A facile “dark”-deposition approach for Pt single‐atom trapping on facetted anatase TiO2 nanoflakes and use in photocatalytic H2 generation

Cha G, Mazare AV, Hwang I, Denisov N, Will J, Yokosawa T, Badura Z, Zoppellaro G, Tesler A, Spiecker E, Schmuki P (2022)


Publication Type: Journal article

Publication year: 2022

Journal

Book Volume: 412

Pages Range: 140129

Article Number: 140129

DOI: 10.1016/j.electacta.2022.140129

Abstract

In recent years, single-atom (SA) catalysts have become strongly investigated in electrocatalysis and increasingly also in photocatalysis. Here we demonstrate that single-crystalline anatase TiO2 nanoflake (NF) layers after a facile thermal air annealing process provide suitable anchoring sites for Pt SAs. Remarkably, such air annealed (001) faceted single-crystalline TiO2 nanoflakes can trap and stabilize Pt SAs and assemblies when immersed into a Pt precursor solution for sufficient time in absence of any illumination, i.e., under "dark deposition” conditions. These decorated species act as more efficient co-catalysts for the H2 evolution reaction, compared to the classical Pt nanoparticles (NPs). Here we show that such single-crystal-based TiO2 photocatalyst, decorated with Pt SAs, can display a 4-fold increase in photocatalytic H2 production at a lower Pt loading than observed for a classical Pt nanoparticle Pt/TiO2 arrangement.

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APA:

Cha, G., Mazare, A.V., Hwang, I., Denisov, N., Will, J., Yokosawa, T.,... Schmuki, P. (2022). A facile “dark”-deposition approach for Pt single‐atom trapping on facetted anatase TiO2 nanoflakes and use in photocatalytic H2 generation. Electrochimica Acta, 412, 140129. https://dx.doi.org/10.1016/j.electacta.2022.140129

MLA:

Cha, Gihoon, et al. "A facile “dark”-deposition approach for Pt single‐atom trapping on facetted anatase TiO2 nanoflakes and use in photocatalytic H2 generation." Electrochimica Acta 412 (2022): 140129.

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