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

Parisa Edalati; Xiao Feng Shen; Motonori Watanabe; Tatsumi Ishihara; Makoto Arita; Masayoshi Fuji; Kaveh Edalati

doi:10.1039/d1ta03861c

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

Parisa Edalati, Xiao Feng Shen, Motonori Watanabe, Tatsumi Ishihara, Makoto Arita, Masayoshi Fuji, Kaveh Edalati

Research output: Contribution to journal › Article › peer-review

50 Citations (Scopus)

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 TiZrHfNbTaO₆N₃and a d⁰electronic 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.

Original language	English
Pages (from-to)	15076-15086
Number of pages	11
Journal	Journal of Materials Chemistry A
Volume	9
Issue number	26
DOIs	https://doi.org/10.1039/d1ta03861c
Publication status	Published - Jul 14 2021

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Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

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10.1039/d1ta03861c

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title = "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 TiZrHfNbTaO6N3and a d0electronic 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.",

author = "Parisa Edalati and Shen, {Xiao Feng} and Motonori Watanabe and Tatsumi Ishihara and Makoto Arita and Masayoshi Fuji and Kaveh Edalati",

note = "Funding Information: The authors acknowledge Dr Abbas Mohammadi of Kyushu University for his assistance in microstructural analysis. This work is supported in part by the WPI-I2CNER, Japan, and in part by a Grant-in-Aid for Scientific Research on Innovative Areas from the MEXT, Japan (No. 21H00150). Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2021.",

year = "2021",

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doi = "10.1039/d1ta03861c",

language = "English",

volume = "9",

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TY - JOUR

T1 - High-entropy oxynitride as a low-bandgap and stable photocatalyst for hydrogen production

AU - Edalati, Parisa

AU - Shen, Xiao Feng

AU - Watanabe, Motonori

AU - Ishihara, Tatsumi

AU - Arita, Makoto

AU - Fuji, Masayoshi

AU - Edalati, Kaveh

N1 - Funding Information: The authors acknowledge Dr Abbas Mohammadi of Kyushu University for his assistance in microstructural analysis. This work is supported in part by the WPI-I2CNER, Japan, and in part by a Grant-in-Aid for Scientific Research on Innovative Areas from the MEXT, Japan (No. 21H00150). Publisher Copyright: © The Royal Society of Chemistry 2021.

PY - 2021/7/14

Y1 - 2021/7/14

N2 - 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 TiZrHfNbTaO6N3and a d0electronic 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.

AB - 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 TiZrHfNbTaO6N3and a d0electronic 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.

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DO - 10.1039/d1ta03861c

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JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

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

Abstract

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