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Cobalt-vanadium-based self-supporting electrode and preparation method and application thereof

A self-supporting electrode, cobalt vanadium-based technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of limited application, high cost, etc., achieve excellent stability, reduce cost, and enrich the effect of catalytic sites

Active Publication Date: 2022-04-12
HEILONGJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The best hydrogen evolution performance is still the platinum group noble metal catalyst, but the high cost limits its industrial application

Method used

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  • Cobalt-vanadium-based self-supporting electrode and preparation method and application thereof
  • Cobalt-vanadium-based self-supporting electrode and preparation method and application thereof
  • Cobalt-vanadium-based self-supporting electrode and preparation method and application thereof

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Embodiment 1

[0031] The present embodiment adopts cobalt chloride and ammonium metavanadate as cobalt source and vanadium source respectively, and concrete operation process is as follows:

[0032] (1) Pretreatment of nickel foam:

[0033] Sonicate the cut 3*4cm foam nickel in 50ml of acetone for 20min to remove the organic coating on the surface; then sonicate in 20ml of hydrochloric acid with a concentration of 2mol / L for 3min to remove the oxide layer; finally sonicate in 50ml of deionized water Until the pH is neutral, dry at 60°C for later use.

[0034] (2) Synthesis of coral-like nanoarray precursors on the surface of nickel foam by hydrothermal method:

[0035] Dissolve 0.114g cobalt chloride and 0.225g ammonium metavanadate in 60ml deionized water, adjust pH to 4 with 1mol / L sulfuric acid solution, then transfer to polytetrafluoroethylene reactor, and process step (1) Put the foamed nickel into the solution, put the reaction kettle into the oven, react at 160°C for 8h, after cool...

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Abstract

The invention discloses a cobalt-vanadium-based self-supporting electrode and a preparation method and application thereof, and belongs to the technical field of water electrolysis hydrogen production. Cobalt chloride and ammonium metavanadate are used as sources of cobalt and vanadium respectively, a coralline-shaped nano array precursor is synthesized on a conductive substrate through a one-step hydrothermal method, and a CoN / VN-coated NF self-supporting electrode is obtained through subsequent nitriding treatment. According to the preparation method, the subsequent treatment that the catalyst is attached to the electrode through a post-coating process and addition of an adhesive and a conductive agent is avoided, the electrode preparation process is simplified, the cost is reduced, the substrate material is of a foam structure, the catalyst can be riveted and dispersed, high loading of active components is achieved, and therefore rich catalytic sites are provided. The obtained electrode has good hydrogen evolution activity and stability, especially when the current density is increased, the hydrogen evolution activity of the electrode gradually approaches commercial Pt / C, and the electrode has the potential of large-scale production.

Description

technical field [0001] The invention relates to a cobalt-vanadium-based self-supporting electrode, a preparation method and application thereof, and belongs to the technical field of hydrogen production by electrolysis of water. Background technique [0002] Carbon neutrality means that enterprises, groups or individuals calculate the total amount of greenhouse gas emissions directly or indirectly generated within a certain period of time, and offset their own carbon dioxide emissions through afforestation, energy conservation and emission reduction, etc., to achieve "zero carbon dioxide emissions" ". To achieve carbon neutrality, there are generally two methods: ① is to remove greenhouse gases through special methods, such as carbon compensation; ② is to use renewable energy to reduce carbon emissions. [0003] As a clean energy, hydrogen energy has the characteristics of high energy density, no terrain restrictions, and no pollution from combustion products. It is conside...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/091C25B1/04C25B11/061
CPCY02P20/133
Inventor 付宏刚梁志坚王蕾沈迪
Owner HEILONGJIANG UNIV
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