CN108560017A - A kind of amorphous cobalt tungsten modifying foam nickel catalysis electrode, preparation method and applications - Google Patents
A kind of amorphous cobalt tungsten modifying foam nickel catalysis electrode, preparation method and applications Download PDFInfo
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- CN108560017A CN108560017A CN201711285066.XA CN201711285066A CN108560017A CN 108560017 A CN108560017 A CN 108560017A CN 201711285066 A CN201711285066 A CN 201711285066A CN 108560017 A CN108560017 A CN 108560017A
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
- C25B11/031—Porous electrodes
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The present invention relates to a kind of electro-deposition preparation methods of the foamed nickel catalyst electrode of amorphous cobalt tungsten modification, are mainly used for electrocatalytic decomposition elutriation hydrogen in neutral electrolyte.More specifically, the present invention deposits one layer of amorphous cobalt tungsten sedimentary by way of constant current electro-deposition using cobaltous sulfate and sodium tungstate respectively as cobalt source and tungsten source in foam nickel surface.This electrode in neutral electrolyte there is excellent electrocatalytic decomposition water Hydrogen Evolution Performance to reach 10mA/cm in 0.5~1.5mol/L PBS buffer solutions in (pH=7)2Current density needs 73mV overpotentials, reaches 20mA/cm2Current density needs 113mV overpotentials.The electrode production process is easy, and environmental-friendly, the electrode obtained can be directly used for electrolysis water, be suitable for industrialized production.Using neutral electrolyte, certain safety and environmental problem are avoided, has very important meaning in new energy and environmental science.
Description
Technical field
The present invention relates to a kind of electro-deposition preparation methods of the foamed nickel catalyst electrode of amorphous cobalt tungsten modification, are mainly used for
Electrocatalytic decomposition elutriation hydrogen in neutral electrolyte also has potential application performance in other energy developments and field of environment protection.
Background technology
Energy crisis and environmental pollution are the significant challenges of facing mankind, and the key for solving energy environment issues is to develop
Utilize renewable and clean energy resource.Hydrogen is abundant as one kind, purposes is wide and free of contamination high-grade energy, increasingly by people's
Pay attention to.Water electrolysis hydrogen production is a kind of most viable and most ripe technology for realizing extensive hydrogen manufacturing.In addition, with the big rule of solar energy
For generating electricity, the cost of water electrolysis hydrogen production will also decline to a great extent mould.Water electrolysis hydrogen production will develop to and convert solar energy into Hydrogen Energy
Technology.Therefore, water electrolysis hydrogen production is also following one of the core technology for realizing solar energy large scale storage, has very high society
It can benefit and economic benefit.The overpotential that water decomposition liberation of hydrogen can be reduced using elctro-catalyst, to improve energy conversion efficiency.
The best electrocatalytic decomposition elutriation hydrogen catalyst of performance is the noble metal catalyst using platinum as representative, expensive and resource at present
It is deficient.Developed base metal elctro-catalyst needs use in strong acid or strong alkaline electrolytes, this may bring one
Fixed safety and environmental problem, therefore a kind of high-performance electric catalyst that can be worked in neutral electrolyte of exploitation is with important
Scientific research value and realistic meaning.
The present invention prepares a kind of foamed nickel catalyst electrode of amorphous cobalt tungsten modification, electrode tool using the method for electro-deposition
Standby excellent electrocatalytic decomposition water Hydrogen Evolution Performance reaches -10mA/ in 0.5~1.5mol/L PBS buffer solutions (pH=7)
cm2Current density needs -73mV overpotentials, reaches -20mA/cm2Current density needs -113mV overpotentials.This electrode in the preparation,
Low in raw material price, preparation process is easy, environmental-friendly, has very important meaning in new energy and environmental science.
Invention content
The present invention is intended to provide a kind of electro-deposition preparation method of the foamed nickel catalyst electrode of amorphous cobalt tungsten modification and its
Using.The electrode production process is easy, and environmental-friendly, the electrode obtained can be directly used for electrolysis water, be suitable for industrialized production.It adopts
With neutral electrolyte, certain safety and environmental problem are avoided.
