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Structural Evolution of Ga–Cu Model Catalysts for CO(2) Hydrogenation Reactions
[Image: see text] We studied the initial stages of Ga interaction with the Cu(001) surface and environment-induced surface transformations in an attempt to elucidate the surface chemistry of the Cu–Ga catalysts recently proposed for CO(2) hydrogenation to methanol. The results show that Ga readily i...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7830109/ https://www.ncbi.nlm.nih.gov/pubmed/33510828 http://dx.doi.org/10.1021/acs.jpcc.0c09382 |
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author | Zhong, Jian-Qiang Shaikhutdinov, Shamil Roldan Cuenya, Beatriz |
author_facet | Zhong, Jian-Qiang Shaikhutdinov, Shamil Roldan Cuenya, Beatriz |
author_sort | Zhong, Jian-Qiang |
collection | PubMed |
description | [Image: see text] We studied the initial stages of Ga interaction with the Cu(001) surface and environment-induced surface transformations in an attempt to elucidate the surface chemistry of the Cu–Ga catalysts recently proposed for CO(2) hydrogenation to methanol. The results show that Ga readily intermixes with Cu upon deposition in vacuum. However, even traces of oxygen in the gas ambient cause Ga oxidation and the formation of two-dimensional (“monolayer”) Ga oxide islands uniformly covering the Cu surface. The surface morphology and the oxidized state of Ga remain in H(2) as well as in a CO(2) + H(2) reaction mixture at elevated pressures and temperatures (0.2 mbar, 700 K). The results indicate that the Ga-doped Cu surface under reaction conditions exposes a variety of structures including GaO(x)/Cu interfacial sites, which must be taken into account for elucidating the reaction mechanism. |
format | Online Article Text |
id | pubmed-7830109 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-78301092021-01-26 Structural Evolution of Ga–Cu Model Catalysts for CO(2) Hydrogenation Reactions Zhong, Jian-Qiang Shaikhutdinov, Shamil Roldan Cuenya, Beatriz J Phys Chem C Nanomater Interfaces [Image: see text] We studied the initial stages of Ga interaction with the Cu(001) surface and environment-induced surface transformations in an attempt to elucidate the surface chemistry of the Cu–Ga catalysts recently proposed for CO(2) hydrogenation to methanol. The results show that Ga readily intermixes with Cu upon deposition in vacuum. However, even traces of oxygen in the gas ambient cause Ga oxidation and the formation of two-dimensional (“monolayer”) Ga oxide islands uniformly covering the Cu surface. The surface morphology and the oxidized state of Ga remain in H(2) as well as in a CO(2) + H(2) reaction mixture at elevated pressures and temperatures (0.2 mbar, 700 K). The results indicate that the Ga-doped Cu surface under reaction conditions exposes a variety of structures including GaO(x)/Cu interfacial sites, which must be taken into account for elucidating the reaction mechanism. American Chemical Society 2021-01-06 2021-01-21 /pmc/articles/PMC7830109/ /pubmed/33510828 http://dx.doi.org/10.1021/acs.jpcc.0c09382 Text en © 2021 The Authors. Published by American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Zhong, Jian-Qiang Shaikhutdinov, Shamil Roldan Cuenya, Beatriz Structural Evolution of Ga–Cu Model Catalysts for CO(2) Hydrogenation Reactions |
title | Structural Evolution of Ga–Cu Model Catalysts
for CO(2) Hydrogenation Reactions |
title_full | Structural Evolution of Ga–Cu Model Catalysts
for CO(2) Hydrogenation Reactions |
title_fullStr | Structural Evolution of Ga–Cu Model Catalysts
for CO(2) Hydrogenation Reactions |
title_full_unstemmed | Structural Evolution of Ga–Cu Model Catalysts
for CO(2) Hydrogenation Reactions |
title_short | Structural Evolution of Ga–Cu Model Catalysts
for CO(2) Hydrogenation Reactions |
title_sort | structural evolution of ga–cu model catalysts
for co(2) hydrogenation reactions |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7830109/ https://www.ncbi.nlm.nih.gov/pubmed/33510828 http://dx.doi.org/10.1021/acs.jpcc.0c09382 |
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