期刊
ADVANCED FUNCTIONAL MATERIALS
卷 27, 期 36, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201702546
关键词
atomic-scale CoOx; electrocatalysts; metal-organic frameworks; oxygen evolution reaction
类别
资金
- National Natural Science Foundation of China [51402100, 21573066]
- Provincial Natural Science Foundation of Hunan [2016JJ1006, 2016TP1009]
The activity of electrocatalysts strongly depends on the number of active sites, which can be increased by downsizing electrocatalysts. Single-atom catalysts have attracted special attention due to atomic-scale active sites. However, it is a huge challenge to obtain atomic-scale CoOx catalysts. The Co-based metal-organic frameworks (MOFs) own atomically dispersed Co ions, which motivates to design a possible pathway to partially on-site transform these Co ions to active atomic-scale CoOx species, while reserving the highly porous features of MOFs. In this work, for the first time, the targeted on-site formation of atomic-scale CoOx species is realized in ZIF-67 by O-2 plasma. The abundant pores in ZIF-67 provide channels for O-2 plasma to activate the Co ions in MOFs to on-site produce atomic-scale CoOx species, which act as the active sites to catalyze the oxygen evolution reaction with an even better activity than RuO2.
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