Login / Signup

Promoting CO Electroreduction to C 2+ Oxygenates by Distribution of Water Dissociation Sites.

Chao YangYaqin YanYuncheng HuYangshen ChenAnxiang GuanCejun HuLijuan ZhangGengfeng Zheng
Published in: Small methods (2024)
The electrocatalytic CO 2 or CO reduction reaction is a complex proton-coupled electron transfer reaction, in which protons in the electrolyte have a critical effect on the surface adsorbed * H species and the multi-carbon oxygenate products such as ethanol. However, the coupling of * H and carbon-containing intermediates into C 2+ oxygenates can be severely hampered by the inappropriate distributions of those species in the catalytic interfaces. In this work, the controlled distribution of highly dispersed CeO x nanoclusters is demonstrated on Cu nanosheets as an efficient CO electroreduction catalyst, with Faradaic efficiencies of ethanol and total oxygenates of 35% and 58%, respectively. The CeO x nanoclusters (2-5 nm) enabled efficient water dissociation and appropriate distribution of adsorbed * H species on the Cu surface with carbon-containing species, thus facilitating the generation of C 2+ oxygenate products. In contrast, pristine Cu without CeO x tended to form ethylene, while the aggregated CeO x nanoparticles promoted the surface density of * H and subsequent H 2 evolution.
Keyphrases
  • electron transfer
  • metal organic framework
  • reduced graphene oxide
  • magnetic resonance
  • ionic liquid
  • photodynamic therapy
  • aqueous solution
  • fluorescent probe
  • sensitive detection
  • solid state
  • energy transfer