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The most active Cu facet for low-temperature water gas shift reaction

Identification of the active site is important in developing rational design strategies for solid catalysts but is seriously blocked by their structural complexity. Here, we use uniform Cu nanocrystals synthesized by a morphology-preserved reduction of corresponding uniform Cu(2)O nanocrystals in or...

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Autores principales: Zhang, Zhenhua, Wang, Sha-Sha, Song, Rui, Cao, Tian, Luo, Liangfeng, Chen, Xuanye, Gao, Yuxian, Lu, Jiqing, Li, Wei-Xue, Huang, Weixin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5591213/
https://www.ncbi.nlm.nih.gov/pubmed/28887563
http://dx.doi.org/10.1038/s41467-017-00620-6
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author Zhang, Zhenhua
Wang, Sha-Sha
Song, Rui
Cao, Tian
Luo, Liangfeng
Chen, Xuanye
Gao, Yuxian
Lu, Jiqing
Li, Wei-Xue
Huang, Weixin
author_facet Zhang, Zhenhua
Wang, Sha-Sha
Song, Rui
Cao, Tian
Luo, Liangfeng
Chen, Xuanye
Gao, Yuxian
Lu, Jiqing
Li, Wei-Xue
Huang, Weixin
author_sort Zhang, Zhenhua
collection PubMed
description Identification of the active site is important in developing rational design strategies for solid catalysts but is seriously blocked by their structural complexity. Here, we use uniform Cu nanocrystals synthesized by a morphology-preserved reduction of corresponding uniform Cu(2)O nanocrystals in order to identify the most active Cu facet for low-temperature water gas shift (WGS) reaction. Cu cubes enclosed with {100} facets are very active in catalyzing the WGS reaction up to 548 K while Cu octahedra enclosed with {111} facets are inactive. The Cu–Cu suboxide (Cu(x)O, x ≥ 10) interface of Cu(100) surface is the active site on which all elementary surface reactions within the catalytic cycle proceed smoothly. However, the formate intermediate was found stable at the Cu–Cu(x)O interface of Cu(111) surface with consequent accumulation and poisoning of the surface at low temperatures. Thereafter, Cu cubes-supported ZnO catalysts are successfully developed with extremely high activity in low-temperature WGS reaction.
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spelling pubmed-55912132017-09-11 The most active Cu facet for low-temperature water gas shift reaction Zhang, Zhenhua Wang, Sha-Sha Song, Rui Cao, Tian Luo, Liangfeng Chen, Xuanye Gao, Yuxian Lu, Jiqing Li, Wei-Xue Huang, Weixin Nat Commun Article Identification of the active site is important in developing rational design strategies for solid catalysts but is seriously blocked by their structural complexity. Here, we use uniform Cu nanocrystals synthesized by a morphology-preserved reduction of corresponding uniform Cu(2)O nanocrystals in order to identify the most active Cu facet for low-temperature water gas shift (WGS) reaction. Cu cubes enclosed with {100} facets are very active in catalyzing the WGS reaction up to 548 K while Cu octahedra enclosed with {111} facets are inactive. The Cu–Cu suboxide (Cu(x)O, x ≥ 10) interface of Cu(100) surface is the active site on which all elementary surface reactions within the catalytic cycle proceed smoothly. However, the formate intermediate was found stable at the Cu–Cu(x)O interface of Cu(111) surface with consequent accumulation and poisoning of the surface at low temperatures. Thereafter, Cu cubes-supported ZnO catalysts are successfully developed with extremely high activity in low-temperature WGS reaction. Nature Publishing Group UK 2017-09-08 /pmc/articles/PMC5591213/ /pubmed/28887563 http://dx.doi.org/10.1038/s41467-017-00620-6 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhang, Zhenhua
Wang, Sha-Sha
Song, Rui
Cao, Tian
Luo, Liangfeng
Chen, Xuanye
Gao, Yuxian
Lu, Jiqing
Li, Wei-Xue
Huang, Weixin
The most active Cu facet for low-temperature water gas shift reaction
title The most active Cu facet for low-temperature water gas shift reaction
title_full The most active Cu facet for low-temperature water gas shift reaction
title_fullStr The most active Cu facet for low-temperature water gas shift reaction
title_full_unstemmed The most active Cu facet for low-temperature water gas shift reaction
title_short The most active Cu facet for low-temperature water gas shift reaction
title_sort most active cu facet for low-temperature water gas shift reaction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5591213/
https://www.ncbi.nlm.nih.gov/pubmed/28887563
http://dx.doi.org/10.1038/s41467-017-00620-6
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