Self‐Enhancing H2 Evolution from TiO2 Nanostructures under Illumination

Wierzbicka E, Zhou X, Denisov N, Yoo JE, Fehn D, Liu N, Meyer K, Schmuki P (2019)

Publication Type: Journal article

Publication year: 2019

Journal

DOI: 10.1002/cssc.201900192

Abstract

Illumination of anatase in an aqueous methanolic solution leads to the formation of Ti ³⁺ sites that are catalytically active for the generation of dihydrogen (H 2 ). With increasing illumination time, a light-induced self-amplification of the photocatalytic H 2 production rate can be observed. The effect is characterized by electron paramagnetic resonance (EPR) spectroscopy, reflectivity, and photoelectrochemical techniques. Combined measurements of H 2 generation rates and in situ EPR spectroscopic observation over the illumination time with AM 1.5G or UV light establish that the activation is accompanied by the formation of Ti ³⁺ states, which is validated through their characteristic EPR resonance at g=1.93. This self-activation and amplification behavior can be observed for anatase nanoparticles and nanotubes.

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How to cite

APA:

Wierzbicka, E., Zhou, X., Denisov, N., Yoo, J.E., Fehn, D., Liu, N.,... Schmuki, P. (2019). Self‐Enhancing H2 Evolution from TiO2 Nanostructures under Illumination. Chemsuschem. https://dx.doi.org/10.1002/cssc.201900192

MLA:

Wierzbicka, Ewa, et al. "Self‐Enhancing H2 Evolution from TiO2 Nanostructures under Illumination." Chemsuschem (2019).

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