A porous transition metal cobalt electrode supported by foamed nickel, its preparation method and its application in electrocatalytic oxidation of sodium borohydride

A technology of transition metal and nickel foam, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of poor electrode conductivity and unstable structure, and achieve the effects of reducing electrode cost, stable electrode structure, and high catalyst utilization efficiency

Active Publication Date: 2021-04-06
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to provide a porous transition metal cobalt electrode supported by foamed nickel and its preparation method and its application in the electrocatalytic oxidation of sodium borohydride. Using silicon dioxide as a template, electrodeposition and "de-alloying" processes are used to prepare porous electrodes. Transition metal cobalt, as catalytic NaBH 4 The electro-oxidation material is used to improve the catalytic performance of transition metals, and overcomes the problems of poor electrode conductivity caused by organic binders and unstable structures during testing.

Method used

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  • A porous transition metal cobalt electrode supported by foamed nickel, its preparation method and its application in electrocatalytic oxidation of sodium borohydride
  • A porous transition metal cobalt electrode supported by foamed nickel, its preparation method and its application in electrocatalytic oxidation of sodium borohydride
  • A porous transition metal cobalt electrode supported by foamed nickel, its preparation method and its application in electrocatalytic oxidation of sodium borohydride

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Experimental program
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Effect test

Embodiment 1

[0025]The process of preparing a porous transition metal cobalt electrode supported by foamed nickel:

[0026](1) Take a piece of foam (1 cm × 1 cm) as a catalyst carrier;

[0027](2) Place foam as a working electrode, placed in 50 ml containing 0.10 mol·L-1 COSO4· 7h2O, 0.20mol·L-1 Hide3BO4, 3.43 mol·L-1 C2Hide5OH and 3.35 mmol·L-1In the aqueous solution of tetramethoxysilane, the hydrochloride electrode and the graphite rod are respectively used as the reference electrode and the pair of electrodes, respectively, the deposition time is 15 min, the deposition potential is -2 V, obtaining the CO of foam support SiO2Composite material;

[0028](3) CO-SIO supported by the prepared foam2The composite material is placed in a working electrode and placed in 1.0 mol·L.-1In the NaOH solution, the silver chloride electrode and the graphite rod are respectively used as the reference electrode and the counter electrode, and the circulation voltammetry is used (process parameters: the scan range is -0....

Embodiment 2

[0032]The process of preparing a porous transition metal cobalt electrode supported by foamed nickel:

[0033](1) Take a piece of foam (1 cm × 1 cm) as a catalyst carrier;

[0034](2) Place foam as a working electrode, placed in 50 ml containing 0.10 mol·L-1 COSO4· 7h2O, 0.20mol·L-1 Hide3BO4, 3.43 mol·L-1 C2Hide5OH and 3.35 mmol·L-1In the aqueous solution of tetramethoxysilane, the hydrochloride electrode and the graphite rod are respectively used as the reference electrode and the pair of electrodes, respectively, the deposition time is 15 min, the deposition potential is -2 V, obtaining the CO of foam support SiO2Composite material;

[0035](3) CO-SIO supported by the prepared foam2The composite material is placed in a working electrode and placed in 1.0 mol·L.-1In the NaOH solution, the silver chloride electrode and the graphite rod are respectively used as the reference electrode and the counter electrode, and the circulation voltammetry is used (process parameters: the scan range is -0....

Embodiment 3

[0038]The process of preparing a porous transition metal cobalt electrode supported by foamed nickel:

[0039](1) Take a piece of foam (1 cm × 1 cm) as a catalyst carrier;

[0040](2) Place foam as a working electrode, placed in 50 ml containing 0.10 mol·L-1 COSO4· 7h2O, 0.20mol·L-1 Hide3BO4, 3.43 mol·L-1 C2Hide5OH and 3.35 mmol·L-1In the aqueous solution of tetramethoxysilane, the hydrochloride electrode and the graphite rod are respectively used as the reference electrode and the pair of electrodes, respectively, the deposition time is 15 min, the deposition potential is -2 V, obtaining the CO of foam support SiO2Composite material;

[0041](3) CO-SIO supported by the prepared foam2The composite material is placed in a working electrode and placed in 1.0 mol·L.-1In the NaOH solution, the silver chloride electrode and the graphite rod are respectively used as the reference electrode and the counter electrode, and the circulation voltammetry is used (process parameters: the scan range is -0....

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Abstract

The invention discloses a porous transition metal cobalt electrode supported by foamed nickel, a preparation method thereof and an application in electrocatalytic oxidation of sodium borohydride. Preparation of porous transition metal cobalt as a high-performance catalyst for NaBH by electrodeposition and "dealloying" process 4 electrooxidation reaction. During the electrodeposition process, the transition metal cobalt and SiO 2 Form a composite, and then adopt the process of "de-alloying" to SiO 2 removal, forming porous cobalt with high specific surface area, for NaBH 4 Electrooxidation has superior catalytic activity. The present invention does not use noble metal materials, is cheap, and is beneficial to industrial application; solves the problem of NaBH 4 The high cost of electro-oxidation catalysts and the disadvantages of low catalytic activity of transition metal materials.

Description

Technical field[0001]The present invention relates to a porous transition metal cobalt electrode supported by foam and a preparation method thereof and an application in sodium borohydride, which belongs to the field of electrocatalytic oxidation.Background technique[0002]Direct Borohydride Fuel Cells, DBFC) is a fuel cell directly as a fuel as a fuel, which has a high power density and battery voltage, and clean and environmentally friendly. As a fuel, sodium borohydride (NABH) as a DBFC4) High hydrogen storage (10.6 wt.%) And specific capacity (5668 a · h · kg-1), In theory it fully electrodesize 8 electrons, see the formula:[0003][0004]NABH4Electroxidization properties are one of the important factors that determine DBFC performance. Catalyzed its electroolation catalysts mainly have noble metals (such as PT, PD, AU, etc.), transition metals (eg Ni, Co, Cu, etc.) and hydrogen storage alloys (such as AB)2Type, AB5Model, etc.), etc. The catalyst of precious metal catalysts is super...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90
CPCH01M4/8605H01M4/8652H01M4/8657H01M4/8853H01M4/9075Y02E60/50
Inventor 张栋铭张君君刘有智崔灿王浩宇程宇玲祁贵生焦纬洲袁志国
Owner ZHONGBEI UNIV
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