The present invention proposes a kind of amorphous cobalt tungsten modifying foam nickel catalysis electrode, using cobaltous sulfate and sodium tungstate respectively as
Cobalt source and tungsten source deposit one layer of amorphous cobalt tungsten sedimentary by the method for constant current electro-deposition in foam nickel surface；It is described
The electrocatalytic decomposition water Hydrogen Evolution Performance that electrode has in neutral electrolyte is as follows：In 0.5~1.5mol/L PBS buffer solutions
(pH=7) in, reach -10mA/cm2Current density is -73mV overpotentials, reaches -20mA/cm2Current density is -113mV excessively electric
Position.
The present invention also proposes a kind of preparation method of amorphous cobalt tungsten modifying foam nickel catalysis electrode, and steps are as follows：
(1) by 0.3~0.7g Cobalt monosulfate heptahydrates, 1.0~1.5g, tetra- tungstic acid hydrate sodium, 1.0~3.0g boric acid, 3.0~
9.0g sodium gluconates and 1.0~3.0g sodium chloride are dissolved in 30~90mL deionized waters and prepare electrodeposit liquid, and sodium hydroxide is added
Or it is 3~7 that the concentrated sulfuric acid, which adjusts pH,；
(2) nickel foam (removes surface oxidation in acetone (removing surface organic matter), 3~6mol/L hydrochloric acid solutions respectively successively
Layer), 10~15min of ultrasonic vibration is dried for standby with cleaning up in deionized water；
(3) using above-mentioned nickel foam as cathode, graphite rod as anode, use current density for -0.1~-0.5A/cm2
Constant current mode electro-deposition, sedimentation time be 0.5~2h, depositing temperature be 15~25 DEG C；
(4) by the nickel foam with deposition layer after being taken out in deposition liquid, deionized water and ethyl alcohol is used to rinse successively, often
Temperature is dried, and the foamed nickel catalyst electrode of amorphous cobalt tungsten modification is both obtained.
The application of amorphous cobalt tungsten modifying foam nickel catalysis electrode proposed by the present invention, it is electric mainly in neutral electrolyte
In terms of elutriation hydrogen is catalytically decomposed.
Above application method is as follows：Using 0.5~1.5mol/L PBS buffer solutions (pH=7) as electrolyte, with amorphous
State cobalt tungsten modifying foam nickel catalysis electrode is working electrode, silver/silver chloride electrode is reference electrode, graphite rod is to be surveyed to electrode
It is 15~25 DEG C to try temperature.In neutral electrolyte, which reaches -10mA/cm2Current density needs -73mV overpotentials, reaches
To -20mA/cm2Current density needs -113mV overpotentials.
Above-mentioned 0.5~1.5mol/L PBS buffer solutions (pH=7) preparation method is as follows：0.5~1.5mol/ is prepared respectively
L dipotassium hydrogen phosphate solutions and 0.5~1.5mol/L potassium dihydrogen phosphates monitor the pH of dipotassium hydrogen phosphate solution by pH meter
Potassium dihydrogen phosphate is slowly dropped in dipotassium hydrogen phosphate solution until pH is equal to 7 by value.
The invention has the advantages that：Low in raw material price, preparation process is easy, and environmental-friendly, the electrode obtained can be direct
For electrolysis water, it is suitable for industrialized production.Using neutral electrolyte, certain safety and environmental problem are avoided.
Description of the drawings
Fig. 1 is the scanning electron microscope (SEM) photograph of the amorphous cobalt tungsten modifying foam nickel catalysis electrode prepared by embodiment 1；
Fig. 2 is the transmission electron microscope picture of the amorphous cobalt tungsten sedimentary prepared by embodiment 1；
Fig. 3 is the selective electron diffraction figure of the amorphous cobalt tungsten sedimentary prepared by embodiment 1；
Fig. 4 is the X ray diffracting spectrum of the amorphous cobalt tungsten modifying foam nickel catalysis electrode prepared by embodiment 1；
Fig. 5 is the x-ray photoelectron spectroscopy of the amorphous cobalt tungsten modifying foam nickel catalysis electrode prepared by embodiment 1；
Fig. 6 be prepared by embodiment 1 be working electrode in neutral electricity using amorphous cobalt tungsten modifying foam nickel catalysis electrode
Solve the liberation of hydrogen linear scan curve in liquid；
Fig. 7 be prepared by embodiment 1 be working electrode in neutral electricity using amorphous cobalt tungsten modifying foam nickel catalysis electrode
It is -20mA/cm to solve current density in liquid2When constant current curve.
