Stable and Highly Active Single Atom Configurations for Photocatalytic H2 Generation

Wang Y, Denisov N, Qin S, Gonçalves DS, Kim H, Sarma BB, Schmuki P (2024)

Publication Type: Journal article

Publication year: 2024

Journal

DOI: 10.1002/adma.202400626

Abstract

The employment of single atoms (SAs), especially Pt SAs, as co-catalysts in photocatalytic H2 generation has gained significant attention due to their exceptional efficiency. However, a major challenge in their application is the light-induced agglomeration of these SAs into less active nanosized particles under photocatalytic conditions. This study addresses the stability and reactivity of Pt SAs on TiO2 surfaces by investigating various post-deposition annealing treatments in air, Ar, and Ar-H2 environments at different temperatures. It is described that annealing in an Ar-H2 atmosphere optimally stabilizes SA configurations, forming stable 2D rafts of assembled SAs ≈0.5–1 nm in diameter. These rafts not only resist light-induced agglomeration but also exhibit significantly enhanced H2 production efficiency. The findings reveal a promising approach to maintaining the high reactivity of Pt SAs while overcoming the critical challenge of their stability under photocatalytic conditions.

Authors with CRIS profile

Involved external institutions

Karlsruhe Institute of Technology (KIT) Germany (DE)

How to cite

APA:

Wang, Y., Denisov, N., Qin, S., Gonçalves, D.S., Kim, H., Sarma, B.B., & Schmuki, P. (2024). Stable and Highly Active Single Atom Configurations for Photocatalytic H2 Generation. Advanced Materials. https://dx.doi.org/10.1002/adma.202400626

MLA:

Wang, Yue, et al. "Stable and Highly Active Single Atom Configurations for Photocatalytic H2 Generation." Advanced Materials (2024).

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