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Issue 25, 2020
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Efficient photocatalytic hydrogen evolution on single-crystalline metal selenide particles with suitable cocatalysts

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Abstract

It is important to improve the apparent quantum yields (AQYs) of narrow bandgap photocatalysts to achieve efficient H2 production. The present work demonstrates a particulate solid solution of zinc selenide and copper gallium selenide (denoted as ZnSe:CGSe) that evolves H2 efficiently and is responsive to visible light up to 725 nm. This material was synthesized using a flux-assisted method and was found to comprise single-crystalline tetrahedral particles. The coloading of Ni and Rh, Pt, Pd or Ru as cocatalysts further improved the photocatalytic H2 evolution rate over this photocatalyst. With the optimal coloading of a Ni–Ru composite cocatalyst, an AQY of 13.7% was obtained at 420 nm during a sacrificial H2 evolution reaction, representing the highest value yet reported for a photocatalyst with an absorption edge longer than 700 nm. The present study demonstrates that the preparation of single-crystalline particles and the rational assembly of composite cocatalysts are effective strategies that allow the efficient utilization of long wavelengths by metal selenide photocatalysts for solar fuel production.

Graphical abstract: Efficient photocatalytic hydrogen evolution on single-crystalline metal selenide particles with suitable cocatalysts

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Supplementary files

Article information


Submitted
27 Feb 2020
Accepted
01 Apr 2020
First published
01 Apr 2020

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020,11, 6436-6441
Article type
Edge Article

Efficient photocatalytic hydrogen evolution on single-crystalline metal selenide particles with suitable cocatalysts

S. Chen, J. J. M. Vequizo, T. Hisatomi, M. Nakabayashi, L. Lin, Z. Wang, A. Yamakata, N. Shibata, T. Takata, T. Yamada and K. Domen, Chem. Sci., 2020, 11, 6436
DOI: 10.1039/D0SC01167C

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