To tackle the issues of high cost,low durability and poor resistance to chemical poisoning of Pt-based materials as cathode catalysts for an oxygen reduction reaction(ORR),an effective method is to design and synthesi...To tackle the issues of high cost,low durability and poor resistance to chemical poisoning of Pt-based materials as cathode catalysts for an oxygen reduction reaction(ORR),an effective method is to design and synthesize heteroatom doped carbon materials,regarded as promising electrocatalysts to replace Ptbased counterparts,due to their low cost,high stability and anti-poisoning ability.The potential of N,B co-doping has been proved by theoretical calculations,and there are still great challenges in the synthesis of such materials.Here,we employ a facile approach to obtain a N,B co-doped carbon material.The resulting material pyrolysed at 1000°C(NBC-1000)shows excellent ORR activity,exceeding that of the same type of catalysts reported so far.Not only is the NBC-1000 electrocatalyst comparable to the commercial Pt/C in terms of the onset potential,half-wave potential,diffusion limiting current density and electron transfer number,but also it has better durability and methanol tolerance than Pt/C.展开更多
基金supported by the Collaborative Innovation Center of Suzhou Nano Science and Technology,the National Natural Science Foundation of China(51725204,51572179,21471106,21771132,and 21501126)the Natural Science Foundation of Jiangsu Province(BK20161216)the 111 project and a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).
文摘To tackle the issues of high cost,low durability and poor resistance to chemical poisoning of Pt-based materials as cathode catalysts for an oxygen reduction reaction(ORR),an effective method is to design and synthesize heteroatom doped carbon materials,regarded as promising electrocatalysts to replace Ptbased counterparts,due to their low cost,high stability and anti-poisoning ability.The potential of N,B co-doping has been proved by theoretical calculations,and there are still great challenges in the synthesis of such materials.Here,we employ a facile approach to obtain a N,B co-doped carbon material.The resulting material pyrolysed at 1000°C(NBC-1000)shows excellent ORR activity,exceeding that of the same type of catalysts reported so far.Not only is the NBC-1000 electrocatalyst comparable to the commercial Pt/C in terms of the onset potential,half-wave potential,diffusion limiting current density and electron transfer number,but also it has better durability and methanol tolerance than Pt/C.
