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

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 c...

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Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2021-07, Vol.9 (26), p.1576-1586
Main Authors: Edalati, Parisa, Shen, Xiao-Feng, Watanabe, Motonori, Ishihara, Tatsumi, Arita, Makoto, Fuji, Masayoshi, Edalati, Kaveh
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cited_by cdi_FETCH-LOGICAL-c347t-61acdf621450742b9b8d44714d565bf1402d651fa8d20c8779a5d655f0f110163
cites cdi_FETCH-LOGICAL-c347t-61acdf621450742b9b8d44714d565bf1402d651fa8d20c8779a5d655f0f110163
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container_issue 26
container_start_page 1576
container_title Journal of materials chemistry. A, Materials for energy and sustainability
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creator Edalati, Parisa
Shen, Xiao-Feng
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Fuji, Masayoshi
Edalati, Kaveh
description 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 TiZrHfNbTaO 6 N 3 and a d 0 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. High-entropy oxynitride photocatalysts have the advantages of high-etropy alloys (high stability) and of oxynitrides (narrow bandgap).
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source Royal Society of Chemistry:Jisc Collections:Royal Society of Chemistry Read and Publish 2022-2024 (reading list)
subjects Energy gap
High entropy alloys
Hydrogen production
Metal oxides
Oxides
Oxynitrides
Photocatalysis
Photocatalysts
Photoelectric effect
Photoelectric emission
Stability
Water splitting
title High-entropy oxynitride as a low-bandgap and stable photocatalyst for hydrogen production
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