American Chemical Society
cs0c01593_si_001.pdf (3.02 MB)

Self-assembled Cuprous Coordination Polymer as a Catalyst for CO2 Electrochemical Reduction into C2 Products

Download (3.02 MB)
Version 2 2020-09-03, 14:36
Version 1 2020-09-01, 13:40
journal contribution
posted on 2020-09-03, 14:36 authored by Naonari Sakamoto, Yusaku F. Nishimura, Takamasa Nonaka, Masataka Ohashi, Nobuhiro Ishida, Kosuke Kitazumi, Yuichi Kato, Keita Sekizawa, Takeshi Morikawa, Takeo Arai
C2 production with conventional metal complex catalysts has been a significant challenge. Here, we present the electrochemical reduction of CO2 into C2 products such as ethylene and ethanol with high selectivity using a self-assembled cuprous coordination polymer nanoparticle (Cu-SCP). The features of the Cu-SCP catalyst are the arrangement of Cu atoms in close proximity, similar to that in metallic Cu, and a stable Cu­(I) oxidation state throughout the reaction due to the coordination of ligands with Cu atoms, which inhibits conversion into Cu metal particles. The Cu-SCP also exhibits activity for C2 production that is superior to that of a Cu metal electrode, without modification of the carbon particles and/or ionomers or continuous flow of the highly alkaline electrolyte, which will simplify the fabrication of a CO2 electrolyzer. The Cu-SCP can be synthesized by a facile process that utilizes a heterogeneous reaction, and the product selectivity can be changed by replacement of the organic ligands, which should open up possibilities for the design of other CO2 reduction catalysts.