Large-Scale and Highly Selective CO2 Electrocatalytic Reduction on Nickel Single-Atom Catalyst
By Tingting Zheng, Kun Jiang, Na Ta, Yongfeng Hu, Jie Zeng, J. Liu, Haotian Wang. Joule, 2019
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Summary The scaling up of electrocatalytic CO2 reduction for practical applications is still hindered by a few challenges: low selectivity, small current density to maintain 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 × 10-cm2 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.
Subfields: Catalysis, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/9f67de625555a4d7e5919101149f17bd5931e020
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