Improved corrosion resistance of GaN electrodes in NaCl electrolyte for photoelectrochemical hydrogen generation

Ding Hsiun Tu, Hsin Chieh Wang, Po Sheng Wang, Wei Chao Cheng, Kuei Hsien Chen*, Chih I. Wu, Surojit Chattopadhyay, Li Chyong Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

A significant improvement in the stability of high-quality GaN films, for photoelectrochemical hydrogen generation, has been demonstrated using near neutral NaCl(aq) electrolyte instead of conventional acidic HCl (aq). The experimental results conclude that the as-grown surface oxide passivates the surface from corrosion and, therefore, leads to a higher photocurrent. Our result paves the way for the future development of stable hydrogen generation with abundant sea water and high-efficiency III-V compound semiconductors.

Original languageEnglish
Pages (from-to)14433-14439
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number34
DOIs
StatePublished - 13 Nov 2013

Keywords

  • GaN
  • Hydrogen generation
  • Sea water
  • Stability
  • Water splitting

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