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Heterostructure Engineering of a Reverse Water Gas Shift Photocatalyst

Wang, H.; Jia, J.; Wang, L.; Butler, K.; Song, R.; Casillas, G.; He, L.; Kherani, N. P.; Perovic, D. D.; Jing, L.; Walsh, A.; Dittmeyer, R.; Ozin, G. A.

To achieve substantial reductions in CO2 emissions, catalysts for the photoreduction of CO2 into value‐added chemicals and fuels will most likely be at the heart of key renewable‐energy technologies. Despite tremendous efforts, developing highly active and selective CO2 reduction photocatalysts remains a great challenge. Herein, a metal oxide heterostructure engineering strategy that enables the gas‐phase, photocatalytic, heterogeneous hydrogenation of CO2 to CO with high performance metrics (i.e., the conversion rate of CO2 to CO reached as high as 1400 µmol g cat−1 h−1) is reported. The catalyst is comprised of indium oxide nanocrystals, In2O3−x(OH)y, nucleated and grown on the surface of niobium pentoxide (Nb2O5) nanorods. The heterostructure between In2O3−x(OH)y nanocrystals and the Nb2O5 nanorod support increases the concentration of oxygen vacancies and prolongs excited state (electron and hole) lifetimes. Together, these effects result in a dramatically improved photocatalytic performance compared to the isolated In2O3−x(OH)y material. The defect optimized heterostructure exhibits a 44‐fold higher conversion rate than pristine In2O3−x(OH)y. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000099632
Veröffentlicht am 04.12.2019
DOI: 10.1002/advs.201902170
Zitationen: 7
Web of Science
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikroverfahrenstechnik (IMVT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2198-3844
KITopen-ID: 1000099632
HGF-Programm 37.03.02 (POF III, LK 01) Components and Process Development
Erschienen in Advanced science
Verlag Wiley Open Access
Band 6
Seiten Art.-Nr.: 1902170
Vorab online veröffentlicht am 04.10.2019
Nachgewiesen in Web of Science
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