686A CN113036157B CN 113036157 B CN113036157 B CN 113036157B CN 201911345686 A CN201911345686 A CN 201911345686A CN 113036157 B CN113036157 B CN 113036157B
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electrode
sucrose
potential
nickel
agcl
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CN113036157A (en
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孙晶
曹厚勇
邱文
郎明非
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Dalian University
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Dalian University
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/8663—Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers
    • H01M4/8673—Electrically conductive fillers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/88—Processes of manufacture
    • H01M4/8825—Methods for deposition of the catalytic active composition
    • H01M4/8853—Electrodeposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/9041—Metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/90—Selection of catalytic material
    • H01M4/92—Metals of platinum group
    • H01M4/921—Alloys or mixtures with metallic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/16—Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

An application of a foam nickel electrode belongs to the field of fuel cells. The invention relates to an application of a PtNPs/CuNPs/foam nickel electrode as a working electrode, an Ag/AgCl electrode as a reference electrode and a platinum wire as an auxiliary electrode to form a three-electrode system, the three-electrode system is placed in a sucrose solution and a supporting electrolyte, the potential is set to be-0.2-1.3V, cyclic voltammetry curves of sucrose with the concentrations of 5mmol/L, 10mmol/L, 15mmol/L, 20mmol/L and 25mmol/L are recorded, and the control process of the electrode electrocatalytic oxidation sucrose solution is analyzed by using a standard curve method. The invention utilizes the good conductivity of the nickel foam to prepare the electrode with high sensitivity to the sucrose, and the electrode has the advantages of good catalytic effect, high sensitivity, good selectivity, stable structure and the like when the sucrose is used as a base liquid.

