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Ultrathin Co3O4Layers Realizing Optimized CO2Electroreduction to Formate
- Source :
- Angewandte Chemie International Edition. 55:698-702
- Publication Year :
- 2015
- Publisher :
- Wiley, 2015.
-
Abstract
- 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.
- Subjects :
- Materials science
Inorganic chemistry
02 engineering and technology
Photochemistry
010402 general chemistry
01 natural sciences
Catalysis
chemistry.chemical_compound
symbols.namesake
Formate
Cobalt oxide
010405 organic chemistry
Fermi level
Charge density
General Medicine
General Chemistry
021001 nanoscience & nanotechnology
Co2 adsorption
0104 chemical sciences
chemistry
Chemical engineering
Structural stability
symbols
Electronic conductivity
0210 nano-technology
Faraday efficiency
Subjects
Details
- ISSN :
- 14337851
- Volume :
- 55
- Database :
- OpenAIRE
- Journal :
- Angewandte Chemie International Edition
- Accession number :
- edsair.doi.dedup.....6b9f08ea1ec89b38078813a8dd61c15c