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Cited by 282

The DOI matches its Crossref record; 57 of the 57 references it cites were found in a registry or an index.

Role and Function of Noble-Metal/Cr-Layer Core/Shell Structure Cocatalysts for Photocatalytic Overall Water Splitting Studied by Model Electrodes

Yoshida, Masaaki, Takanabe, Kazuhiro, Maeda, Kazuhiko, Ishikawa, Akio, Kubota, Jun, Sakata, Yoshihisa, Ikezawa, Yasunari, Domen, Kazunari·2009·The Journal of Physical Chemistry C

Abstract

The mechanism of hydrogen evolution by a core/shell noble-metal/Cr 2 O 3 particulate as a highly efficient cocatalyst for overall water splitting under visible light using the photocatalyst (Ga 1− x Zn x )(N 1− x O x ) is investigated by electrochemical and in situ spectroscopic measurements of model electrodes. The electrodes are prepared by electrochemical deposition of 1.8−3.5 nm thick Cr 2 O 3 films on Rh and Pt plates and are evaluated as model systems of Rh/Cr 2 O 3 and Pt/Cr 2 O 3 core/shell particulates, which have previously been applied effectively as cocatalysts for hydrogen evolution in this system. Proton adsorption/desorption and H 2 evolution currents are observed for both the Cr 2 O 3 -coated and the bare electrodes, and the infrared absorption band due to Pt−H stretching (2039 cm −1 ) is apparent for both the coated and the bare electrodes. These observations indicate that the Cr 2 O 3 layer does not interfere with proton reduction or hydrogen evolution and that proton reduction takes place at the Cr 2 O 3 /Pt interface. However, the reduction of oxygen to water is suppressed only in the Cr 2 O 3 -coated samples. The Cr 2 O 3 layer is thus permeable to protons and the evolved hydrogen molecules, but not to oxygen. Cocatalyst modification by thin films with this type of functionality thus appears to be a useful strategy for improving the efficiency of photocatalytic overall water splitting.

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Metadata

Authors
Yoshida, M., Takanabe, K., Maeda, K., Ishikawa, A., Kubota, J., Sakata, Y., Ikezawa, Y., & Domen, K.
Venue
The Journal of Physical Chemistry C
Published
2009-05-13
Volume
113
Issue
23
Pages
10151-10157
ISSN
  • 1932-7447 (ISSN-L)
  • 1932-7455
OpenAlex
W2012881910
Cited by
282
References
57
FWCI
5.30
Type
journal article
Language
en
Open access
closed

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