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. doi:10.1021/la504445g. https://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.
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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 | ||||||||||
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Issue or Number: | 50 | ||||||||||
DOI: | 10.1021/la504445g | ||||||||||
Record Number: | CaltechAUTHORS:20141215-100027935 | ||||||||||
Persistent URL: | https://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: | 10 Nov 2021 19:44 |
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