Article Synopsis
- The electrochemical carbon monoxide reduction reaction (CO RR) produces synthesis gas (syngas) but has challenges in balancing CO output and hydrogen (H) generation.
- Nitrogen-doped carbon supported single-atom catalysts, particularly those combining Co and Ni, show promising results, achieving significant syngas production with CO/H ratios suitable for further chemical reactions.
- Density functional theory calculations help explain the behavior of these catalysts, highlighting how non-precious metals can effectively optimize CO RR activity while adjusting CO/H ratios.
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Article Abstract
The electrochemical CO reduction reaction (CO RR) to yield synthesis gas (syngas, CO and H ) has been considered as a promising method to realize the net reduction in CO emission. However, it is challenging to balance the CO RR activity and the CO/H ratio. To address this issue, nitrogen-doped carbon supported single-atom catalysts are designed as electrocatalysts to produce syngas from CO RR. While Co and Ni single-atom catalysts are selective in producing H and CO, respectively, electrocatalysts containing both Co and Ni show a high syngas evolution (total current >74 mA cm ) with CO/H 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 H and CO evolution. The results present a useful case on how non-precious transition metal species can maintain high CO RR activity with tunable CO/H ratios.
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