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Structure-Activity Relationship of Ceria Based Catalyst for Hydrogen Production
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Document Title
Structure-Activity Relationship of Ceria Based Catalyst for Hydrogen Production
Author
Lomonaco JG, Tojira O, Charojrochkul S, Tepamatr P
Name from Authors Collection
Affiliations
Thammasat University; National Science & Technology Development Agency - Thailand
Type
Article
Source Title
CHIANG MAI JOURNAL OF SCIENCE
ISSN
0125-2526
Year
2022
Volume
49
Issue
4
Open Access
Bronze
Publisher
CHIANG MAI UNIV, FAC SCIENCE
DOI
10.12982/CMJS.2022.043
Format
Abstract
The role of Sm addition on water gas shift performance of Re/ceria was studied. A redox cycle between Ce4+ and Ce3+ of ceria support by oxygen vacancies generation is one of the elementary step in water gas shift mechanism. In this work, we have attempted to enrich the Ce3+ content at the ceria surface of Re/doped ceria to enhance the water gas shift performance. The water gas shift reaction was carried out over Re/Sm-doped ceria catalysts with different contents of Sm (0, 5, 10, 15 wt%). The H-2-TPR explained the activity enhancement of these catalysts due to Sm addition which have lowered the reduction temperature of rhenium oxide species and promoted the surface of ceria. The results of water gas shift activity investigation presented that the activity of 1%Re/Ce10%SmO was higher than that of other catalysts. The influence of Sm on increasing the catalytic activity of Re catalysts is concluded to be from enhancing the Ce3+ content which then facilitate the redox process at the surface.
Keyword
ceria surface | mixed oxide support | rhenium | water gas shift activity
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
Faculty of Science and Technology, Thammasat University [SciGR 10/2564]; Thammasat University Research Unit in smart materials from biomass and Thailand Graduate Institute of Science and Technology (TGIST) [SCA-CO- 2021-14622-TH]
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Copyright
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Publication Source
WOS