Non-noble metal catalytic material loaded core-shell catalyst, preparation method and application thereof

Abstract

The invention discloses a non-noble metal catalytic material loaded core-shell catalyst, a preparation method and an application thereof. The catalyst comprises a non-noble metal doped carbon-nitrogencarrier catalytic material and core-shell particles loaded to the surface of the carbon-nitrogen carrier catalytic material. The catalyst is the core-shell catalyst of the non-noble carbon-nitrogen carrier catalytic material loaded with noble metals, has various catalytic active sites and relatively good catalytic activity and excellent transfer attributes of substances such as electrons and gasand hydrophobicity, and is low in cost. The preparation method can be used for preparing the core-shell catalytic particles by fully using residual non-noble metals in the non-noble metal catalyst preparation process, and can save the tie, simplify the electrode preparation steps and improve the activity of the catalyst and the utilization ratio of platinum. The catalyst is characterized in that the catalyst has the advantages of being low in platinum content, high in platinum utilization ratio, low in cost, high in catalytic activity and various in catalytic active sites and the compound catalyst has the advantages of being porous and orderly, relatively good in lyophobic characteristic, good gas and electron transfer characteristic integrally and the like.

Description

technical field [0001] The invention relates to the technical field of fuel cell catalytic materials, and more specifically relates to a core-shell catalyst supported by a non-noble metal catalytic material, a preparation method and an application thereof. Background technique [0002] Energy production, supply and consumption methods not only affect the economic development level of an economy and people's living standards, but are also particularly related to the earth's environment and climate change. The contradiction between limited fossil energy reserves, especially oil, gas and coal, and increasing energy consumption is becoming more and more prominent. Especially with the continuous increase of the total population of the earth, the current energy consumption mode that is highly dependent on fossil fuels not only seriously increases the burden on the earth, rapidly consumes non-renewable resources such as coal, oil and natural gas, but also brings great harm to the e...

AI Technical Summary

Problems solved by technology

But on the other hand, the overall catalytic performance and stability of various non-precious metal catalysts including transition metals and nitrogen-doped carbon materials are still lagging behind platinum-based catalysts, and they cannot compete with the latter and completely replace the latter. The development of various non-platinum catalysts is mostly limited to the laboratory level, and there are many half-cell test reports

Although single-cell performance tests have been reported, the number is very small, which shows that the development and application of this type of catalyst still needs a long way to go, and it cannot fully adapt to the rapid development and development of current fuel cells, especially low-temperature proton exchange membrane fuel cells. Application status

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