Influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline Ce(OH)CO3 precursor
A high yield green method was developed for the preparation of reactive nanotextured ceria (CeO2). The preparation method is based on the oxidation of a crystalline Ce(OH)CO3 precursor that decompose at relative low temperature (ca. 250 °C) yielding CeO2 nanocrystals initially rich in Ce3+. After in...
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paper:paper_03603199_v36_n24_p15899_Poggio2023-06-08T15:34:39Z Influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline Ce(OH)CO3 precursor Jobbagy, Matias Catalysts COPROX Hydrogen purification Supports Calcination temperature Cell contraction CO-PROX Differential reactors Green method High yield Hydrogen purification Low temperatures Nano-ceria Nanotextured Optimum activity Preparation method Surface process Temperature range Calcination temperature CO-PROX Co-prox reactions Differential reactors Hydrogen purification Low temperatures Preparation method Temperature range Catalyst activity Catalyst supports Catalysts Cerium Cerium compounds Crystal growth Crystalline materials Hydrogen Monolayers Catalyst activity Catalyst supports Catalysts Crystalline materials Temperature Calcination Calcination A high yield green method was developed for the preparation of reactive nanotextured ceria (CeO2). The preparation method is based on the oxidation of a crystalline Ce(OH)CO3 precursor that decompose at relative low temperature (ca. 250 °C) yielding CeO2 nanocrystals initially rich in Ce3+. After increasing calcination temperatures (in the range 350-650 °C), PXRD analysis show a slight crystal growth after calcination temperatures up to 550 °C, however cell contraction in such case denotes the definitive oxidation of remnant Ce3+ centers. XPS results confirm Ce3+ fraction diminution as calcination temperature increases. TPR profiles of ceria samples show two reduction events being the low temperature one (at ca. 500 °C) related to a surface process in which approximately only one cerium monolayer is involved. Catalytic activity tests for COPROX reaction were performed under differential reactor conditions to evaluate their activity in the temperature range 100-300 °C. The optimum activity recorded for the sample calcined at 450 °C accounts for the compromise between oxide's activation and surface preservation. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. Fil:Jobbágy, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03603199_v36_n24_p15899_Poggio http://hdl.handle.net/20.500.12110/paper_03603199_v36_n24_p15899_Poggio |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Catalysts COPROX Hydrogen purification Supports Calcination temperature Cell contraction CO-PROX Differential reactors Green method High yield Hydrogen purification Low temperatures Nano-ceria Nanotextured Optimum activity Preparation method Surface process Temperature range Calcination temperature CO-PROX Co-prox reactions Differential reactors Hydrogen purification Low temperatures Preparation method Temperature range Catalyst activity Catalyst supports Catalysts Cerium Cerium compounds Crystal growth Crystalline materials Hydrogen Monolayers Catalyst activity Catalyst supports Catalysts Crystalline materials Temperature Calcination Calcination |
| spellingShingle |
Catalysts COPROX Hydrogen purification Supports Calcination temperature Cell contraction CO-PROX Differential reactors Green method High yield Hydrogen purification Low temperatures Nano-ceria Nanotextured Optimum activity Preparation method Surface process Temperature range Calcination temperature CO-PROX Co-prox reactions Differential reactors Hydrogen purification Low temperatures Preparation method Temperature range Catalyst activity Catalyst supports Catalysts Cerium Cerium compounds Crystal growth Crystalline materials Hydrogen Monolayers Catalyst activity Catalyst supports Catalysts Crystalline materials Temperature Calcination Calcination Jobbagy, Matias Influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline Ce(OH)CO3 precursor |
| topic_facet |
Catalysts COPROX Hydrogen purification Supports Calcination temperature Cell contraction CO-PROX Differential reactors Green method High yield Hydrogen purification Low temperatures Nano-ceria Nanotextured Optimum activity Preparation method Surface process Temperature range Calcination temperature CO-PROX Co-prox reactions Differential reactors Hydrogen purification Low temperatures Preparation method Temperature range Catalyst activity Catalyst supports Catalysts Cerium Cerium compounds Crystal growth Crystalline materials Hydrogen Monolayers Catalyst activity Catalyst supports Catalysts Crystalline materials Temperature Calcination Calcination |
| description |
A high yield green method was developed for the preparation of reactive nanotextured ceria (CeO2). The preparation method is based on the oxidation of a crystalline Ce(OH)CO3 precursor that decompose at relative low temperature (ca. 250 °C) yielding CeO2 nanocrystals initially rich in Ce3+. After increasing calcination temperatures (in the range 350-650 °C), PXRD analysis show a slight crystal growth after calcination temperatures up to 550 °C, however cell contraction in such case denotes the definitive oxidation of remnant Ce3+ centers. XPS results confirm Ce3+ fraction diminution as calcination temperature increases. TPR profiles of ceria samples show two reduction events being the low temperature one (at ca. 500 °C) related to a surface process in which approximately only one cerium monolayer is involved. Catalytic activity tests for COPROX reaction were performed under differential reactor conditions to evaluate their activity in the temperature range 100-300 °C. The optimum activity recorded for the sample calcined at 450 °C accounts for the compromise between oxide's activation and surface preservation. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. |
| author |
Jobbagy, Matias |
| author_facet |
Jobbagy, Matias |
| author_sort |
Jobbagy, Matias |
| title |
Influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline Ce(OH)CO3 precursor |
| title_short |
Influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline Ce(OH)CO3 precursor |
| title_full |
Influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline Ce(OH)CO3 precursor |
| title_fullStr |
Influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline Ce(OH)CO3 precursor |
| title_full_unstemmed |
Influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline Ce(OH)CO3 precursor |
| title_sort |
influence of the calcination temperature on the structure and reducibility of nanoceria obtained from crystalline ce(oh)co3 precursor |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03603199_v36_n24_p15899_Poggio http://hdl.handle.net/20.500.12110/paper_03603199_v36_n24_p15899_Poggio |
| work_keys_str_mv |
AT jobbagymatias influenceofthecalcinationtemperatureonthestructureandreducibilityofnanoceriaobtainedfromcrystallineceohco3precursor |
| _version_ |
1768544366722285568 |