Journal
JOULE
Volume 3, Issue 1, Pages 265-278Publisher
CELL PRESS
DOI: 10.1016/j.joule.2018.10.015
Keywords
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Funding
- Rowland Fellows Program at Rowland Institute, Harvard University
- NSERC
- National Research Council Canada
- Canadian Institutes of Health Research
- Province of Saskatchewan
- Western Economic Diversification Canada
- University of Saskatchewan
- National Science Foundation [CHE-1465057, ECS-0335765]
- China Scholarship Council (CSC) [201706340152, 201704910441]
- MOST of China [2014CB932700]
- NSFC [21573206]
- Rice University
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The scaling up of electrocatalytic CO2 reduction for practical applications is still hindered by a few challenges: low selectivity, small current density tomaintain a reasonable selectivity, and the cost of the catalytic materials. Here we report a facile synthesis of earth-abundant Ni single-atom catalysts on commercial carbon black, which were further employed in a gas-phase electrocatalytic reactor under ambient conditions. As a result, those single-atomic sites exhibit an extraordinary performance in reducing CO2 to CO, yielding a current density above 100 mA cm(-2), with nearly 100% selectivity for CO and around 1% toward the hydrogen evolution side reaction. By further scaling up the electrode into a 10 3 10-cm(2) modular cell, the overall current in one unit cell can easily ramp up to more than 8 A while maintaining an exclusive CO evolution with a generation rate of 3.34 L hr(-1) per unit cell.
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