Fuel cells have attracted much attention because of their advantages such as high efficiency,green safety,energy saving and environmental protection.The research and development of oxygen reduction ORR catalyst is a hot research and development in this field.Platinum group precious metal catalyst has high ORR activity,but it has problems such as high cost,poor tolerance and poor stability,and transition metal nitrogen doped carbon M-N-C catalyst is considered to be the most possible material to replace platinum-based catalyst.From the perspective of patent analysis,the author analyzed the development trend of patent applications related to transition metal nitrogen doped carbon M-N-C catalyst,the geographical distribution of patent applications,key applicatns and important patents in this field,to provide intellectual support for the development of transition metal nitrogen doped carbon M-N-C catalyst.
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