2024-03-29T13:17:05Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00021780
2022-12-14T04:19:36Z
1836:2014
An Al-doped SrTiO3 photocatalyst maintaining sunlight-driven overall water splitting activity for over 1000 h of constant illumination
Lyu, Hao
Hisatomi, Takashi
Goto, Yosuke
Yoshida, Masaaki
Higashi, Tomohiro
Katayama, Masao
Takata, Tsuyoshi
Minegishi, Tsutomu
Nishiyama, Hiroshi
Yamada, Taro
Sakata, Yoshihisa
Asakura, Kiyotaka
Domen, Kazunari
Photocatalytic water splitting is a viable approach to the large-scale production of renewable solar hydrogen. The apparent quantum yield for this reaction has been improved, but the lifespan of photocatalysts functioning under sunlight at ambient pressure have rarely been examined, despite the critical importance of this factor in practical applications. Herein, we show that Al-doped SrTiO3 (SrTiO3: Al) loaded with a RhCrOx (rhodium chromium oxide) cocatalyst splits water with an apparent quantum yield greater than 50% at 365 nm. Moreover, following the photodeposition of CoOOH and TiO2, this material maintains 80% of its initial activity and a solar-to-hydrogen energy conversion efficiency greater than or equal to 0.3% over a span of 1300 h under constant illumination by simulated sunlight at ambient pressure. This result is attributed to reduced dissolution of Cr in the cocatalyst following the oxidative photodeposition of CoOOH. The photodeposition of TiO2 further improves the durability of this photocatalyst. This work demonstrates a concept that could allow the design of longterm, large-scale photocatalyst systems for practical sunlight-driven water splitting.
Article
CHEMICAL SCIENCE.10(11):3196-3201(2019)
journal article
ROYAL SOC CHEMISTRY
2019-01-24
application/pdf
CHEMICAL SCIENCE
11
10
3196
3201
2041-6520
AA12555653
https://soar-ir.repo.nii.ac.jp/record/21780/files/15H05494_01.pdf
eng
30996901
https://www.ncbi.nlm.nih.gov/pubmed/30996901
10.1039/c8sc05757e
https://doi.org/10.1039/c8sc05757e
This journal is ©The Royal Society of Chemistry 2019. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.