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Catalyst electro-redeposition controls morphology and oxidation state for selective carbon dioxide reduction

Journal Article · · Nature Catalysis
 [1];  [2];  [2];  [3];  [2];  [2];  [4];  [2];  [5];  [6]
  1. Univ. of Toronto, ON (Canada); Canadian Institute for Advanced Research, Toronto, ON (Canada). Bio-inspired Solar Energy Program; Univ. of California, Berkeley, CA (United States)
  2. Univ. of Toronto, ON (Canada)
  3. Canadian Institute for Advanced Research, Toronto, ON (Canada). Bio-inspired Solar Energy Program; Univ. of California, Berkeley, CA (United States)
  4. Canadian Light Source Inc. (CLSI), Saskatoon, SK (Canada)
  5. Canadian Institute for Advanced Research, Toronto, ON (Canada). Bio-inspired Solar Energy Program; Univ. of California, Berkeley, CA (United States). Kavli Energy Nanosciences Institute; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Canadian Institute for Advanced Research, Toronto, ON (Canada). Bio-inspired Solar Energy Program; Univ. of Toronto, ON (Canada)
We present that the reduction of carbon dioxide to renewable fuels and feedstocks offers opportunities for large-scale, long-term energy storage. The synthesis of efficient CO2 reduction electrocatalysts with high C2:C1 selectivity remains a field of intense interest. Here we present electro-redeposition, the dissolution and redeposition of copper from a sol-gel, to enhance copper catalysts in terms of their morphology, oxidation state and consequent performance. We utilized in situ soft X-ray absorption spectroscopy to track the oxidation state of copper under CO2 reduction conditions with time resolution. The sol-gel material slows the electrochemical reduction of copper, enabling control over nanoscale morphology and the stabilization of Cu+ at negative potentials. CO2 reduction experiments, in situ X-ray spectroscopy and density functional theory simulations revealed the beneficial interplay between sharp morphologies and Cu+ oxidation state. Finally, the catalyst exhibits a partial ethylene current density of 160 mA cm-2(-1.0 V versus reversible hydrogen electrode) and an ethylene/methane ratio of 200.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1465700
Journal Information:
Nature Catalysis, Journal Name: Nature Catalysis Journal Issue: 2 Vol. 1; ISSN 2520-1158
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (9)

Quantitatively Unraveling the Redox Shuttle of Spontaneous Oxidation/Electroreduction of CuO x on Silver Nanowires Using in Situ X-ray Absorption Spectroscopy journal December 2019
In Situ Infrared Spectroscopy Reveals Persistent Alkalinity near Electrode Surfaces during CO 2 Electroreduction journal September 2019
Computational and experimental demonstrations of one-pot tandem catalysis for electrochemical carbon dioxide reduction to methane journal July 2019
Carbon dioxide electroreduction to C2 products over copper-cuprous oxide derived from electrosynthesized copper complex journal August 2019
Visible-light-switched electron transfer over single porphyrin-metal atom center for highly selective electroreduction of carbon dioxide journal August 2019
Hydroxide promotes carbon dioxide electroreduction to ethanol on copper via tuning of adsorbed hydrogen journal December 2019
Theoretical insights into selective electrochemical conversion of carbon dioxide journal March 2019
On-Surface Modification of Copper Cathodes by Copper(I)-Catalyzed Azide Alkyne Cycloaddition and CO2 Reduction in Organic Environments journal December 2019
Origin of the selective electroreduction of carbon dioxide to formate by chalcogen modified copper text January 2018

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