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Seriatim ECSTM-DEMS of Cu-catalyzed reduction of CO in alkaline solution: Operando correlation of electrode-surface atomic structure with product selectivity

Kim, Youn-Geun and Javier, Alnald and Baricuatro, Jack H. and Soriaga, Manuel P. (2017) Seriatim ECSTM-DEMS of Cu-catalyzed reduction of CO in alkaline solution: Operando correlation of electrode-surface atomic structure with product selectivity. Current Topics in Catalysis, 13 . pp. 1-9. ISSN 0972-4508. https://resolver.caltech.edu/CaltechAUTHORS:20190819-125347135

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Abstract

Copper is the only unalloyed metal that can deliver, in a “one-pot” heterogeneous electrochemical reduction of CO_2, a remarkable variety of products, up to fifteen hydrocarbons and oxygenates, in different yields. Its overall activity may be substantial, but its selectivity is far from desirable. In the production of liquid fuels, Cu generates only ethanol at nominal efficiencies that depend upon the particular electrode-surface structure. The optimization of ethanol production may be aided by the correlation, under actual reaction conditions, between the atomic structures of the Cu surfaces and their respective product selectivities. Such operando correlation is made possible by the seriatim (sequential) application of electrochemical scanning tunneling microscopy (ECSTM) and differential electrochemical mass spectrometry (DEMS). The present quasi-review paper describes how seriatim ECSTM-DEMS was utilized to show that ethanol is generated exclusively, sans other hydrocarbons and oxygenates, by a stepped Cu(S)-[3(100)×(111)], or Cu(511), surface at appreciably low overvoltages.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.31300/ctct.13.2017.1-9DOIArticle
ORCID:
AuthorORCID
Kim, Youn-Geun0000-0002-5936-6520
Javier, Alnald0000-0002-0306-5462
Soriaga, Manuel P.0000-0002-0077-6226
Additional Information:© 2017 Research Trends Ltd. This material is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award No. DE-SC0004993. None of the authors have any conflicts of interest to declare.
Group:JCAP
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Subject Keywords:electrochemical scanning tunneling microscopy (ECSTM), Cu-catalyzed electrochemical reduction of CO2, differential electrochemical mass spectrometry (DEMS), seriatim ECSTM-DEMS, Cu(S)-[3(100)x(111)] or Cu(511) stepped surfaces
Record Number:CaltechAUTHORS:20190819-125347135
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190819-125347135
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98000
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:19 Aug 2019 20:53
Last Modified:09 Mar 2020 13:18

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