期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 41, 期 33, 页码 14704-14712出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.04.157
关键词
Cd0.5Zn0.5S; Photocatalyst; AuPd bimetallic alloy; Water splitting; Visible light
资金
- National Science Foundation of China [21003157 21273285, 51572295]
- Beijing Nova Program [2008B76]
- Science Foundation of China University of Petroleum, Beijing [KYJJ2012-06-20]
In this study, novel AuPd bimetallic co-catalyst decorated Cd0.5Zn0.5S photocatalyst was successfully synthesized via an in-situ chemical deposition method. The physical as well as the photophysical properties of the as-obtained AuPd/Cd0.5Zn0.5S samples were characterized by X-ray diffractometry (XRD), Transmission electron microscope (TEM), UV-vis diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and surface photovoltage spectroscopy (SPV). The AuPd bimetallic co-catalysts showed dramatic photo-generated charge separation efficiency in Cd0.5Zn0.5S sample, and thus significantly enhance the H-2 production activity under visible light irradiation. The AuPd/Cd0.5Zn0.5S sample with 0.5 wt% content had the highest catalytic activity, and the corresponding H-2 evolution rate is 3.65 mmol g(-1) h(-1), which was about 12 times as that of pure Cd0.5Zn0.5S sample under visible light irradiation. The photocatalytic activity of the photocatalyst was stable even after 9 cycling photocatalytic experiments. A possible mechanism on the photocatalytic enhancement of AuPd NPs was systematically investigated, which can provide a novel concept for the synthesis of other desirable photo catalytic materials. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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