Regulating protonation paths for enhanced photocatalytic CO2 methanation by coupling Pt sites on WO2.9/TiO2
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73631169" target="_blank" >RIV/61989592:15640/25:73631169 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2025/cy/d5cy00167f" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2025/cy/d5cy00167f</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d5cy00167f" target="_blank" >10.1039/d5cy00167f</a>
Alternative languages
Result language
angličtina
Original language name
Regulating protonation paths for enhanced photocatalytic CO2 methanation by coupling Pt sites on WO2.9/TiO2
Original language description
CO2 methanation via photocatalysis with water vapor is a sustainable technique for reducing CO2 emission but is challenged by the high energy barrier associated with the initial adsorption, activation and protonation of CO2 molecules. In this work, a substoichiometric WO2.9 thin film with strong Lewis acidity was coated on TiO2 microspheres, followed by the deposition of Pt cocatalysts on WO2.9 with controlled Pt single atoms and clusters (Pt-WO2.9/TiO2). The methane production rate reached 10.74 mu mol h-1 g-1 with a selectivity of 99.8%, which was similar to 40 times higher than that of bare TiO2 (0.27 mu mol h-1 g-1). The high methane production rate was attributed to the synergy of Pt sites on the WO2.9/TiO2 heterojunction, where the Pt clusters facilitated water dissociation, thereby providing H* through hydrogen spillover on the surface, and the presence of a substoichiometric WO2.9 surface further enhanced the spillover process. The high density of active H* promoted the protonation pathway for CO2 activation (CO2 -> COOH+ -> *COOH), which improved the adsorption of the essential intermediate *CO on Pt single atoms and displayed a significantly reduced energy barrier for the protonation reaction of C1 intermediates, resulting in a mixed reaction pathway. This work provides new insights into a mechanism to regulate the reaction path to facilitate efficient photocatalytic CO2 methanation.
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
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
Project
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Continuities
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
Catalysis Science & Technology
ISSN
2044-4753
e-ISSN
2044-4761
Volume of the periodical
15
Issue of the periodical within the volume
13
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
4002-4011
UT code for WoS article
001501454100001
EID of the result in the Scopus database
2-s2.0-105007861479