Selective CO2 electroreduction to multicarbon products exceeding 2 A cm−2 in strong acids via a hollow-fiber Cu penetration electrode

Literature Information

Publication Date 2023-12-13
DOI 10.1039/D3EE02867D
Impact Factor 38.532
Authors

Xiao Dong, Shoujie Li, Yanfang Song


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Abstract

CO2 electroreduction in acidic media is highly attractive to avoid carbonation loss, but remains a challenge for selective reduction of CO2 due to overwhelming hydrogen evolution reaction (HER) in a proton-rich environment. Herein, we report a hollow-fiber Cu penetration electrode that can effectively inhibit the HER while promoting CO2 reduction kinetics and even C–C coupling to form multicarbon (C2+) products in strong acids. A faradaic efficiency of 73.4%, a partial current density of 2.2 A cm−2, and a single pass carbon efficiency of 51.8% were achieved for C2+ production, sustaining 100 h electrolysis in a pH = 0.71 solution of H2SO4 and KCl. Sufficient CO2 feeding induced by the hollow-fiber penetration configuration greatly improved CO2 coverage on Cu active sites in strong acids, favoring CO2 activation, *CHO and *CO formation, and their couplings to C2+ products.

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Energy & Environmental Science

Energy & Environmental Science
CiteScore: 32.34
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Energy & Environmental Science is an international journal dedicated to publishing exceptionally important and high quality, agenda-setting research tackling the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. The scope is intentionally broad and the journal recognises the complexity of issues and challenges relating to energy conversion and storage, alternative fuel technologies and environmental science. For work to be published it must be linked to the energy-environment nexus and be of significant general interest to our community-spanning readership. All scales of studies and analysis, from impactful fundamental advances, to interdisciplinary research across the (bio)chemical, (bio/geo)physical sciences and chemical engineering disciplines are welcomed. Topics include, but are not limited to, the following: Solar energy conversion and photovoltaics Solar fuels and artificial photosynthesis Fuel cells Hydrogen storage and (bio) hydrogen production Materials for energy systems Capture, storage and fate of CO2, including chemicals and fuels from CO2 Catalysis for a variety of feedstocks (for example, oil, gas, coal, biomass and synthesis gas) Biofuels and biorefineries Materials in extreme environments Environmental impacts of energy technologies Global atmospheric chemistry and climate change as related to energy systems Water-energy nexus Energy systems and networks Globally applicable principles of energy policy and techno-economics

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