Specific implementation mode
In the following, in conjunction with the accompanying drawings and embodiments, specific embodiments of the present invention are further described in detail, but do not answer
It is limited the scope of the invention with this.
" range " disclosed herein is in the form of lower and upper limit.Can be respectively one or more lower limits and one
Or multiple upper limits.Given range is defined by selecting a lower limit and a upper limit.Selected lower and upper limit limit
The boundary of special range is determined.All ranges that can be defined in this way comprising and can combine, i.e., any lower limit
It can combine to form a range with any upper limit.For example, the range of 60-120 and 80-110 are listed for special parameter, reason
Solution is that the range of 60-110 and 80-120 is also to expect.In addition, if the minimum zone value 1 and 2 listed, and if list
Maximum magnitude 3,4 and 5, then below range can all expect：1-2,1-4,1-5,2-3,2-4 and 2-5.
In the present invention, unless otherwise indicated, numberical range " a-b " indicates the breviary of the arbitrary real combinings between a to b
It indicates, wherein a and b are real numbers.Such as numberical range " 0-5 " indicate all to have listed herein it is complete between " 0-5 "
Portion's real number, " 0-5 " are that the breviary of these combinations of values indicates.
In the present invention, if without particularly illustrating, all embodiments mentioned in this article and preferred implementation side
Formula can be combined with each other to form new technical solution.
In the present invention, if without particularly illustrating, all technical characteristics and preferred feature mentioned in this article can
New technical solution is formed to be combined with each other.
The preferred implementation method of the present invention is specifically described below in conjunction with specific embodiment, but it is to be understood that ability
Field technique personnel can reasonably become these embodiments under the premise of without departing substantially from the range of claims limited
Change, improve and be combined with each other, to obtain new specific implementation method, these pass through variation, improvement and are combined with each other acquisition
New specific implementation mode is also included within protection scope of the present invention.
Embodiment 1
Step 1: the preparation of amorphous cobalt tungsten modifying foam nickel catalysis electrode
By 0.562g Cobalt monosulfate heptahydrates, tetra- tungstic acid hydrate sodium of 1.319g, 2.4g boric acid, 6.6g sodium gluconates and 1.8g
Sodium chloride is dissolved in 60mL deionized waters and prepares electrodeposit liquid, and it is 6 that sodium hydroxide or concentrated sulfuric acid adjusting pH, which is added,；
Nickel foam successively respectively acetone (remove surface organic matter), 4mol/L hydrochloric acid solutions (removing surface oxide layer), go from
10~15min of ultrasonic vibration is dried for standby with cleaning up in sub- water；
Using above-mentioned nickel foam as cathode, graphite rod as anode, use current density for -0.33A/cm2Constant current
Mode electro-deposition, sedimentation time 1h, depositing temperature are 15~25 DEG C；
By the nickel foam with deposition layer after being taken out in deposition liquid, deionized water and ethyl alcohol is used to rinse successively, room temperature
It dries, both obtains the foamed nickel catalyst electrode of amorphous cobalt tungsten modification.
Step 2: performance characterization is tested
Pass through CHI660E electrochemical workstations, standard three electrode system, with amorphous cobalt tungsten modifying foam nickel catalysis electrode
It being used as to electrode as reference electrode, graphite rod as working electrode, silver/silver chloride electrode, test temperature is room temperature, with
1.0mol/L PBS buffer solutions (pH=7) are used as electrolyte, and electrolysis water Hydrogen Evolution Performance test is carried out using conventional method.
Above-mentioned 1.0mol/L PBS buffer solutions (pH=7) preparation method is as follows：1.0mol/L phosphoric acid hydrogen two is prepared respectively
Potassium solution and 1.0mol/L potassium dihydrogen phosphates monitor the pH value of dipotassium hydrogen phosphate solution by pH meter, by potassium dihydrogen phosphate
Solution is slowly dropped in dipotassium hydrogen phosphate solution until pH value is equal to 7.
Fig. 1 is the scanning electron microscope (SEM) photograph of the amorphous cobalt tungsten modifying foam nickel catalysis electrode prepared by embodiment 1, it can be seen that
Deposition layer is obviously carried on foam nickel surface.
