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Reactive Deposition Versus Strong Electrostatic Adsorption (SEA): A Key to Highly Active Single Atom Co‐Catalysts in Photocatalytic H2 Generation

Wang, Yue; Qin, Shanshan; Denisov, Nikita; Kim, Hyesung; Bad'ura, Zdeněk; Sarma, Bidyut Bikash 1; Schmuki, Patrik
1 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)

Abstract:

In recent years, the use of single atoms (SAs) has become of a rapidly increasing significance in photocatalytic H2 generation; here SA noble metals (mainly Pt SAs) can act as highly effective co-catalysts. The classic strategy to decorate oxide semiconductor surfaces with maximally dispersed SAs relies on “strong electrostatic adsorption” (SEA) of suitable noble metal complexes. In the case of TiO2 – the classic benchmark photocatalyst – SEA calls for adsorption of cationic Pt complexes such as [(NH3)4Pt]2+ which then are thermally reacted to surface-bound SAs. While SEA is widely used in literature, in the present work it is shown by a direct comparison that reactive attachment based on the reductive anchoring of SAs, e.g., from hexachloroplatinic(IV) acid (H2PtCl6) leads directly to SAs in a configuration with a significantly higher specific activity than SAs deposited with SEA – and this at a significantly lower Pt loading and without any thermal post-deposition treatments. Overall, the work demonstrates that the reactive deposition strategy is superior to the classic SEA concept as it provides a direct electronically well-connected SA-anchoring and thus leads to highly active single-atom sites in photocatalysis.

Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 0935-9648, 1521-4095
KITopen-ID: 1000160707
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Erschienen in Advanced Materials
Verlag John Wiley and Sons
Band 35
Heft 32
Seiten Art.-Nr.: 2211814
Vorab online veröffentlicht am 31.05.2023
Schlagwörter highly reactive single-atom deposition, photocatalytic H2 generations, Pt co-catalysts, sputtered anatase layers
Nachgewiesen in Web of Science
OpenAlex
Scopus
Dimensions
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere EnergieZiel 14 – Leben unter Wasser

Verlagsausgabe §
DOI: 10.5445/IR/1000160707
Veröffentlicht am 18.07.2023
Originalveröffentlichung
DOI: 10.1002/adma.202211814
Scopus
Zitationen: 34
Web of Science
Zitationen: 30
Dimensions
Zitationen: 37
Seitenaufrufe: 80
seit 18.07.2023
Downloads: 62
seit 31.07.2023
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