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 journalArticlepeer-review

3 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 languageEnglish
Pages (from-to)15076-15086
Number of pages11
JournalJournal of Materials Chemistry A
Volume9
Issue number26
DOIs
Publication statusPublished - Jul 14 2021

All Science Journal Classification (ASJC) codes

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

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