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Photocatalytic hydrogen evolution from water was observed over nanocrystalline gallium oxynitride spinel under simulated solar light irradiation (320 nm < λ < 800 nm). Up to 8 μmol h ⁻¹ of H ₂ was evolved without co-catalyst loading.
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Dharmagunawardhane et al. (2014) studied this question.
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