Electrochemical Conversion of CO2 to Syngas with Controllable CO/H2 Ratios over Co and Ni Single-Atom Catalysts
- Univ. of Science and Technology of China, Anhui (China); Columbia Univ., New York, NY (United States)
- Nanyang Technological Univ. (Singapore)
- Columbia Univ., New York, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Florida A & M University, Tallahassee, FL (United States)
- Univ. of Science and Technology of China, Anhui (China)
- Columbia Univ., New York, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
The electrochemical CO2 reduction reaction (CO2RR) to yield synthesis gas (syngas, CO and H2) has been considered as a promising method to realize the net reduction in CO2 emission. However, it is challenging to balance the CO2RR activity and the CO/H2 ratio. To address this issue, nitrogen-doped carbon supported single-atom catalysts are designed as electrocatalysts to produce syngas from CO2RR. While Co and Ni single-atom catalysts are selective in producing H2 and CO, respectively, electrocatalysts containing both Co and Ni show a high syngas evolution (total current 74 mA cm-2) with CO/H2 ratios (0.23-2.26) that are suitable for typical downstream thermochemical reactions. Density functional theory calculations provide insights into the key intermediates on Co and Ni single-atom configurations for the H2 and CO evolution. The results present a useful case on how non-precious transition metal species can maintain high CO2RR activity with tunable CO/H2 ratios.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1580239
- Alternate ID(s):
- OSTI ID: 1581860
- Report Number(s):
- BNL-212468-2019-JAAM
- Journal Information:
- Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 8 Vol. 132; ISSN 0044-8249
- Publisher:
- German Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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