A Semitransparent Nitride Photoanode Responsive up to λ=600 nm Based on a Carbon Nanotube Thin Film Electrode

Daijiro Akagi, Yosuke Kageshima, Yuta Hashizume, Shigeki Aoi, Yutaka Sasaki, Hiroyuki Kaneko, Tomohiro Higashi, Takashi Hisatomi, Masao Katayama, Tsutomu Minegishi, Suguru Noda, Kazunari Domen

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The development of semitransparent photoanodes is required for the construction of tandem photoelectrochemical (PEC) water splitting cells incorporating photocathodes. However, the poor stability of transparent conductive oxides at high temperatures hampers the growth of non-oxide photoanodes with intense visible light absorption. In this work, semitransparent Ta3N5 thin film photoanodes were prepared on quartz glass substrates coated with carbon nanotubes (CNTs) by sputtering and thermal nitridation. This process makes use of the high thermal and chemical stability as well as the tunable conductivity and transmittance of CNT substrates. The photoanodic current produced by these Ta3N5 photoanodes at negative potentials is also enhanced by surface modification with Mg species. Conductive semitransparent CNT substrates such as these will assist in the development of new tandem PEC cells for water splitting.

Original languageEnglish
Pages (from-to)521-524
Number of pages4
JournalChemPhotoChem
Volume3
Issue number7
DOIs
Publication statusPublished - 2019 Jul 1

Keywords

  • carbon nanotubes
  • electrode materials
  • photocatalysis
  • semitransparent photoanode
  • solar hydrogen production
  • tandem photoelectrochemical cell

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Analytical Chemistry

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