Fig. 2 is the transmission electron microscope picture for the amorphous cobalt tungsten sedimentary that ultrasound is got off in slave nickel foam prepared by embodiment 1.
Without apparent lattice line in high power transmission electron microscope picture, illustrate that deposition layer is undefined structure.
Fig. 3 is that the Selected area electron for the amorphous cobalt tungsten sedimentary that ultrasound is got off in slave nickel foam prepared by embodiment 1 spreads out
Penetrate figure.The diffraction pattern is the ring-type of disperse, illustrates that deposition layer is undefined structure.
Fig. 4 is the X ray diffracting spectrum of the amorphous cobalt tungsten modifying foam nickel catalysis electrode prepared by embodiment 1.Collection of illustrative plates
In other than three diffraction maximums of nickel foam without other diffraction maximums, illustrate that deposition layer is undefined structure.
Fig. 5 is the x-ray photoelectron spectroscopy of the amorphous cobalt tungsten modifying foam nickel catalysis electrode prepared by embodiment 1.Co
2p collection of illustrative plates proves that the cobalt in deposition layer is mainly Co2+, separately there is a small amount of Co0；W 4f collection of illustrative plates proves that the tungsten in deposition layer is main
It is W6+, separately there is a small amount of W0；O 1s collection of illustrative plates proves that oxygen mainly exists in the form of-OH groups.
Fig. 6 is liberation of hydrogen of the amorphous cobalt tungsten modifying foam nickel catalysis electrode in neutral electrolyte prepared by embodiment 1
Linear scan curve.Wherein：Curve 1 is using the amorphous cobalt tungsten modifying foam nickel catalysis electrode prepared by embodiment 1 as work
Electrode, silver/silver chloride electrode are reference electrode, graphite rod is to electrode, and 1.0mol/LPBS buffer solutions are electrolyte, test
Temperature is room temperature, and sweep speed is the linear scan curve under 50mV/s test conditions.Curve 2 is to load quotient in contrast experiment
With the nickel foam of Pt/C be working electrode, silver/silver chloride electrode is reference electrode, graphite rod is to electrode, 1.0mol/L PBS
Buffer solution is electrolyte, and test temperature is room temperature, and sweep speed is the linear scan curve under 50mV/s test conditions.Curve
3 be using the blank nickel foam cleaned in contrast experiment as working electrode, silver/silver chloride electrode be reference electrode, graphite rod is pair
Electrode, 1.0mol/L PBS buffer solutions are electrolyte, and test temperature is room temperature, and sweep speed is under 50mV/s test conditions
Linear scan curve.As can be seen from Figure 6, in neutral electrolyte, the nickel foam of amorphous cobalt tungsten modification is in entire test voltage model
In enclosing, electrocatalytic decomposition elutriation hydrogen activity reaches -10mA/cm better than the nickel foam and blank nickel foam of Pt/C loads2Electricity
Current density needs -73mV overpotentials, reaches -20mA/cm2Current density needs -113mV overpotentials.
Fig. 7 be prepared by embodiment 1 be working electrode in neutral electricity using amorphous cobalt tungsten modifying foam nickel catalysis electrode
It is -20mA/cm to solve current density in liquid2When constant current curve.Test condition：With the amorphous cobalt tungsten prepared by embodiment 1
Modifying foam nickel catalysis electrode is working electrode, silver/silver chloride electrode is reference electrode, graphite rod is to electrode, 1.0mol/L
PBS buffer solutions are electrolyte, and test temperature is room temperature, and follow current density is -20mA/cm2, the duration is 24 hours.
As can be seen from Figure 7, the amorphous cobalt tungsten modifying foam nickel catalysis electrode prepared by embodiment 1 is -20mA/cm in current density2Under
Constant current continued electrolysis 24 hours, overpotential of hydrogen evolution maintain -110mV or so without apparent decline, it was demonstrated that prepared by embodiment 1
Amorphous cobalt tungsten modifying foam nickel catalysis electrode has preferable stability.
