Regulating protonation paths for enhanced photocatalytic CO2 methanation by coupling Pt sites on WO2.9/TiO2

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Regulating protonation paths for enhanced photocatalytic CO2 methanation by coupling Pt sites on WO2.9/TiO2

Popis výsledku v původním jazyce

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 -&gt; COOH+ -&gt; *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.

Název v anglickém jazyce

Regulating protonation paths for enhanced photocatalytic CO2 methanation by coupling Pt sites on WO2.9/TiO2

Popis výsledku anglicky

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 -&gt; COOH+ -&gt; *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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Catalysis Science &amp; Technology

ISSN

2044-4753

e-ISSN

2044-4761

Svazek periodika

15

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

4002-4011

Kód UT WoS článku

001501454100001

EID výsledku v databázi Scopus

2-s2.0-105007861479