Photoelectrochemical hydrogen generation by Ga2O3 nanowires

Kin Tak Lam, Ya Ling Wu, Shoou-Jinn Chang

Research output: Contribution to journalArticlepeer-review

Abstract

The authors report the growth of β-Ga2O3 nanowires using a vapor phase transport method as a photoelectrochemical photocathode for hydrogen generation by splitting water. Under light illumination, it is observed that variations of the photocurrent with bias voltage depend strongly on the morphology and crystal quality of β-Ga2O3 nanowires in electrolyte. Three-electrode photoelectrochemical (PEC) efficiencies of Ga2O3 nanowires are 0.006%, 0.803%, and 1.684% at zero bias voltage (VCE) for the samples grown at 850, 900 and 950 °C, respectively. An essential requirement of resistance to reactions such as electrochemical corrosion, photocorrosion and dissolution at the solid-liquid interface was demonstrated. The results suggest that the Ga2O3 nanowires can be applied for designing high performance PEC devices.

Original languageEnglish
Pages (from-to)810-814
Number of pages5
JournalScience of Advanced Materials
Volume9
Issue number5
DOIs
Publication statusPublished - 2017 Jan 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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