Preparation and application of a three-dimensional structure niwp electrocatalyst material

Abstract

The invention relates to a preparation and application of a NiWP electric catalyst material with a three-dimensional structure, which belongs to the technical field of clean energy materials. The preparation comprises the following steps: preprocessing foam metal (cathode matrix material) and a pure nickel sheet (anode material) to remove oxides and impurities on the surface; respectively adding a nickel salt and tungsten salt into distilled water according to a ratio, uniformly dissolving in a magnetic stirrer, adding a complexing agent, stirring and dissolving the complexing agent in a tungsten salt-containing solution, mixing the two solutions, then adding a phosphorus salt, uniformly stirring, and finally adjusting a pH value of plating solution by utilizing sulfuric acid and ammonia water; and performing the electric precipitation under a given current density and temperature by adopting a direct-current voltage stabilizing power supply, after a given time of precipitation, cleaning the surface of a test sample by utilizing deionized water, and drying at a room temperature to obtain the NiWP electric catalyst with the three-dimensional structure. The electric catalyst prepared by using the method can effectively reduce overpotential of water electrolysis hydrogen evolution reaction and oxygen evolution reaction by virtue of electrochemical test, and has good circulating stability. The preparation method is simple in process procedures, easy in operation and good in application prospect.

Description

Technical field: [0001] The invention provides a three-dimensional structure NiWP bifunctional electrocatalyst material preparation technology, which belongs to the technical field of clean energy preparation. Background technique: [0002] In recent years, with the intensification of environmental pollution and the deepening of human understanding of non-renewable resources, in order to alleviate the increasingly severe environmental problems, human beings urgently need to find a cleaner, cheaper, more convenient and more effective way of energy supply. As the most ideal clean energy in the 21st century, hydrogen has gradually attracted the attention of scientists all over the world. Electrolyzed water technology is based on the principle of electrochemical water splitting, using renewable electric energy or solar energy to drive water splitting into hydrogen and oxygen, which is considered to be the most promising and sustainable way to produce hydrogen. However, the hydr...

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Problems solved by technology

In the electrolytic water hydrogen evolution reaction (HER), Pt-based metals are the best catalysts, and the anodic oxygen evolution reaction (OER) is also highly dependent on iridium oxide and ruthenium oxide (platinum, iridium, and ruthenium are all noble metals), but because The scarcity of crustal reserves and high cost limit its large-scale application, so it is imperative to prepare non-precious metal electrocatalysts with high catalytic efficiency

[0003] At present, the research on non-precious metal electrocatalysts mainly focuses on binary phosphides, although the price is low, but the catalytic performance is not as good as that of Pt-based metals.

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