催化作用
反应性(心理学)
钴
化学
氧气
金属
氮气
碳纤维
无机化学
氧还原反应
结晶学
物理化学
材料科学
电化学
有机化学
电极
替代医学
复合材料
病理
复合数
医学
作者
Qin Yang,Yi Jia,Fenfei Wei,Linzhou Zhuang,Dongjiang Yang,Jizi Liu,Xin Wang,Sen Lin,Pei Yuan,Xiangdong Yao
标识
DOI:10.1002/anie.202000324
摘要
Abstract Atomic metal catalysis (AMC) provides an effective way to enhance activity for the oxygen reduction reaction (ORR). Cobalt anchored on nitrogen‐doped carbon materials have been extensively reported. The carbon‐hosted Co‐N 4 structure was widely considered as the active site; however, it is very rare to investigate the activity of Co partially coordinated with N, for example, Co‐N 4− x C x . Herein, the activity of Co‐N 4− x C x with tunable coordination environment is investigated as the active sites for ORR catalysis. The defect (di‐vacancies) on carbon is essential for the formation of Co‐N 4− x C x . N species play two important roles in promoting the intrinsic activity of atomic metal catalyst: N coordinated with Co to manipulate the reactivity by modification of electronic distribution and N helped to trap more Co to increase the number of active sites.
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