开发廉价、高性能的碳基非贵金属氧还原(ORR)催化剂是很多先进能源系统(如:质子交换膜燃料电池、直接甲醇燃料电池等)商业化应用的关键。采用聚丙烯腈前驱体,以升华硫为硫源,以氧化锌为模板,通过聚合、热处理等过程得到了氮、硫共掺杂的多孔类石墨烯ORR催化剂。该催化剂在碱性介质中表现出优异的ORR性能,其中部电位比商业Pt/C催化剂高出32 m V。除了优异的ORR催化性能,该催化剂还具有优异的稳定性、甲醇耐受性及接近100%的四电子催化过程选择性。通过研究催化剂的理化性质与ORR性能之间的关联,发现,引入硫后,催化剂的组成、结构、形貌都发生了明显的变化,而这些变化是催化剂具有优异ORR性能的重要原因。 Developing low-cost, high-performance carbon-based non-noble metal oxygen reduction (ORR) catalysts is the key to the commercialization of many advanced energy systems such as proton exchange membrane fuel cells and direct methanol fuel cells. By using polyacrylonitrile precursor, sublimation sulfur as sulfur source and zinc oxide as template, porous and graphene-like ORR catalyst co-doped by sulfur and sulfur was obtained by polymerization and heat treatment. The catalyst showed excellent ORR performance in alkaline media, with a partial potential 32 m above commercial Pt / C catalyst. In addition to its excellent ORR catalytic properties, the catalyst has excellent stability, methanol tolerance and nearly 100% selectivity for four-electron catalysis. Through the study of the relationship between the physical and chemical properties of catalysts and the ORR performance, it was found that the composition, structure and morphology of the catalyst have undergone significant changes after introduction of sulfur, and these changes are the important reasons for the excellent ORR performance of the catalyst.