Embodiment 2
Step 1: the preparation of amorphous cobalt tungsten modifying foam nickel catalysis electrode
By 0.3g Cobalt monosulfate heptahydrates, tetra- tungstic acid hydrate sodium of 1.1g, 1.5g boric acid, 3.2g sodium gluconates and 1.2g chlorinations
Sodium is dissolved in 30mL deionized waters and prepares electrodeposit liquid, and it is 4 that sodium hydroxide or concentrated sulfuric acid adjusting pH, which is added,；
Nickel foam successively respectively acetone (remove surface organic matter), 3mol/L hydrochloric acid solutions (removing surface oxide layer), go from
10~15min of ultrasonic vibration is dried for standby with cleaning up in sub- water；
Using above-mentioned nickel foam as cathode, graphite rod as anode, use current density for -0.2A/cm2Constant current side
Formula electro-deposition, sedimentation time 0.5h, depositing temperature are 15~25 DEG C；
By the nickel foam with deposition layer after being taken out in deposition liquid, deionized water and ethyl alcohol is used to rinse successively, room temperature
It dries, both obtains the foamed nickel catalyst electrode of amorphous cobalt tungsten modification.
Step 2: performance characterization is tested
Pass through CHI660E electrochemical workstations, standard three electrode system, with amorphous cobalt tungsten modifying foam nickel catalysis electrode
It being used as to electrode as reference electrode, graphite rod as working electrode, silver/silver chloride electrode, test temperature is room temperature, with
0.5mol/L PBS buffer solutions (pH=7) are used as electrolyte, and electrolysis water Hydrogen Evolution Performance test is carried out using conventional method.
Above-mentioned 0.5mol/L PBS buffer solutions (pH=7) preparation method is as follows：0.5mol/L phosphoric acid hydrogen two is prepared respectively
Potassium solution and 0.5mol/L potassium dihydrogen phosphates monitor the pH value of dipotassium hydrogen phosphate solution by pH meter, by potassium dihydrogen phosphate
Solution is slowly dropped in dipotassium hydrogen phosphate solution until pH value is equal to 7.
Embodiment 3
Step 1: the preparation of amorphous cobalt tungsten modifying foam nickel catalysis electrode
By 0.7g Cobalt monosulfate heptahydrates, tetra- tungstic acid hydrate sodium of 1.5g, 2.8g boric acid, 8.9g sodium gluconates and 3.0g chlorinations
Sodium is dissolved in 90mL deionized waters and prepares electrodeposit liquid, and it is 7 that sodium hydroxide or concentrated sulfuric acid adjusting pH value, which is added,；
Nickel foam successively respectively acetone (remove surface organic matter), 6mol/L hydrochloric acid solutions (removing surface oxide layer), go from
10~15min of ultrasonic vibration is dried for standby with cleaning up in sub- water；
Using above-mentioned nickel foam as cathode, graphite rod as anode, use current density for -0.5A/cm2Constant current side
Formula electro-deposition, sedimentation time 2h, depositing temperature are 15~25 DEG C；
By the nickel foam with deposition layer after being taken out in deposition liquid, deionized water and ethyl alcohol is used to rinse successively, room temperature
It dries, both obtains the foamed nickel catalyst electrode of amorphous cobalt tungsten modification.
Step 2: performance characterization is tested
Pass through CHI660E electrochemical workstations, standard three electrode system, with amorphous cobalt tungsten modifying foam nickel catalysis electrode
It being used as to electrode as reference electrode, graphite rod as working electrode, silver/silver chloride electrode, test temperature is room temperature, with
1.5mol/L PBS buffer solutions (pH=7) are used as electrolyte, and electrolysis water Hydrogen Evolution Performance test is carried out using conventional method.
Above-mentioned 1.5mol/L PBS buffer solutions (pH=7) preparation method is as follows：1.5mol/L phosphoric acid hydrogen two is prepared respectively
Potassium solution and 1.5mol/L potassium dihydrogen phosphates monitor the pH value of dipotassium hydrogen phosphate solution by pH meter, by potassium dihydrogen phosphate
Solution is slowly dropped in dipotassium hydrogen phosphate solution until pH value is equal to 7.
Claims (5)
1. a kind of amorphous cobalt tungsten modifying foam nickel catalysis electrode, using cobaltous sulfate and sodium tungstate respectively as cobalt source and tungsten source,
By the method for constant current electro-deposition one layer of amorphous cobalt tungsten sedimentary is deposited in foam nickel surface；The electrode is in neutral electricity
The electrocatalytic decomposition water Hydrogen Evolution Performance having in solution liquid is as follows：In 0.5~1.5mol/L PBS buffer solutions (pH=7), reach
To -10mA/cm2Current density is -73mV overpotentials, reaches -20mA/cm2Current density is -113mV overpotentials.
