Electrocatalytic Reduction of CO2 to Ethanol at Close to Theoretical Potential via Engineering Abundant Electron‐Donating Cuδ+ Species

Electrochemical CO2 reduction to liquid multi‐carbon alcohols provides a promising way for intermittent renewable energy reservation and greenhouse effect mitigation. Cuδ+ (0

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Published in:Angewandte Chemie International Edition 2022-08, Vol.61 (32), p.e202205909-n/a
Main Authors: Guo, Chengying, Guo, Yihe, Shi, Yanmei, Lan, Xianen, Wang, Yuting, Yu, Yifu, Zhang, Bin
Format: Article
Language:English
Subjects:
Alcohols
Carbon dioxide
Catalysts
Chemical reduction
CO2 Reduction
Cuδ+ Species
Economic analysis
Electrocatalysis
Electrocatalysts
Electrochemistry
Ethanol
Greenhouse effect
Renewable energy
Selectivity
Species
Stability analysis
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container_issue 32
container_start_page e202205909
container_title Angewandte Chemie International Edition
container_volume 61
creator Guo, Chengying
Guo, Yihe
Shi, Yanmei
Lan, Xianen
Wang, Yuting
Yu, Yifu
Zhang, Bin
description Electrochemical CO2 reduction to liquid multi‐carbon alcohols provides a promising way for intermittent renewable energy reservation and greenhouse effect mitigation. Cuδ+ (0
doi_str_mv 10.1002/anie.202205909
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Cuδ+ (0&lt;δ&lt;1) species on Cu‐based electrocatalysts can produce ethanol, but the in situ formed Cuδ+ is insufficient and easily reduced to Cu0. Here a Cu2S1−x catalyst with abundant Cuδ+ (0&lt;δ&lt;1) species is designedly synthesized and exhibited an ultralow overpotential of 0.19 V for ethanol production. The catalyst not only delivers an outstanding ethanol selectivity of 86.9 % and a Faradaic efficiency of 73.3 % but also provides a long‐term stability of Cuδ+, gaining an economic profit based on techno‐economic analysis. The calculation and in situ spectroscopic results reveal that the abundant Cuδ+ sites display electron‐donating ability, leading to the decrease of the reaction barrier in the potential‐determining C−C coupling step and eventually making the applied potential close to the theoretical value. Cu2S1−x hollow nanocubes with abundant and stable Cuδ+ species are synthesized and achieve ethanol‐selective electrosynthesis. 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Cuδ+ (0&lt;δ&lt;1) species on Cu‐based electrocatalysts can produce ethanol, but the in situ formed Cuδ+ is insufficient and easily reduced to Cu0. Here a Cu2S1−x catalyst with abundant Cuδ+ (0&lt;δ&lt;1) species is designedly synthesized and exhibited an ultralow overpotential of 0.19 V for ethanol production. The catalyst not only delivers an outstanding ethanol selectivity of 86.9 % and a Faradaic efficiency of 73.3 % but also provides a long‐term stability of Cuδ+, gaining an economic profit based on techno‐economic analysis. The calculation and in situ spectroscopic results reveal that the abundant Cuδ+ sites display electron‐donating ability, leading to the decrease of the reaction barrier in the potential‐determining C−C coupling step and eventually making the applied potential close to the theoretical value. Cu2S1−x hollow nanocubes with abundant and stable Cuδ+ species are synthesized and achieve ethanol‐selective electrosynthesis. 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source Wiley-Blackwell Read & Publish Collection
subjects Alcohols
Carbon dioxide
Catalysts
Chemical reduction
CO2 Reduction
Cuδ+ Species
Economic analysis
Electrocatalysis
Electrocatalysts
Electrochemistry
Ethanol
Greenhouse effect
Renewable energy
Selectivity
Species
Stability analysis
title Electrocatalytic Reduction of CO2 to Ethanol at Close to Theoretical Potential via Engineering Abundant Electron‐Donating Cuδ+ Species
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