Large-Scale and Highly Selective CO 2 Electrocatalytic Reduction on Nickel Single-Atom Catalyst

Tingting Zheng, Kun Jiang, Na Ta, Yongfeng Hu, Jie Zeng, Jingyue Liu, Haotian Wang

Research output: Contribution to journalArticlepeer-review

133 Scopus citations

Abstract

The scaling up of electrocatalytic CO 2 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 CO 2 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-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.

Original languageEnglish (US)
Pages (from-to)265-278
Number of pages14
JournalJoule
Volume3
Issue number1
DOIs
StatePublished - Jan 16 2019

Keywords

  • CO evolution
  • CO reduction
  • MEA
  • membrane electrode assembly
  • practical CO electrolysis
  • scaling up CO reduction
  • single-atom catalyst

ASJC Scopus subject areas

  • Energy(all)

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