期刊
SMALL METHODS
卷 5, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smtd.202000991
关键词
2D nanosheets; carbon dioxide reduction; photocoupled electrocatalysis; porphyrin; visualized channels
资金
- National Key R&D Program of China [2017YFA0700101, 2016YFA0202801]
- NSFC [22035004]
- China Postdoctoral Science Foundation [043260424]
A series of single metal atoms anchored 2D metal-organic framework nanosheets were fabricated, showing enhanced CO2 reduction activity and selectivity with the assistance of visible-light. Among them, MOF-NS-Co achieved a CO Faradaic efficiency of 98.7%, displaying excellent catalytic performance.
2D catalysts combined with single atom sites are promising candidates to promote CO2 reduction performance, but the ability to target stable materials with distinct structure still remains challenging. Herein, a series of single metal atoms anchored 2D metal-organic framework nanosheets (MOF-NS-M) with visualized and well-ordered mesoporous structures are fabricated and exhibit enhanced CO2 reduction activity and selectivity with the assistance of visible-light. Encouragingly, the CO Faradaic efficiency of MOF-NS-Co exceeds 90% in a wide potential window of -0.5 to -1.0 V versus RHE and reaches 98.7% with 100 mV positive shift compared with the result measured under dark. The catalytic kinetics studies show a fast initial electron transfer to CO2 to form *COO-, thanks to the sufficient exposed active sites resulting from the nanosheet nature and adjusted electron transfer pathway caused by the porphyrin photoswitch.
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