期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 2, 页码 698-702出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201509800
关键词
atomic layers; CO2 electroreduction; cobalt oxide; formate
资金
- National Nature Science Foundation [21331005, 21422107, 21201157, 91422303, 11321503, U1532265]
- Program for New Century Excellent Talents in University [NCET-13-0546]
- Youth Innovation Promotion Association of CAS [CX2340000100]
- Fundamental Research Funds for the Central Universities [WK2340000063]
Electroreduction of CO2 into hydrocarbons could contribute to alleviating energy crisis and global warming. However, conventional electrocatalysts usually suffer from low energetic efficiency and poor durability. Herein, atomic layers for transition-metal oxides are proposed to address these problems through offering an ultralarge fraction of active sites, high electronic conductivity, and superior structural stability. As a prototype, 1.72 and 3.51 nm thick Co3O4 layers were synthesized through a fast-heating strategy. The atomic thickness endowed Co3O4 with abundant active sites, ensuring a large CO2 adsorption amount. The increased and more dispersed charge density near Fermi level allowed for enhanced electronic conductivity. The 1.72 nm thick Co3O4 layers showed over 1.5 and 20 times higher electrocatalytic activity than 3.51 nm thick Co3O4 layers and bulk counterpart, respectively. Also, 1.72 nm thick Co3O4 layers showed formate Faradaic efficiency of over 60% in 20 h.
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