Description

Application of foamed nickel electrode
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to an application of a foamed nickel electrode.
Background
The glucose biofuel cell is a cell which can provide electric energy for human artificial organs and is invented by a research group of the university of Greenoble Joseph Fourier, and the first research group proves that the glucose biofuel cell can provide current for the artificial organs in human bodies through enzyme oxidation in vivo by implanting the glucose biofuel cell into mice, so that the idea that glucose can provide electric energy for implantable medical equipment is realized. Glucose biofuel cells rely on human enzymes to perform chemical reactions to produce electric current, such as: glucose and oxygen, both of which are present in the body of the experimental mouse, are combined, and this mixed substance called "redox mediator" is like a wire, and continuously supplies electricity to the artificial organ. Scientists are developing similar and diverse devices to generate electricity in an environmentally friendly manner. The biofuel cell has high requirements on the working environment and cannot work at high temperature.
Disclosure of Invention
The invention provides an application of a foamed nickel electrode aiming at the defects, and a fuel cell constructed by the foamed nickel electrode has lower requirement on the environment and can work at high temperature.
The invention solves the technical problem that the foam nickel electrode is a PtNPs/CuNPs/foam nickel electrode, the foam nickel of the electrode is a substrate and a conducting layer, the nano-copper platinum particles are electrochemical deposition layers, the nano-platinum particles are deposited on the nano-copper particles, and the nano-copper particles are deposited on the foam nickel.
The method for constructing the fuel cell by the PtNPs/CuNPs/foamed nickel electrode comprises the following steps: the method comprises the steps of taking a PtNPs/CuNPs/foam nickel electrode as a working electrode, an Ag/AgCl electrode as a reference electrode and a platinum wire as an auxiliary electrode to form a three-electrode system, placing the three-electrode system in a sucrose solution and a supporting electrolyte, setting the potential to be-0.2-1.3V, recording cyclic voltammetry curves of sucrose with the concentrations of 5mmol/L, 10mmol/L, 15mmol/L, 20mmol/L and 25mmol/L, and analyzing the control process of the electrode in the electrocatalytic oxidation of the sucrose solution by using a standard curve method.
Further, the supporting electrolyte is 1mol/LNaOH, and the pH is 14.
The principle is as follows: the foamed nickel electrode has the characteristics of good conductivity, unique open-cell structure, inherent tensile strength, thermal shock resistance and the like, so that more Cu ions can be deposited, and more platinum can be attached. When the electrode catalyzes sucrose, the contact area of the electrode on the sucrose is enlarged, so that the current of the electrode is increased, the output power of the current is also increased, and the electrode has high sensitivity on the sucrose. And when the sucrose is used as a reference solution, the good catalytic performance and high selectivity can be shown.
Has the beneficial effects that: the invention utilizes the good conductivity of the nickel foam to prepare the electrode with high sensitivity to the sucrose, and the electrode has the advantages of good catalytic effect, high sensitivity, good selectivity, stable structure and the like when the sucrose is used as a base liquid.
Drawings
FIG. 1 is a surface topography diagram of a nickel foam-based nano-copper/nano-platinum composite electrode.
FIG. 2 is a comparison of cyclic voltammograms of a sucrose solution and a blank solution.
FIG. 3 is a cyclic voltammogram of different concentrations of sucrose solution.
FIG. 4 is a standard curve of different concentrations of sucrose.
FIG. 5 is a PtNPs/CuNPs/foam nickel electrode anti-poisoning curve.
Detailed Description
The technical solutions of the present invention are further described below with reference to the drawings and the specific embodiments, but the present invention is not limited to the embodiments in any way. In the examples, unless otherwise specified, the experimental methods are all conventional methods; unless otherwise indicated, the experimental reagents and materials were commercially available.
The preparation method of the PtNPs/CuNPs/foamed nickel electrode of the following embodiment is as follows:
taking foamed nickel, washing with deionized water, and drying with nitrogen.
The electrode preparation method comprises the following specific steps:
(1) a three-electrode system is adopted, a foam nickel electrode is used as a working electrode, an Ag/AgCl electrode and a platinum wire electrode are used as reference electrodes and a counter electrode, and the three-electrode system is placed in an electrolytic cell filled with copper sulfate (1M) solution. Setting electrodeposition parameters of an electrochemical workstation by adopting a time current method: initial potential: -1.2V, deposition time 1600 s. And (5) carrying out nitrogen protection on the electrode after deposition, and standing for later use after one day.
Using a three-electrode system, copper/nickel foam glass with a nano-structure is immersed in K 2 PtCl 4 (5mmol/L) and 0.05mol/L potassium nitrate, a platinum electrode was used as the counter electrode and Ag/AgCl as the reference electrode. Setting electrodeposition parameters of an electrochemical workstation by adopting a conventional pulse voltammetry method: setting an initial voltage: -1.0V, end point potential: -0.3V, potential increment 0.05V, pulse width 50 s. And (5) carrying out nitrogen protection on the electrode after deposition, and standing for later use after two days.
As shown in figure 1, the surface topography of the nickel foam/nano copper platinum composite electrode is based on that the nano particles on the electrode are uniform in size and distribution, and the electrocatalysis performance is particularly outstanding.
Example 1 comparison of Cyclic voltammograms of sucrose solution and blank solution
Firstly, placing a three-electrode system in NaOH solution with the pH of 14 and the concentration of 1mol/L, scanning within a potential range of-0.2-1.3V by using a cyclic voltammetry method, and recording a cyclic voltammetry curve of a blank solution; then, the three-electrode system is placed in 25mmol/L sucrose solution to be detected containing 1mol/L NaOH solution with pH of 14 as supporting electrolyte, scanning is carried out in a potential range of-0.2-1V by using cyclic voltammetry, and a cyclic voltammetry curve of sucrose is recorded. As shown in fig. 2: the catalytic effect of the Pt-Ni electrode at 10mmol/L sucrose was tested at a scan rate of 100 mV/s. It can be seen from the figure that Pt-Ni electrodes are very active for sucrose catalysis. Shows that the fuel composed of the Pt-copper/foamed nickel electrode can convert the biological energy into the electric energy with high efficiency.
Example 2 cyclic voltammetry response of PtNPs/CuNPs/foamed nickel electrode to sucrose of the same concentration at different sweep rates a three-electrode system was placed in sucrose solutions to be measured of different concentrations containing 1mol/L NaOH solution with pH of 14 as supporting electrolyte in sequence, and scanning was performed within a potential range of-0.2 to 1.3V using cyclic voltammetry. Cyclic voltammograms of sucrose concentrations 5mmol/L, 10mmol/L, 15mmol/L, 20mmol/L, 25mmol/L were recorded and the control of the electro-catalytic oxidation of sucrose solutions by the electrodes was analysed using a standard curve method. As shown in the attached figures 3 and 4: as can be seen from the figure, with the increasing concentration, the oxidation current of the nano electrode in the sucrose solution is also increased continuously, the oxidation peak is also increased continuously, and a good linear response for catalyzing sucrose is presented, so that the oxidation-reduction reaction of sucrose can be proved to be controlled by diffusion. A good linear relation also exists between the two in the range of 5-25 mmol/L, and the linear regression equation of the sucrose oxidation peak current and the sucrose concentration is as follows: I-01436C +10.624 with a correlation coefficient of 0.9502.
EXAMPLE 3 determination of the antitoxic Capacity of the electrode
First, the three-electrode system was placed in a 10mm sucrose test solution containing 1mol/L KOH solution with pH 14 as a supporting electrolyte, and the time-current curve of sucrose was recorded at a potential of 0.65V by the time-current method. However, as shown in fig. 5, the current density drops sharply at the beginning. At the beginning of the reaction, it is a fast kinetic reaction, so the active site does not contain adsorbed sucrose molecules. The adsorption of new sucrose molecules then depends on the release of electrocatalytic sites by sucrose oxidation, or the occupation of electrode catalytically active sites by intermediate species like CO, CHx etc. formed in the first few minutes (rate determining step). Therefore, the slight decrease in current density is mainly due to the poisoning of the catalyst. Furthermore, the specific current experienced a rapid drop during the first 300 seconds throughout the test and was still a smooth and gentle change after the end of the test, with a decay of about 6%. Therefore, the electrode has strong anti-poisoning capacity and stable structure.
The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims (1)

