High-electrochemical-activity specific surface fuel cell electrode as well as preparation and application thereof

Abstract

The invention relates to the field of fuel cells, in particular to an electrode for a fuel cell, a catalytic layer is supported on a gas diffusion layer, and the method is magnetron sputtering or electrochemical deposition; the catalyst nanoparticle layer is Pt or an alloy of Pt and one or more than two of Ni, Pd, Co, Ru, Fe and Mo; the thickness of the catalyst nanoparticle layer is 6-20 nm, theparticle size of the catalyst nanoparticles is 6-10 nm, and the loading capacity of the catalyst is 0.05-0.1 mg cm<-2>; according to the invention, the prepared catalyst layer is processed by electrochemical etching.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to an electrode for a fuel cell. [0002] The invention includes the preparation method and application of the electrode. Background technique [0003] Due to the advantages of high energy conversion efficiency, low noise, and low pollution, proton exchange membrane fuel cells have broad application prospects in civil and military applications such as transportation, small and medium-scale power stations, household power supplies, and mobile power supplies. widespread attention. As the core component of the proton exchange membrane, the membrane electrode usually consists of a diffusion layer, a catalytic layer and a proton exchange membrane. Among them, the catalytic layer is the place where the electrochemical reaction occurs, and the commonly used noble metal catalysts (such as platinum) have limited reserves and high prices, which are an important part of the cost of fuel cells. Mag...

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Problems solved by technology

Among them, the catalytic layer is the place where the electrochemical reaction occurs, and the commonly used noble metal catalysts (such as platinum) have limited reserves and high prices, which are an important part of the cost of fuel cells.

Magnetron sputtering or electrochemical deposition is a convenient, fast, and controllable preparation method for the catalytic layer. However, the catalyst particles in the catalytic layer obtained by the above method are usually compared with the catalyst (such as commercial platinum carbon catalyst) prepared by the traditional method. Larger particle size leads to smaller electrochemically active area of ​​the electrode, lower catalyst utilization efficiency, and poorer electrode performance

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