Oxidation of Reduced Ceria by Incorporation of Hydrogen

The interaction of hydrogen with reduced ceria (CeO(2−x)) powders and CeO(2−x)(111) thin films was studied using several characterization techniques including TEM, XRD, LEED, XPS, RPES, EELS, ESR, and TDS. The results clearly indicate that both in reduced ceria powders as well as in reduced single c...

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Autores principales: Li, Zhaorui, Werner, Kristin, Qian, Kun, You, Rui, Płucienik, Agata, Jia, Aiping, Wu, Lihui, Zhang, Liyuan, Pan, Haibin, Kuhlenbeck, Helmut, Shaikhutdinov, Shamil, Huang, Weixin, Freund, Hans‐Joachim
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Research Articles
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6790607/
https://www.ncbi.nlm.nih.gov/pubmed/31403236
http://dx.doi.org/10.1002/anie.201907117
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author Li, Zhaorui
Werner, Kristin
Qian, Kun
You, Rui
Płucienik, Agata
Jia, Aiping
Wu, Lihui
Zhang, Liyuan
Pan, Haibin
Kuhlenbeck, Helmut
Shaikhutdinov, Shamil
Huang, Weixin
Freund, Hans‐Joachim
author_facet Li, Zhaorui
Werner, Kristin
Qian, Kun
You, Rui
Płucienik, Agata
Jia, Aiping
Wu, Lihui
Zhang, Liyuan
Pan, Haibin
Kuhlenbeck, Helmut
Shaikhutdinov, Shamil
Huang, Weixin
Freund, Hans‐Joachim
author_sort Li, Zhaorui
collection PubMed
description The interaction of hydrogen with reduced ceria (CeO(2−x)) powders and CeO(2−x)(111) thin films was studied using several characterization techniques including TEM, XRD, LEED, XPS, RPES, EELS, ESR, and TDS. The results clearly indicate that both in reduced ceria powders as well as in reduced single crystal ceria films hydrogen may form hydroxyls at the surface and hydride species below the surface. The formation of hydrides is clearly linked to the presence of oxygen vacancies and is accompanied by the transfer of an electron from a Ce(3+) species to hydrogen, which results in the formation of Ce(4+), and thus in oxidation of ceria.
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spelling pubmed-67906072019-10-18 Oxidation of Reduced Ceria by Incorporation of Hydrogen Li, Zhaorui Werner, Kristin Qian, Kun You, Rui Płucienik, Agata Jia, Aiping Wu, Lihui Zhang, Liyuan Pan, Haibin Kuhlenbeck, Helmut Shaikhutdinov, Shamil Huang, Weixin Freund, Hans‐Joachim Angew Chem Int Ed Engl Research Articles The interaction of hydrogen with reduced ceria (CeO(2−x)) powders and CeO(2−x)(111) thin films was studied using several characterization techniques including TEM, XRD, LEED, XPS, RPES, EELS, ESR, and TDS. The results clearly indicate that both in reduced ceria powders as well as in reduced single crystal ceria films hydrogen may form hydroxyls at the surface and hydride species below the surface. The formation of hydrides is clearly linked to the presence of oxygen vacancies and is accompanied by the transfer of an electron from a Ce(3+) species to hydrogen, which results in the formation of Ce(4+), and thus in oxidation of ceria. John Wiley and Sons Inc. 2019-09-12 2019-10-07 /pmc/articles/PMC6790607/ /pubmed/31403236 http://dx.doi.org/10.1002/anie.201907117 Text en © 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Research Articles
Li, Zhaorui
Werner, Kristin
Qian, Kun
You, Rui
Płucienik, Agata
Jia, Aiping
Wu, Lihui
Zhang, Liyuan
Pan, Haibin
Kuhlenbeck, Helmut
Shaikhutdinov, Shamil
Huang, Weixin
Freund, Hans‐Joachim
Oxidation of Reduced Ceria by Incorporation of Hydrogen
title Oxidation of Reduced Ceria by Incorporation of Hydrogen
title_full Oxidation of Reduced Ceria by Incorporation of Hydrogen
title_fullStr Oxidation of Reduced Ceria by Incorporation of Hydrogen
title_full_unstemmed Oxidation of Reduced Ceria by Incorporation of Hydrogen
title_short Oxidation of Reduced Ceria by Incorporation of Hydrogen
title_sort oxidation of reduced ceria by incorporation of hydrogen
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6790607/
https://www.ncbi.nlm.nih.gov/pubmed/31403236
http://dx.doi.org/10.1002/anie.201907117
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