Fuel cell membrane electrode employing ruthenium telluride as cathode and preparation method

Abstract

The invention provides a fuel cell membrane electrode employing ruthenium telluride as a cathode and a preparation method. The membrane electrode comprises a proton exchange membrane, a cathode catalyst layer and an anode catalyst layer, wherein a carrier load of the cathode catalyst layer is a ruthenium-tellurium compound catalyst formed by ruthenium and tellurium or a ruthenium-based alloy nano-catalyst. The preparation method of the fuel cell membrane electrode comprises the steps of preparing paste for an anode, preparing the anode catalyst layer, preparing paste for a cathode and preparing the cathode catalyst layer, thereby finally completing preparation of the whole membrane electrode. The fuel cell membrane electrode has the beneficial effects that the fuel cell membrane electrodeis prepared by adopting the ruthenium telluride as the cathode catalyst layer instead of a traditional platinum-based catalyst layer, so that the preparation process is simple and the obtained membrane electrode is stable in performance and high in yield; and a non-platinum catalyst is utilized as the catalyst layer by the cathode, so that the cost of the fuel cell membrane electrode is greatly reduced, the poisoning resistance and the methanol oxidation resistance of the cathode are obviously improved and the fuel cell membrane electrode has a wide application prospect in a methanol fuel celland a small portable hydrogen fuel cell.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell membrane electrode using a ruthenium-based telluride as a cathode and a preparation method thereof. Background technique [0002] Fuel cells are devices that directly convert chemical energy into electrical energy. Because of their high energy conversion efficiency, environmental friendliness, and high energy density, they are considered to be the most promising renewable energy sources to replace traditional fossil fuels. At present, the catalytic layer of the membrane electrode, which is the key material of the fuel cell, is mainly platinum or its alloy nanocatalyst. However, platinum resources are scarce and expensive, and the use of non-platinum catalysts with high catalytic activity and high stability as the catalytic layer of membrane electrodes is the key to the commercialization of fuel cells. At present, non-platinum catalyst materials include non-platinu...

AI Technical Summary

Problems solved by technology

[0004] Secondly, catalyst life and anti-poisoning issues

Due to the presence of impurities such as carbon oxides, sulfur oxides, or nitrogen oxides in the process of hydrogen production, platinum is easily poisoned, resulting in a decrease in activity; the oxygen reduction reaction that occurs at the cathode in PEMFC has a high overpotential, and most metals in aqueous solution Unstable, the surface of the electrode is easy to form oxygen or the adsorption of various oxygen-containing ions, or form an oxide film, and platinum is easily oxidized to reduce the activity; when methanol is used as fuel, due to methanol penetration, a mixed potential is formed at the cathode, which reduces the work of the battery performance

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