Enriching Reaction Intermediates in Multishell Structured Copper Catalysts for Boosted Propanol Electrosynthesis from Carbon Monoxide.

Du, Huitong; Liu, Li-Xia; Li, Pan; Min, Qianhao; Guo, Shaojun; Zhu, Wenlei · ACS Nano · 2023

basic_science · Level V

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Abstract

Fine-tuned catalysts that alter the diffusion kinetics of reaction intermediates is of great importance for achieving high-performance multicarbon (C<sub>2+</sub>) product generation in carbon monoxide (CO) reduction. Herein, we conduct a structural design based on Cu<sub>2</sub>O nanoparticles and present an effective strategy for enhancing propanol electrosynthesis from CO. The electrochemical characterization, operando Raman monitoring, and finite-element method simulations reveal that the multishell structured catalyst can realize the enrichment of C<sub>1</sub> and C<sub>2</sub> intermediates by nanoconfinement space, leading to the possibility of further coupling. Consequently, the multishell copper catalyst realizes a high Faraday efficiency of 22.22 ± 0.38% toward propanol at the current density of 50 mA cm<sup>-2</sup>.