Enhanced Low-Temperature Activity of CO2 Methanation Over Ni/CeO2 Catalyst

CeO 2 nanorods (CeO 2 -nrs), CeO 2 nanocubes (CeO 2 -ncs) and CeO 2 nanopolyhedrons (CeO 2 -nps) were prepared by hydrothermal method and then NiO crystallites were deposited on these supports by precipitation-deposition, respectively. The physic-chemical properties of Ni/CeO 2 catalysts were charac...

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Published in:Catalysis letters 2022-03, Vol.152 (3), p.872-882
Main Authors: Ma, Yuan, Liu, Jiao, Chu, Mo, Yue, Junrong, Cui, Yanbin, Xu, Guangwen
Format: Article
Language:English
Subjects:
Carbon dioxide
Catalysis
Catalysts
Catalytic activity
Catalytic converters
Cerium oxides
Chemical precipitation
Chemical properties
Chemistry
Chemistry and Materials Science
Crystallites
Dispersion
Industrial Chemistry/Chemical Engineering
Low temperature
Methanation
Nanorods
Organometallic Chemistry
Oxygen
Physical Chemistry
Surface area
Vacancies
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cited_by cdi_FETCH-LOGICAL-c319t-52408346fe63145ff6091b0b0850806423f1c20c85a087da70dbba59f65de44a3
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container_issue 3
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container_title Catalysis letters
container_volume 152
creator Ma, Yuan
Liu, Jiao
Chu, Mo
Yue, Junrong
Cui, Yanbin
Xu, Guangwen
description CeO 2 nanorods (CeO 2 -nrs), CeO 2 nanocubes (CeO 2 -ncs) and CeO 2 nanopolyhedrons (CeO 2 -nps) were prepared by hydrothermal method and then NiO crystallites were deposited on these supports by precipitation-deposition, respectively. The physic-chemical properties of Ni/CeO 2 catalysts were characterized and performances for carbon dioxide methanation reaction were tested. The Ni/CeO 2 -nrs sample shows well metal dispersion and high concentration of oxygen vacancy, which leads to the high catalytic activity for CO 2 methanation. Especially at 300 °C, the CO 2 conversion could reach 60%. Further analysis reveals that the content of oxygen vacancy has a positive correlation with the surface area of catalyst. The largest surface area results in the most of oxygen vacancy on the Ni/CeO 2 -nrs catalyst, and then a large amount of CO 2 could be activated at low temperatures. Meanwhile, large surface area facilitates the dispersion of active metals, and improves the degree of H 2 activation. The combined effect results in the promotion of catalytic activity for CO 2 methanation at low temperatures. Graphic Abstract CeO 2 nanorods (CeO 2 -nrs), CeO 2 nanocubes (CeO 2 -ncs) and CeO 2 nanopolyhedrons (CeO 2 -nps) supported Ni catalysts were prepared. These catalysts ware tested for CO 2 methanation and further characterized by BET, XPS, TEM, H 2 -TPR and TPD. The results showed that the content of oxygen vacancy has positive correlation with the specific surface area of catalyst.
doi_str_mv 10.1007/s10562-021-03677-7
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The physic-chemical properties of Ni/CeO 2 catalysts were characterized and performances for carbon dioxide methanation reaction were tested. The Ni/CeO 2 -nrs sample shows well metal dispersion and high concentration of oxygen vacancy, which leads to the high catalytic activity for CO 2 methanation. Especially at 300 °C, the CO 2 conversion could reach 60%. Further analysis reveals that the content of oxygen vacancy has a positive correlation with the surface area of catalyst. The largest surface area results in the most of oxygen vacancy on the Ni/CeO 2 -nrs catalyst, and then a large amount of CO 2 could be activated at low temperatures. Meanwhile, large surface area facilitates the dispersion of active metals, and improves the degree of H 2 activation. The combined effect results in the promotion of catalytic activity for CO 2 methanation at low temperatures. Graphic Abstract CeO 2 nanorods (CeO 2 -nrs), CeO 2 nanocubes (CeO 2 -ncs) and CeO 2 nanopolyhedrons (CeO 2 -nps) supported Ni catalysts were prepared. These catalysts ware tested for CO 2 methanation and further characterized by BET, XPS, TEM, H 2 -TPR and TPD. 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The physic-chemical properties of Ni/CeO 2 catalysts were characterized and performances for carbon dioxide methanation reaction were tested. The Ni/CeO 2 -nrs sample shows well metal dispersion and high concentration of oxygen vacancy, which leads to the high catalytic activity for CO 2 methanation. Especially at 300 °C, the CO 2 conversion could reach 60%. Further analysis reveals that the content of oxygen vacancy has a positive correlation with the surface area of catalyst. The largest surface area results in the most of oxygen vacancy on the Ni/CeO 2 -nrs catalyst, and then a large amount of CO 2 could be activated at low temperatures. Meanwhile, large surface area facilitates the dispersion of active metals, and improves the degree of H 2 activation. The combined effect results in the promotion of catalytic activity for CO 2 methanation at low temperatures. Graphic Abstract CeO 2 nanorods (CeO 2 -nrs), CeO 2 nanocubes (CeO 2 -ncs) and CeO 2 nanopolyhedrons (CeO 2 -nps) supported Ni catalysts were prepared. These catalysts ware tested for CO 2 methanation and further characterized by BET, XPS, TEM, H 2 -TPR and TPD. 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Graphic Abstract CeO 2 nanorods (CeO 2 -nrs), CeO 2 nanocubes (CeO 2 -ncs) and CeO 2 nanopolyhedrons (CeO 2 -nps) supported Ni catalysts were prepared. These catalysts ware tested for CO 2 methanation and further characterized by BET, XPS, TEM, H 2 -TPR and TPD. The results showed that the content of oxygen vacancy has positive correlation with the specific surface area of catalyst.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10562-021-03677-7</doi><tpages>11</tpages></addata></record>
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subjects Carbon dioxide
Catalysis
Catalysts
Catalytic activity
Catalytic converters
Cerium oxides
Chemical precipitation
Chemical properties
Chemistry
Chemistry and Materials Science
Crystallites
Dispersion
Industrial Chemistry/Chemical Engineering
Low temperature
Methanation
Nanorods
Organometallic Chemistry
Oxygen
Physical Chemistry
Surface area
Vacancies
title Enhanced Low-Temperature Activity of CO2 Methanation Over Ni/CeO2 Catalyst
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