1. The application of the foamed nickel electrode is characterized in that the application takes a PtNPs/CuNPs/foamed nickel electrode as a working electrode, an Ag/AgCl electrode as a reference electrode and a platinum wire as an auxiliary electrode to form a three-electrode system, the three-electrode system is placed in a sucrose solution and a supporting electrolyte, the set potential is-0.2-1.3V, cyclic voltammetry curves of sucrose with the concentrations of 5mmol/L, 10mmol/L, 15mmol/L, 20mmol/L and 25mmol/L are recorded, and the control process of the electrode electrocatalytic oxidation of the sucrose solution is analyzed by using a standard curve method; wherein the supporting electrolyte is 1mol/LNaOH and the pH is 14;
the electrode preparation method comprises the following specific steps:
(1) a three-electrode system is adopted, a foam nickel electrode is used as a working electrode, an Ag/AgCl electrode and a platinum wire electrode are used as reference electrodes and a counter electrode, the reference electrodes and the counter electrode are placed in an electrolytic cell filled with copper sulfate solution, and electrodeposition parameters of an electrochemical workstation are set by adopting a time current method: initial potential: the deposition time is 1600s, the electrode after deposition is protected by nitrogen, and the electrode is placed for standby after one day;
(2) adopting a three-electrode system, soaking copper/foam nickel glass with a nano structure into K of 5mmol/L 2 PtCl 4 And 0.05mol/L potassium nitrate, using a platinum electrode as a counter electrode and Ag/AgCl as a reference electrode, and using conventional pulse voltammetry, electrochemical workstation electrodeposition parameters were set: setting an initial voltage: -1.0V, end point potential: -0.3V, potential increment of 0.05V, pulse width of 50s, electrode nitrogen protection after deposition, and standing for two days for later use.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103877993A (en) * 2014-01-25 2014-06-25 陕西师范大学 Ultrathin metal layer catalyst and application thereof
CN104459170A (en) * 2014-09-26 2015-03-25 浙江工商大学 Sucrose concentration detection device and sucrose concentration detection method
CN109298053A (en) * 2018-10-23 2019-02-01 大连大学 A method of glucose is measured using AuNPs/AgNWs/PDMS ductile electrode
CN110148758A (en) * 2018-12-28 2019-08-20 广州钰芯传感科技有限公司 It is a kind of using carbohydrate as the porous gold electrode of fuel cell electro-catalysis and preparation method of raw material and its application in artificial intelligence sensor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103877993A (en) * 2014-01-25 2014-06-25 陕西师范大学 Ultrathin metal layer catalyst and application thereof
CN104459170A (en) * 2014-09-26 2015-03-25 浙江工商大学 Sucrose concentration detection device and sucrose concentration detection method
CN109298053A (en) * 2018-10-23 2019-02-01 大连大学 A method of glucose is measured using AuNPs/AgNWs/PDMS ductile electrode
CN110148758A (en) * 2018-12-28 2019-08-20 广州钰芯传感科技有限公司 It is a kind of using carbohydrate as the porous gold electrode of fuel cell electro-catalysis and preparation method of raw material and its application in artificial intelligence sensor

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