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

doi:10.1002/cptc.201900061

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^*

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

10 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 language	English
Pages (from-to)	521-524
Number of pages	4
Journal	ChemPhotoChem
Volume	3
Issue number	7
DOIs	https://doi.org/10.1002/cptc.201900061
Publication status	Published - 2019 Jul 1

Keywords

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

ASJC Scopus subject areas

Analytical Chemistry
Physical and Theoretical Chemistry
Organic Chemistry

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10.1002/cptc.201900061

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

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.",

keywords = "carbon nanotubes, electrode materials, photocatalysis, semitransparent photoanode, solar hydrogen production, tandem photoelectrochemical cell",

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

note = "Funding Information: This work was funded by Grants‐in‐Aids for Scientific Research (A) (Nos. 16H02417 and 17H01216) and Young Scientists (A) (No. 15H05494) from the Japan Society for the Promotion of Science (JSPS). This work was also financially supported in part by the Precursory Research for Embryonic Science and Technology (PRESTO) project (No. JPMJPR1543) of the Japan Science and Technology Agency (JST). Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

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AU - Akagi, Daijiro

AU - Kageshima, Yosuke

AU - Hashizume, Yuta

AU - Aoi, Shigeki

AU - Sasaki, Yutaka

AU - Kaneko, Hiroyuki

AU - Higashi, Tomohiro

AU - Hisatomi, Takashi

AU - Katayama, Masao

AU - Minegishi, Tsutomu

AU - Noda, Suguru

AU - Domen, Kazunari

N1 - Funding Information: This work was funded by Grants‐in‐Aids for Scientific Research (A) (Nos. 16H02417 and 17H01216) and Young Scientists (A) (No. 15H05494) from the Japan Society for the Promotion of Science (JSPS). This work was also financially supported in part by the Precursory Research for Embryonic Science and Technology (PRESTO) project (No. JPMJPR1543) of the Japan Science and Technology Agency (JST). Publisher Copyright: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2019/7/1

Y1 - 2019/7/1

N2 - 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.

AB - 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.

KW - carbon nanotubes

KW - electrode materials

KW - photocatalysis

KW - semitransparent photoanode

KW - solar hydrogen production

KW - tandem photoelectrochemical cell

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

Abstract

Keywords

ASJC Scopus subject areas

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