Fluorine Aided Stabilization of Pt Single Atoms on TiO2Nanosheets and Strongly Enhanced Photocatalytic H2Evolution

Wu S, Hwang I, Osuagwu B, Will J, Wu Z, Sarma BB, Pu FF, Wang LY, Badura Z, Zoppellaro G, Spiecker E, Schmuki P (2022)

Publication Type: Journal article

Publication year: 2022

Journal

ACS Catalysis American Chemical Society

Pages Range: 33-41

DOI: 10.1021/acscatal.2c04481

Abstract

Trapping sites in single atom (SA) catalysts are critical to the stabilization and reactivity of isolated atoms. Herein, we show that anchoring of Pt SAs on TiO2 nanosheets is strongly aided by lattice incorporated fluorine species. Tailoring the speciation of fluorine on TiO2 nanosheets is a key factor for uniform and stable dispersion of the Pt SAs and high efficiency in Pt SA co-catalyzed photocatalytic H2 production. Fluorine-stabilized uniformly dispersed Pt SAs on the (001) surface of TiO2 can provide a remarkable photocatalytic activity (a H2 production rate of 45.3 mmol h-1 mg-1 Pt for 65 mW/cm2 365 nm light). This high (maximized) efficiency can be achieved with a remarkably low loading amount of Pt SAs on TiO2 nanosheets (0.03 wt %), which is far superior to Pt nanoparticles on a TiO2 nanosheet with the same or a higher loading amount. F-stabilized Pt SAs on TiO2 nanosheets also exhibit an excellent stability in long-term photocatalytic reactions.

Authors with CRIS profile

Imgon Hwang Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Emeka Benedict Osuagwu Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Johannes Will Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Zhenni Wu Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Involved external institutions

Karlsruhe Institute of Technology (KIT) DE Germany (DE) Wuhan University of Technology CN China (CN) Chinese Academy of Sciences / 中国科学院 CN China (CN) Palacky University Olomouc / Univerzita Palackého v Olomouci CZ Czech Republic (CZ)

How to cite

APA:

Wu, S., Hwang, I., Osuagwu, B., Will, J., Wu, Z., Sarma, B.B.,... Schmuki, P. (2022). Fluorine Aided Stabilization of Pt Single Atoms on TiO2Nanosheets and Strongly Enhanced Photocatalytic H2Evolution. ACS Catalysis, 33-41. https://dx.doi.org/10.1021/acscatal.2c04481

MLA:

Wu, Siming, et al. "Fluorine Aided Stabilization of Pt Single Atoms on TiO2Nanosheets and Strongly Enhanced Photocatalytic H2Evolution." ACS Catalysis (2022): 33-41.

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