Kristijan Lorber (Avtor), Iztok Arčon (Avtor), Matej Huš (Avtor), Janez Zavašnik (Avtor), Jordi Sancho-Parramon (Avtor), Anže Prašnikar (Avtor), Blaž Likozar (Avtor), Nataša Novak Tušar (Avtor), Petar Djinović (Avtor)

Povzetek

The reverse water gas shift (RWGS) reaction converts CO2 and H2 into CO and water. We investigated Cu/γ-Al2O3 catalysts in both thermally driven and light-assisted RWGS reactions using visible light. When driven by combined visible light and thermal energy, the CO2 conversion rates were lower than in the dark. Light-assisted reactions showed an increase in the apparent activation energy from 68 to 87 kJ/mol, indicating that light disrupts the energetically favorable pathway active in the dark. A linear correlation between irradiance and decreasing reaction rate suggests a photon-driven phenomenon. In situ diffuse reflectance infrared Fourier transform spectroscopy and TD-DFT analyses revealed that catalyst illumination causes significant, partly irreversible surface dehydroxylation, highlighting the importance of OH groups in the most favorable RWGS pathway. This study offers a novel approach to manipulate surface species and control activity in the RWGS reaction.

Ključne besede

kataliza;vidna svetloba;reakcije;spektroskopija;baker;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: KI - Kemijski inštitut
Založnik: American Chemical Society
UDK: 544.3/.4
COBISS: 218386947 Povezava se bo odprla v novem oknu
ISSN: 1944-8252
Št. ogledov: 80
Št. prenosov: 0
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarni naslov: Light-Assisted Catalysis and the Dynamic Nature of Surface Species in the Reverse Water Gas Shift Reaction over Cu/γ-Al2O3
Sekundarne ključne besede: Katalizatorji;Baker;Kemijske reakcije;Elektromagnetno valovanje;Kataliza;Spektroskopija;
Vrsta dela (COBISS): Delo ni kategorizirano
Komentar vira: Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Iztok Arčon, Matej Huš, Janez Zavašnik, Anže Prašnikar, Blaž Likozar, Nataša Novak Tušar, Petar Djinović; Opis vira z dne 10. 12. 2024;
Strani: str. 67788–67790
Letnik: ǂVol. ǂ16
Zvezek: ǂiss. ǂ49
Čas izdaje: Dec. 11, 2024
DOI: 10.1021/acsami.4c15849
ID: 25639219