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Hydrogen Generation for 500 hours by Photoelectrolysis of Water using GaN

  • W. Ohara (a1), D. Uchida (a1), T. Hayashi (a1), M. Deura (a1) and K. Ohkawa (a1)...

Abstract

We confirmed that GaN photocatalyst with NiO cocatalyst (GaN-NiO) continuously produced hydrogen from water for 500 hours without any extra bias. The GaN-NiO photocatalyst was hardly etched and 184-mL hydrogen gas was produced from the electric charge of 1612 coulombs, the Faradic efficiency of which was 89.2%. The conversion efficiency from incident light energy to hydrogen chemical energy was 0.98% in average for 500 h. The incident photon-to-current conversion efficiency (IPCE) was 50% at 300 nm and 35% at 350 nm after the experiment, which was much higher than those of other semiconductor-based photocatalysts.

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Keywords

Hydrogen Generation for 500 hours by Photoelectrolysis of Water using GaN

  • W. Ohara (a1), D. Uchida (a1), T. Hayashi (a1), M. Deura (a1) and K. Ohkawa (a1)...

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