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- Title
Interface Engineering of a CoO<sub> x</sub>/Ta<sub>3</sub>N<sub>5</sub> Photocatalyst for Unprecedented Water Oxidation Performance under Visible-Light-Irradiation.
- Authors
Chen, Shanshan; Shen, Shuai; Liu, Guiji; Qi, Yu; Zhang, Fuxiang; Li, Can
- Abstract
Cocatalysts have been extensively used to promote water oxidation efficiency in solar-to-chemical energy conversion, but the influence of interface compatibility between semiconductor and cocatalyst has been rarely addressed. Here we demonstrate a feasible strategy of interface wettability modification to enhance water oxidation efficiency of the state-of-the-art CoOx/Ta3N5 system. When the hydrophobic feature of a Ta3N5 semiconductor was modulated to a hydrophilic one by in situ or ex situ surface coating with a magnesia nanolayer (2-5 nm), the interfacial contact between the hydrophilic CoOx cocatalyst and the modified hydrophilic Ta3N5 semiconductor was greatly improved. Consequently, the visible-light-driven photocatalytic oxygen evolution rate of the resulting CoOx/MgO(in)-Ta3N5 photocatalyst is ca. 23 times that of the pristine Ta3N5 sample, with a new record (11.3 %) of apparent quantum efficiency (AQE) under 500-600 nm illumination.
- Subjects
COBALT oxides; TANTALUM compounds; PHOTOCATALYSTS; SEMICONDUCTORS; SURFACE coatings; PHOTOCATALYSIS
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 10, p3090
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201409906