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2002•ElectrochemistryOpen access

(Oxy)nitrides as New Photocatalysts for Water Splitting under Visible Light Irradiation

Go Hitoki, Tsuyoshi Takata, Junko N. Kondo, Masahiko Hara, Hisayoshi Kobayashi, Kazunari Domen

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Abstract

A range of transition-metal oxynitrides and a nitride were examined as potential photocatalysts active under visible light. (Oxy)nitrides based on tantalum, niobium and titanium are found to absorb visible light (λ ≤ 600 nm), and some of them are found to evolve H2 or O2 from aqueous solutions containing a sacrificial electron donor (CH3OH) or acceptor (Ag+), respectively, via band gap excitation without noticeable photo-degradation of the catalyst itself.

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A range of transition-metal oxynitrides and a nitride were examined as potential photocatalysts active under visible light. (Oxy)nitrides based on tantalum, niobium and titanium are found to absorb visible light (λ ≤ 600 nm), and some of them are found to evolve H2 or O2 from aqueous solutions containing a sacrificial electron donor (CH3OH) or acceptor (Ag+), respectively, via band gap excitation without noticeable photo-degradation of the catalyst itself.

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Available abstract

A range of transition-metal oxynitrides and a nitride were examined as potential photocatalysts active under visible light. (Oxy)nitrides based on tantalum, niobium and titanium are found to absorb visible light (λ ≤ 600 nm), and some of them are found to evolve H2 or O2 from aqueous solutions containing a sacrificial electron donor (CH3OH) or acceptor (Ag+), respectively, via band gap excitation without noticeable photo-degradation of the catalyst itself.

Key concepts: Visible spectrum, Tantalum nitride, Nitride, Materials science, Photochemistry, Tantalum, Water splitting, Photocatalysis

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