Optimization of conditions for hydrogen production from anodized TiO 2 nanotube-based photoelectrochemical cells

Won Sung Hong, Jong Hyeok Park, Gui Young Han

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The photocatalytic splitting of water into H 2 and O 2 using semiconductors has received much attention, especially in terms of its potential application to the direct production of H 2 as a clean energy source. In this study, the H 2 yield increased with increasing reactor temperature, but the TiO 2 nanotube arrays collapsed after prolonged operation at temperatures over 75 °C. We found that aqueous Na 2SO 3 reagent was the best hole scavenger of the different aqueous solutions examined. Using the optimum temperatures and electrolytes, we conducted an experiment to produce H 2 from solutions with different pH values, and found that acidic conditions were better in terms of the amount of H 2 produced. The results obtained allowed us to identify the optimal temperature, electrolyte and pH conditions required to produce H 2 by photochemically splitting water.

Original languageEnglish
Pages (from-to)7293-7297
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume9
Issue number12
DOIs
Publication statusPublished - 2009 Dec 1

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All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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