Journal
ADVANCED ENERGY MATERIALS
Volume 8, Issue 35, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201801536
Keywords
bismuth; CO2 reduction; formate; mesoporous nanosheets; selectivity
Categories
Funding
- Ministry of Science and Technology of China [2017YFA0204800]
- National Natural Science Foundation of China [51472173, 51522208]
- Natural Science Foundation of Jiangsu Province [SBK2015010320]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office
- DOE Office of Science [DE-AC02-06CH11357]
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The conversion of CO2 to value-added products using electrical or solar energy represents an attractive means for the capture and utilization of atmospheric CO2. Formate is a popular product from CO2 reduction, but its reaction selectivity is usually unsatisfactory. Tin-based materials have attracted the most attention for formate production at present. Unfortunately, most of them only exhibit moderate selectivity in a narrow and highly cathodic potential window. In this study, it is demonstrated that traditionally under-explored bismuth has a much greater potential for formate production than tin or other materials. Mesoporous bismuth nanosheets are prepared here by the cathodic transformation of atomic-thick bismuth oxycarbonate nanosheets. They enable the selective CO2 reduction to formate with large current density, excellent Faradaic efficiency (approximate to 100%) over a broad potential window and great operation stability. Moreover, Bi nanosheets are integrated with an oxygen evolution reaction electrocatalyst in full cells, and achieve efficient and robust solar conversion of CO2/H2O to formate/O-2.
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