2. a kind of preparation method of amorphous cobalt tungsten modifying foam nickel catalysis electrode, which is characterized in that steps are as follows：
(1) by 0.3~0.7g Cobalt monosulfate heptahydrates, 1.0~1.5g, tetra- tungstic acid hydrate sodium, 1.0~3.0g boric acid, 3.0~9.0g
Sodium gluconate and 1.0~3.0g sodium chloride are dissolved in 30~90mL deionized waters and prepare electrodeposit liquid, and sodium hydroxide or dense is added
Sulphur acid for adjusting pH is 3~7；
(2) nickel foam successively respectively in acetone (remove surface organic matter), 3~6mol/L hydrochloric acid solutions (removing surface oxide layer), go
10~15min of ultrasonic vibration is dried for standby with cleaning up in ionized water；
(3) using above-mentioned nickel foam as cathode, graphite rod as anode, use current density for -0.1~-0.5A/cm2Perseverance electricity
Stream mode electro-deposition, sedimentation time are 0.5~2h, and depositing temperature is 15~25 DEG C；
(4) by the nickel foam with deposition layer after being taken out in deposition liquid, deionized water and ethyl alcohol is used to rinse successively, room temperature dries in the air
It is dry, both obtain the foamed nickel catalyst electrode of amorphous cobalt tungsten modification.
3. the application of the foamed nickel catalyst electrode of amorphous cobalt tungsten modification according to claim 1, which is characterized in that amorphous state
The foamed nickel catalyst electrode of cobalt tungsten modification is for the electrocatalytic decomposition water evolving hydrogen reaction in neutral electrolyte.
4. application according to claim 1, which is characterized in that application process is as follows：It is buffered with 0.5~1.5mol/L PBS
Solution (pH=7) is used as electrolyte, using load the nickel foam of unformed cobalt tungsten bimetallic hydroxide as working electrode,
Silver/silver chloride electrode is used as reference electrode, graphite rod to electrode, and test temperature is 15~25 DEG C；In neutral electrolyte,
Reach -10mA/cm2Current density needs -73mV overpotentials, reaches -20mA/cm2Current density needs -113mV overpotentials.
5. application according to claim 4, which is characterized in that 0.5~1.5mol/L PBS buffer solutions (pH=7) are prepared
Method is as follows：0.5~1.5mol/L dipotassium hydrogen phosphate solutions and 0.5~1.5mol/L potassium dihydrogen phosphates are prepared respectively, are led to
Cross pH meter monitoring dipotassium hydrogen phosphate solution pH value, by potassium dihydrogen phosphate be slowly dropped in dipotassium hydrogen phosphate solution until
Until pH value is equal to 7.
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| CN109797404A (en) * | 2019-01-26 | 2019-05-24 | 南开大学 | The binary metal phosphide and preparation method and application of molybdenum trioxide (tungsten) regulation |
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| CN114086209A (en) * | 2021-12-09 | 2022-02-25 | 太原理工大学 | Ni easy to oxidize2+NiFeO (R) ofxHyPreparation and application of oxygen evolution catalyst |
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| CN109797404A (en) * | 2019-01-26 | 2019-05-24 | 南开大学 | The binary metal phosphide and preparation method and application of molybdenum trioxide (tungsten) regulation |
| CN111790453A (en) * | 2019-04-08 | 2020-10-20 | 湖北大学 | Cobalt/tungsten bimetallic organic frame cathode hydrogen evolution composite material and preparation method thereof |
| CN111841589A (en) * | 2020-07-29 | 2020-10-30 | 浙江理工大学 | Nickel-cobalt-tungsten phosphide catalyst and preparation method and application thereof |
| CN111841589B (en) * | 2020-07-29 | 2023-07-25 | 浙江理工大学 | Nickel-cobalt-tungsten phosphide catalyst and preparation method and application thereof |
| CN114525534A (en) * | 2020-11-20 | 2022-05-24 | 中国科学院大连化学物理研究所 | Active electrolytic water electrode and preparation method and application thereof |
| CN114086209A (en) * | 2021-12-09 | 2022-02-25 | 太原理工大学 | Ni easy to oxidize2+NiFeO (R) ofxHyPreparation and application of oxygen evolution catalyst |
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