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

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

© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 32 vom: 01. Aug., Seite e2211814
1. Verfasser: Wang, Yue (VerfasserIn)
Weitere Verfasser: Qin, Shanshan, Denisov, Nikita, Kim, Hyesung, Bad'ura, Zdeněk, Sarma, Bidyut Bikash, Schmuki, Patrik
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article Pt co-catalysts highly reactive single-atom deposition photocatalytic H2 generations sputtered anatase layers
Beschreibung
Zusammenfassung:© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.
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 )4 Pt]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 (H2 PtCl6 ) 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
Beschreibung:Date Revised 11.08.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202211814