Quantitative Effect of Zr Content on the Structure and Water–Gas Shift Reaction Activities of Gold Supported on Ceria–Zirconia
Effect of Zr content on the structure and water–gas shift reaction catalytic activities of Au-CeO2-ZrO2 catalysts were quantitatively analyzed in detail. For the low ZrO2 content (0–15 wt. %), the Ce-Zr-O solid solutions were formed through the substitutional incorporation of Zr...
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doaj-26f92335dc9e4ba7803a77f1daa4c9e82020-11-24T20:49:46ZengMDPI AGCrystals2073-43522018-06-018726110.3390/cryst8070261cryst8070261Quantitative Effect of Zr Content on the Structure and Water–Gas Shift Reaction Activities of Gold Supported on Ceria–ZirconiaLi Song0Longfeng Zhu1Lei Li2College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, ChinaCollege of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, ChinaEffect of Zr content on the structure and water–gas shift reaction catalytic activities of Au-CeO2-ZrO2 catalysts were quantitatively analyzed in detail. For the low ZrO2 content (0–15 wt. %), the Ce-Zr-O solid solutions were formed through the substitutional incorporation of Zr cations into CeO2 lattice, resulting in the contraction of cell parameters a and d-spacing (i.e., lattice distortion) and the increase of microstrain and oxygen vacancies. Quantitatively, the enhanced WGS activities have good linear correlation with the cell parameters a, microstrain, Raman shift and oxygen vacancies. Whereas, for the rich-zirconia (45 wt. %) sample, Au-CeZr-45 has some isolated t-ZrO2 and fluorite CeO2 instead of solid solution. The isolated t-ZrO2 crystallites block the contact between Au and CeO2, resulting in the agglomeration of gold clusters and, as a consequence, poor WGS activity of Au-CeZr-45 catalyst.http://www.mdpi.com/2073-4352/8/7/261gas shiftgold catalystCeO2ZrO2 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Li Song Longfeng Zhu Lei Li |
spellingShingle |
Li Song Longfeng Zhu Lei Li Quantitative Effect of Zr Content on the Structure and Water–Gas Shift Reaction Activities of Gold Supported on Ceria–Zirconia Crystals gas shift gold catalyst CeO2 ZrO2 |
author_facet |
Li Song Longfeng Zhu Lei Li |
author_sort |
Li Song |
title |
Quantitative Effect of Zr Content on the Structure and Water–Gas Shift Reaction Activities of Gold Supported on Ceria–Zirconia |
title_short |
Quantitative Effect of Zr Content on the Structure and Water–Gas Shift Reaction Activities of Gold Supported on Ceria–Zirconia |
title_full |
Quantitative Effect of Zr Content on the Structure and Water–Gas Shift Reaction Activities of Gold Supported on Ceria–Zirconia |
title_fullStr |
Quantitative Effect of Zr Content on the Structure and Water–Gas Shift Reaction Activities of Gold Supported on Ceria–Zirconia |
title_full_unstemmed |
Quantitative Effect of Zr Content on the Structure and Water–Gas Shift Reaction Activities of Gold Supported on Ceria–Zirconia |
title_sort |
quantitative effect of zr content on the structure and water–gas shift reaction activities of gold supported on ceria–zirconia |
publisher |
MDPI AG |
series |
Crystals |
issn |
2073-4352 |
publishDate |
2018-06-01 |
description |
Effect of Zr content on the structure and water–gas shift reaction catalytic activities of Au-CeO2-ZrO2 catalysts were quantitatively analyzed in detail. For the low ZrO2 content (0–15 wt. %), the Ce-Zr-O solid solutions were formed through the substitutional incorporation of Zr cations into CeO2 lattice, resulting in the contraction of cell parameters a and d-spacing (i.e., lattice distortion) and the increase of microstrain and oxygen vacancies. Quantitatively, the enhanced WGS activities have good linear correlation with the cell parameters a, microstrain, Raman shift and oxygen vacancies. Whereas, for the rich-zirconia (45 wt. %) sample, Au-CeZr-45 has some isolated t-ZrO2 and fluorite CeO2 instead of solid solution. The isolated t-ZrO2 crystallites block the contact between Au and CeO2, resulting in the agglomeration of gold clusters and, as a consequence, poor WGS activity of Au-CeZr-45 catalyst. |
topic |
gas shift gold catalyst CeO2 ZrO2 |
url |
http://www.mdpi.com/2073-4352/8/7/261 |
work_keys_str_mv |
AT lisong quantitativeeffectofzrcontentonthestructureandwatergasshiftreactionactivitiesofgoldsupportedonceriazirconia AT longfengzhu quantitativeeffectofzrcontentonthestructureandwatergasshiftreactionactivitiesofgoldsupportedonceriazirconia AT leili quantitativeeffectofzrcontentonthestructureandwatergasshiftreactionactivitiesofgoldsupportedonceriazirconia |
_version_ |
1716805780236140544 |