Supersonic aerosol-deposited TiO2 photoelectrodes for photoelectrochemical solar water splitting

Jung Jae Park, Do Yeon Kim, Jong Gun Lee, You Hong Cha, Mark T. Swihart, Sam S. Yoon

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Photoelectrochemical (PEC) water-splitting is a promising approach for economical and environmentally friendly hydrogen production. We report here the preparation of nanocrystalline TiO2 films by aerosol deposition (AD) and their performance as photoelectrodes for PEC water splitting. The AD deposited films, 0.5 to 4 μm in thickness, were analyzed to establish the dependence of water splitting performance on film thickness, morphology, and crystallinity. Film thickness and annealing were found to strongly influence the photoelectrochemical water splitting performance. As-deposited TiO2 films exhibited much higher photoelectrochemical activity than annealed TiO 2 films. The as-deposited, 3 μm thick TiO2 films exhibited the highest photocurrent density, 93 μA cm-2 at -0.2 V vs. Ag/AgCl, under UV illumination (100 mW cm-2). The same films annealed at 500 °C showed a much lower photocurrent density of 2.9 μA cm-2 at 0.2 V vs. Ag/AgCl.

Original languageEnglish
Pages (from-to)8661-8670
Number of pages10
JournalRSC Advances
Volume4
Issue number17
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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