Nano-porous Al-Ni-M-RE-R amorphous alloy used as hydrogen evolution catalytic electrode, and preparation method thereof

Abstract

The invention discloses a nano-porous Al-Ni-M-RE-R amorphous alloy used as a hydrogen evolution catalytic electrode, wherein a transition metal element M is Fe, Co, Cr and Cu, a rare earth element REis Y, La, Gd and Ce, a precious metal R is Pt, Ru, Pd, Rh, Au and Ir, and a hydrogen evolution catalytic electrode comprises the following components in percentage by mass: Al, 2-12% of Ni, 1-13% of M, 2-13% of RE, and 0.2-7% of R, and is treated by adopting a constant current method, a corrosion method or a pulse corrosion current method, so that the prepared nano porous amorphous alloy is stablein structure, large in specific surface area, adjustable in component, structure and morphology and high in catalytic activity. According to the invention, when the nano-porous amorphous alloy hydrogen evolution electrode is used as a water electrolysis hydrogen evolution catalytic electrode, the hydrogen evolution overpotential is 40-65 mV and the Tafel slope is 10-60 mV / dec under the current density of 10 mA.cm<-2>, so that the nano-porous amorphous alloy hydrogen evolution electrode has excellent hydrogen evolution catalytic activity.

Description

technical field [0001] The present invention relates to a hydrogen evolution catalytic electrode, more particularly, refers to a nanoporous Al-(2~12%)Ni-(1~13%)M-(2~13%)RE-(0.2~ 7%) hydrogen evolution catalytic electrode of R amorphous alloy. Background technique [0002] As a clean energy that can replace fossil fuels, hydrogen energy will have huge advantages in future energy consumption. At present, the preparation technologies of hydrogen energy mainly include: hydrogen production from fossil fuels, hydrogen production by photolysis of water, and hydrogen production by electrolysis of water. Among them, hydrogen production by electrolysis of water is a clean technology that can be applied to large-scale industrial production, and has the advantages of abundant raw material sources and high purity of gas production, so that more and more researchers have begun to devote themselves to research in this area. [0003] An excellent hydrogen evolution catalyst needs to have ...

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Problems solved by technology

Due to the instability of the porous structure at the nanometer scale, it is often difficult to prepare nanoporous structures for metals with more active physical and chemical properties. Palladium (Pd), platinum (Pt)) and nanoporous nickel (Ni), copper (Cu), titanium (Ti) and other metals with relatively stable physical and chemical properties, and reports on chemically active metal nanoporous materials such as aluminum (Al) rarely

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