Anti-reverse nitrogen-carbon carrier catalyst for proton exchange membrane fuel cell and preparation method of anti-reverse nitrogen-carbon carrier catalyst

Abstract

The preparation method comprises the following steps: a, dissolving transition metal salt, a nitrogen source and a carbon source in a first dispersing agent to obtain a nitrogen-doped metal organic framework; b, dissolving the nitrogen-doped metal organic framework and a composite pore-forming agent in a second dispersing agent, mixing and stirring, drying, and sintering in a first sintering atmosphere to obtain a carrier porous metal nitrogen carbon material; and c, adding the porous metal nitrogen-carbon material and the noble metal precursor into a third dispersing agent, heating, drying, and sintering in a second sintering atmosphere to obtain the anti-reverse-pole catalyst. According to the preparation method, migration and agglomeration of the iridium-based compound can be effectively inhibited, the stability of the catalyst is improved, and the catalyst has excellent performance of high activity and high stability.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to an anti-reverse polar nitrogen carbon carrier catalyst for a proton exchange membrane fuel cell, and further relates to a preparation method of the anti-reverse polar nitrogen carbon carrier catalyst for the proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cell is a kind of fuel (such as H 2 ) and oxidizing agents (such as O 2 ) directly converts the chemical energy into electrical energy, and the energy conversion process of the system is not limited by the thermodynamic Carnot cycle. Its working principle is fuel (such as H 2 ) in the anode oxidation reaction to generate H + and e - , H + It is transmitted to the cathode through the proton exchange membrane, and e- flows to the cathode through the external circuit, so that the oxidant of the cathode (such as O 2 ) and H + and e - Combined with a reduction reaction to gen...

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Problems solved by technology

However, during the test, the traditional "anti-reversal" catalysts will quickly aggregate the metal active sites, resulting in a sharp drop in the activity of the electrolytic water oxidation reaction, which leads to the inability of the traditional "anti-reverse" catalysts to be long-term and efficient. Inhibit the progress of carbon carrier oxidation reaction, resulting in unreliable and unstable vehicle operation

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