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Ultrathin Co3O4 Layers Realizing Optimized CO2 Electroreduction to Formate.
- Source :
- Angewandte Chemie International Edition; 1/11/2016, Vol. 55 Issue 2, p698-702, 5p
- Publication Year :
- 2016
-
Abstract
- Electroreduction of CO<subscript>2</subscript> 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 Co<subscript>3</subscript>O<subscript>4</subscript> layers were synthesized through a fast-heating strategy. The atomic thickness endowed Co<subscript>3</subscript>O<subscript>4</subscript> with abundant active sites, ensuring a large CO<subscript>2</subscript> adsorption amount. The increased and more dispersed charge density near Fermi level allowed for enhanced electronic conductivity. The 1.72 nm thick Co<subscript>3</subscript>O<subscript>4</subscript> layers showed over 1.5 and 20 times higher electrocatalytic activity than 3.51 nm thick Co<subscript>3</subscript>O<subscript>4</subscript> layers and bulk counterpart, respectively. Also, 1.72 nm thick Co<subscript>3</subscript>O<subscript>4</subscript> layers showed formate Faradaic efficiency of over 60% in 20 h. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 55
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 116320711
- Full Text :
- https://doi.org/10.1002/anie.201509800