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The Evolution of the Polycrystalline Copper Surface, First to Cu(111) and Then to Cu(100), at a Fixed CO_2RR Potential: A Study by Operando EC-STM

Kim, Youn-Geun and Baricuatro, Jack Hess and Javier, Alnald and Gregoire, John Mathew and Soriaga, Manuel P. (2014) The Evolution of the Polycrystalline Copper Surface, First to Cu(111) and Then to Cu(100), at a Fixed CO_2RR Potential: A Study by Operando EC-STM. Langmuir, 30 (50). pp. 15053-15056. ISSN 0743-7463. http://resolver.caltech.edu/CaltechAUTHORS:20141215-100027935

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Abstract

A study based on operando electrochemical scanning tunneling microscopy (EC-STM) has shown that a polycrystalline Cu electrode held at a fixed negative potential, −0.9 V (vs SHE), in the vicinity of CO_2 reduction reactions (CO2RR) in 0.1 M KOH, undergoes stepwise surface reconstruction, first to Cu(111) within 30 min, and then to Cu(100) after another 30 min; no further surface transformations occurred after establishment of the Cu(100) surface. The results may help explain the Cu(100)-like behavior of Cu(pc) in terms of CO_2RR product selectivity. They likewise suggest that products exclusive to Cu(100) single-crystal electrodes may be generated through the use of readily available inexpensive polycrystalline Cu electrodes. The study highlights the dynamic nature of heterogeneous electrocatalyst surfaces and also underscores the importance of operando interrogations when structure–composition–reactivity correlations are intended.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/la504445gDOIArticle
http://pubs.acs.org/doi/abs/10.1021/la504445gPublisherArticle
ORCID:
AuthorORCID
Kim, Youn-Geun0000-0002-5936-6520
Gregoire, John Mathew0000-0002-2863-5265
Soriaga, Manuel P.0000-0002-0077-6226
Alternate Title:The Evolution of the Polycrystalline Copper Surface, First to Cu(111) and Then to Cu(100), at a Fixed CO2RR Potential: A Study by Operando EC-STM
Additional Information:© 2014 American Chemical Society. Received: November 12, 2014; Revised: December 4, 2014. Publication Date (Web): December 9, 2014. 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.
Group:JCAP
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Record Number:CaltechAUTHORS:20141215-100027935
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141215-100027935
Official Citation:The Evolution of the Polycrystalline Copper Surface, First to Cu(111) and Then to Cu(100), at a Fixed CO2RR Potential: A Study by Operando EC-STM Youn-Geun Kim, Jack Hess Baricuatro, Alnald Javier, John Mathew Gregoire, and Manuel P. Soriaga Langmuir 2014 30 (50), 15053-15056
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52805
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 Dec 2014 18:27
Last Modified:12 Apr 2017 18:55

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