Issue 26, 2021

High-entropy oxynitride as a low-bandgap and stable photocatalyst for hydrogen production

Abstract

Metal oxynitrides are promising photocatalysts due to their narrow bandgap, but their lower stability compared to metal oxides is a drawback. The introduction of high-entropy alloys with entropy-stabilization features has shown high potential for various functional applications in recent years. By considering these two types of materials, we developed a high-entropy oxynitride for photocatalytic water splitting. The material, with a general composition of TiZrHfNbTaO6N3 and a d0 electronic configuration, showed a narrow bandgap of 1.6 eV, which is much lower than the bandgaps of relevant binary and high-entropy oxides. The material exhibited photocurrent generation and photocatalytic hydrogen production with high chemical stability, suggesting the high potential of high-entropy oxynitrides as advanced low-bandgap and stable photocatalysts.

Graphical abstract: High-entropy oxynitride as a low-bandgap and stable photocatalyst for hydrogen production

Article information

Article type
Paper
Submitted
07 maj 2021
Accepted
10 jun 2021
First published
11 jun 2021

J. Mater. Chem. A, 2021,9, 15076-15086

High-entropy oxynitride as a low-bandgap and stable photocatalyst for hydrogen production

P. Edalati, X. Shen, M. Watanabe, T. Ishihara, M. Arita, M. Fuji and K. Edalati, J. Mater. Chem. A, 2021, 9, 15076 DOI: 10.1039/D1TA03861C

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