Platinum Single Atoms Strongly Promote Superoxide Formation in Titania-Based Photocatalysis – Platinum Nanoparticles Don't

Wang Y, Wu S, Zoppellaro G, Baďura Z, Schmuki P (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Small Wiley-VCH Verlag

DOI: 10.1002/smll.202412097

Abstract

The selective reduction of molecular oxygen to superoxide is one of the key reactions in electrochemistry and photocatalysis. Here the effect of Pt co-catalysts, dispersed on titania, either as single atoms or as nanoparticles, on the photocatalytic superoxide (•O2−) formation in O2 containing solutions is investigated. The •O2− formation is traced by nitroblue tetrazolium (NBT) assays and in detail by EPR measurements using TEMPO as •O2− radical scavenger. The results show that the photocatalytic formation rate of •O2− on titania can strongly be enhanced by using Pt single atoms as a co-catalyst, whereas Pt nanoparticles hardly exhibit any accelerating effect. This finding is of considerable significance regarding photocatalytic degradation and photocatalytic oxidative synthesis processes.

Authors with CRIS profile

Yue Wang Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO) Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO)

Additional Organisation(s)

Nanoanalysis and Electron Microscopy (CENEM) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Involved external institutions

Palacky University Olomouc / Univerzita Palackého v Olomouci CZ Czech Republic (CZ)

How to cite

APA:

Wang, Y., Wu, S., Zoppellaro, G., Baďura, Z., & Schmuki, P. (2025). Platinum Single Atoms Strongly Promote Superoxide Formation in Titania-Based Photocatalysis – Platinum Nanoparticles Don't. Small. https://doi.org/10.1002/smll.202412097

MLA:

Wang, Yue, et al. "Platinum Single Atoms Strongly Promote Superoxide Formation in Titania-Based Photocatalysis – Platinum Nanoparticles Don't." Small (2025).

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