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Unraveling the rate-determining step of C<sub>2+</sub> products during electrochemical CO reduction

Chemistry

Unraveling the rate-determining step of C<sub>2+</sub> products during electrochemical CO reduction

W. Deng, P. Zhang, et al.

Discover how researchers Wanyu Deng, Peng Zhang, Yu Qiao, and others uncovered the critical rate-determining step in the electrochemical reduction of CO to valuable multi-carbon products. Their findings highlight the dominance of *CO-*CO coupling, offering exciting insights into sustainable fuel production.

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Playback language: English
Abstract
The electrochemical reduction of CO (COER) into valuable multi-carbon (C<sub>2+</sub>) products is a promising pathway for sustainable fuel production. This paper investigates the rate-determining step (RDS) of COER to C<sub>2+</sub> products, focusing on whether C-C coupling or CO hydrogenation is dominant. Experimental analysis of pH dependency, kinetic isotope effects, and CO partial pressure effects reveals that *CO-*CO coupling is the RDS for multi-carbon product formation, a conclusion verified across various copper catalysts.
Publisher
Nature Communications
Published On
Jan 30, 2024
Authors
Wanyu Deng, Peng Zhang, Yu Qiao, Georg Kastlunger, Nitish Govindarajan, Aoni Xu, Ib Chorkendorff, Brian Seger, Jinlong Gong
Tags
electrochemical reduction
COER
multi-carbon products
rate-determining step
CO coupling
copper catalysts
sustainable fuel

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