Photocatalytic activity of gallium nitride for producing hydrogen from water under light irradiation
作者： T. Kida , Y. Minami , G. Guan , M. Nagano , M. Akiyama
DOI: 10.1007/S10853-005-5655-8
关键词: Oxide 、 Hydrogen 、 Irradiation 、 Inorganic chemistry 、 Gallium nitride 、 X-ray photoelectron spectroscopy 、 Noble metal 、 Overpotential 、 Materials science 、 Photocatalysis
摘要: Photocatalytic activity of powdered GaN for decomposing water into hydrogen under light irradiation was investigated. It found that has producing from containing electron donors (Na2S-Na2SO3, CH3OH) without a loading noble metal; the obtained H2 yield ca. 150 μmol 200 h-Xe lamp (300 W) irradiation. The increased by adding NaOH in reaction solution due to photo-etching and concomitant removal native oxide surface, as confirmed XPS, XRD, PL measurements. band energy scheme suggests conduction edge is positioned at 0.5 V higher than redox potential H+/H2. This large difference (overpotential) makes photocatalytic evolution over possible.
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