Binary metal phosphide controlled by molybdenum trioxide (tungsten), preparation method and application

Abstract

The invention relates to a binary metal phosphide controlled by molybdenum trioxide (tungsten), a preparation method and application. According to the method, foam nickel is used as a matrix, a columnar precursor is prepared by means of a hydrothermal method at first, and then a MoO3-x-controlled columnar array structure with multiple pores in the surface is formed by means of a low-temperature phosphorization method. Amorphous MoO3-x and CoP / Ni5P4 heterojunctions exist in the structure and are beneficial to the activation of water molecules and the precipitation of hydrogen. In addition, thevertical porous columnar array structure can accelerate electrolyte permeation, facilitate exposure of more electrochemically active areas and promote gas desorption from the surface of a catalyst. The structure has a great potential application value in the field of electrocatalysis.

Description

technical field

[0001] The invention relates to a binary metal phosphide regulated by molybdenum (tungsten) and its preparation method and application. Specifically, it is a function-oriented functional nanomaterial design and modification technology, and molybdenum is grown on a foamed nickel substrate by a hydrothermal method. A columnar precursor of cobalt and nickel, and low-temperature phosphating technology to prepare a porous columnar array structure. Background technique

[0002] Because of the advantages of simple preparation process and equipment, and no pollution, electrochemical total water splitting is considered to be an ideal means to prepare high-purity hydrogen. Theoretical calculations and experimental results show that binary transition metal phosphides have good water electrolysis performance, which is mainly attributed to their good electrical conductivity, the alloy effect between binary metals, and the appropriate hydrogen adsorption energy. However, ...

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