Promotional effect of Ti on mesoporous silica-supported Ru catalysts for CO2 methanation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00142963" target="_blank" >RIV/00216224:14310/25:00142963 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2468519425005166?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2468519425005166?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mtchem.2025.103026" target="_blank" >10.1016/j.mtchem.2025.103026</a>
Alternative languages
Result language
angličtina
Original language name
Promotional effect of Ti on mesoporous silica-supported Ru catalysts for CO2 methanation
Original language description
Understanding the role of metal promoter in CO2 methanation is essential for advancing catalyst design and developing efficient methanation catalysts. Herein, a series of mesoporous Ti-promoted silica materials with different Ti-loadings was synthesized via the aerosol-assisted sol-gel process. These materials possess a spherical morphology with high specific surface area and homogeneous distribution of dispersed Ti species, even at Tiloading as high as 16 mol%, thus allowing to investigate the role of Ti as a promoter in silica-supported Ru CO2 methanation catalysts. Keeping the Ru loading constant, higher Ti loadings (up to 12 mol%) lead to superior catalytic activity in CO2 methanation. At 300 degrees C, the CH4 formation rate of Ru/12 %Ti-SiO2 catalyst (198 mu molCH4gRu - 1s- 1) is 2.3 times higher than that of unpromoted Ru/SiO2 catalyst (88 mu molCH4gRu - 1s- 1). The improved activity correlates well with the smaller crystallite size of RuO2 nanoparticles, which translates to higher Ru dispersion after reductive treatment with H2. Overall, Ti helps stabilize Ru species and impedes crystal growth. With a Ti loading of 12 mol%, the crystallization of small anatase TiO2 is induced after RuO2 impregnation and during subsequent calcination, in turn forming the interfacial contact between Ru and TiO2 after H2 reduction. In-situ DRIFTS suggests that the promotion of CO2 activation and CO adsorption at these interfacial sites is responsible for the enhanced catalytic activity in Ti-promoted Ru-SiO2 methanation catalyst.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
<a href="/en/project/EF18_046%2F0015974" target="_blank" >EF18_046/0015974: Upgrading Czech Infrastructure for Integrative Structural Biology</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials Today Chemistry
ISSN
2468-5194
e-ISSN
2468-5194
Volume of the periodical
49
Issue of the periodical within the volume
OCT
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
1-11
UT code for WoS article
001571771100002
EID of the result in the Scopus database
2-s2.0-105015531713