Issue 14, 2015
From the journal:

Chemical Communications

Photocatalytic hydrogen evolution over β-iron silicide under infrared-light irradiation†

Masaharu Yoshimizu,a   Ryoya Kobayashi,a   Makoto Saegusa,a   Toshihiro Takashima,b   Hiroshi Funakubo,c   Kensuke Akiyama,d   Yoshihisa Matsumotod  and  Hiroshi Irie*be  

* Corresponding authors

a Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan

b Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan
E-mail: hirie@yamanashi.ac.jp

c Department of Innovative and Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuda, Midori-ku, Yokohama, Kanagawa 266-8502, Japan

d Kanagawa Industrial Technology Center, 705-1 Shimoizumi, Ebina, Kanagawa 243-0435, Japan

e Japan Science and Technology Agency (JST), Core Research for Evolutionary Science and Technology (CREST), 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan

Abstract

We investigated the ability of β-iron silicide (β-FeSi2) to serve as a hydrogen (H2)-evolution photocatalyst due to the potential of its conduction band bottom, which may allow thermodynamically favorable H2 evolution in spite of its small band-gap of 0.80 eV. β-FeSi2 had an apparent quantum efficiency for H2 evolution of ∼24% up to 950 nm (near infrared light), in the presence of the dithionic acid ion (S2O62−) as a sacrificial agent. It was also sensitive to infrared light (>1300 nm) for H2 evolution.

Graphical abstract: Photocatalytic hydrogen evolution over β-iron silicide under infrared-light irradiation

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Article information

DOI
https://doi.org/10.1039/C4CC08093A
Article type
Communication
Submitted
13 Oct 2014
Accepted
06 Jan 2015
First published
06 Jan 2015

Chem. Commun., 2015,51, 2818-2820

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Photocatalytic hydrogen evolution over β-iron silicide under infrared-light irradiation

M. Yoshimizu, R. Kobayashi, M. Saegusa, T. Takashima, H. Funakubo, K. Akiyama, Y. Matsumoto and H. Irie, Chem. Commun., 2015, 51, 2818 DOI: 10.1039/C4CC08093A

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