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Electrochemical C2 Production from CO2 via Self-Assembled Nanoparticles of Cuprous Coordination Polymer
preprintsubmitted on 08.01.2020, 10:01 and posted on 09.01.2020, 11:49 by Naonari Sakamoto, Yusaku F. Nishimura, Takamasa Nonaka, Masataka Ohashi, Nobuhiro Ishida, Kosuke Kitazumi, Yuichi Kato, Takeo Arai
Copper (Cu) metal electrocatalysts activate the CO2 reduction reaction to produce multi electron reductants; however, the instability of the copper active species causes a change in reaction selectivity. Molecular catalysts can be designed as CO2 reduction catalysts with high selectivity, although the production of multi-electron reductants (>2e-) while maintaining the catalyst structure remains difficult. Here we present self-assembled nanoparticles of a cuprous coordination polymer (Cu-SCP) that can catalyze CO2 electrochemical reduction to C2 products, such as ethylene and ethanol, with a total faradaic efficiency of 55%. Cu-SCP maintains its metal complex structure and the Cu (I) oxidation state throughout the reaction. The Cu-SCP catalyst has advantages of being both a molecular and metal catalyst, which should open up new possibilities for CO2 reduction catalysts.