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
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-N4 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-N4-x Cx . Herein, the activity of Co-N4-x Cx 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-N4-x Cx . 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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