Catalytic performance of Ru nanoparticles supported on different mesoporous silicas for preferential oxidation of CO in H-2-rich atmosphere

Wang, Li, Chen, Jiuling, Patel, Archana, Rudolph, Victor and Zhu, Zhonghua (2012) Catalytic performance of Ru nanoparticles supported on different mesoporous silicas for preferential oxidation of CO in H-2-rich atmosphere. Applied Catalysis A-General, 447 200-209. doi:10.1016/j.apcata.2012.09.044


Author Wang, Li
Chen, Jiuling
Patel, Archana
Rudolph, Victor
Zhu, Zhonghua
Title Catalytic performance of Ru nanoparticles supported on different mesoporous silicas for preferential oxidation of CO in H-2-rich atmosphere
Formatted title
Catalytic performance of Ru nanoparticles supported on different mesoporous silicas for preferential oxidation of CO in H2-rich atmosphere
Journal name Applied Catalysis A-General   Check publisher's open access policy
ISSN 0926-860X
1873-3875
Publication date 2012-12-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.apcata.2012.09.044
Open Access Status DOI
Volume 447
Start page 200
End page 209
Total pages 10
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Language eng
Subject 1503 Catalysis
1508 Process Chemistry and Technology
Abstract Ru catalysts supported on different mesoporous silicas, MCM-41, MCM-48, SBA-15 and KIT-6, were applied to the preferential oxidation of CO in a H-2-rich atmosphere (PROX). The properties of mesoporous support and the supported Ru catalysts were investigated using N-2 physisorption, FTIR, TEM. CO chemisorption, H-2-TPR and XPS. The performance of Ru catalysts in PROX highly relates to the Ru dispersion, support pore structure, Ru reducibility and the interaction between Ru and support. Ru/KIT-6 presents the highest surface activity (TOF values), owing to the easiest reducibility of Ru. Nevertheless, its poor Ru dispersion results in a low number of surface active sites, leading to the low CO conversion value over Ru/KIT-6. Ru/MCM-41 can achieve full CO conversion and the high CO2 selectivity in the reaction temperature range of 115-180 degrees C owing to the high Ru dispersion from the strong interaction between Ru and MCM-41. (C) 2012 Elsevier B.V. All rights reserved.
Formatted abstract
Ru catalysts supported on different mesoporous silicas, MCM-41, MCM-48, SBA-15 and KIT-6, were applied to the preferential oxidation of CO in a H 2-rich atmosphere (PROX). The properties of mesoporous support and the supported Ru catalysts were investigated using N2 physisorption, FTIR, TEM, CO chemisorption, H2-TPR and XPS. The performance of Ru catalysts in PROX highly relates to the Ru dispersion, support pore structure, Ru reducibility and the interaction between Ru and support. Ru/KIT-6 presents the highest surface activity (TOF values), owing to the easiest reducibility of Ru. Nevertheless, its poor Ru dispersion results in a low number of surface active sites, leading to the low CO conversion value over Ru/KIT-6. Ru/MCM-41 can achieve full CO conversion and the high CO2 selectivity in the reaction temperature range of 115-180 °C owing to the high Ru dispersion from the strong interaction between Ru and MCM-41.
Keyword CO2 selectivity
Mesoporous silica
Ru dispersion
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2013 Collection
 
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