Design And Electrochemical CO₂/O₂ Reduction Performance Of CuSn Diatom And PtZn Alloy Catalysts Supported By Carbon

With the massive exploitation and consumption of energy,how to solve the ecological problems caused by energy consumption has become a common problem in today’s society.In order to deal with various problems caused by excessive use of energy,people have done a lot of research on how to realize energy recycling,and developed some new technologies,such as carbon dioxide reduction（CO₂RR）and fuel cell.However,the support of new technology is the development of new materials.How to find high activity and high selectivity catalyst materials among the existing materials has become the focus of research.In this paper,a nitrogen-doped cu-Sn diatomic catalyst（Cu Sn/NC）on carbon was successfully designed and synthesized,which can effectively carry out electrochemical CO₂RR,which has certain guiding significance for reducing CO₂ and alleviating energy crisis.The catalyst is highly selective for CO in electrochemical CO₂RR,with a Faraday efficiency of 99.1%at the potential of-0.75 V（relative to reversible hydrogen electrode,vs.RHE）,and remains stable after 24 hours of continuous electrochemical testing.Its excellent CO₂RR performance is due to its special atomic coordination structure,which is beneficial to weaken the C-O bond and improve the catalytic activity.In order to solve the environmental problem,another effective way is the new fuel cell,and improving the oxygen reduction（ORR）reaction efficiency of cathode is the key problem.In this paper,a nitrogen-doped Pt Zn/NC catalyst（Pt Zn/NC）was designed and synthesized.In the electrochemical oxygen reduction performance test,it was found that the performance was better in acidic medium,and the half-wave potential of0.839 V（relative to reversible hydrogen electrode,vs.RHE）was much higher than that of commercial Pt/C.The stability of the catalyst was tested and only 2 m V of decay was found after 3000 cycles of scanning.Its excellent ORR performance is expected to replace a single noble metal catalyst and provide a new direction for the study of alloying between noble metal and non-noble metal.