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CoPt x ‐loaded Zn 0.5 Cd 0.5 S nanocomposites for enhanced visible light photocatalytic H 2 production
Author(s) -
Wang Hanbin,
Li Yang,
Shu Dan,
Chen Xu,
Liu Xiang,
Wang Xina,
Zhang Jun,
Wang Hao
Publication year - 2016
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.3522
Subject(s) - nanocomposite , photocurrent , photocatalysis , bimetallic strip , materials science , electrochemistry , nanotechnology , analytical chemistry (journal) , catalysis , electrode , chemistry , optoelectronics , metallurgy , metal , biochemistry , chromatography
Summary Zn 0.5 Cd 0.5 S solid solution, modified with bimetallic CoPt x nanoparticles, has been prepared using a two‐step organic solution method. The photocatalytic H 2 production rate of CoPt x –Zn 0.5 Cd 0.5 S nanocomposites with different composition and percentage of CoPt x was investigated. The results showed that the 1 wt% CoPt 3 –Zn 0.5 Cd 0.5 S sample had the best activity which was 4.7 times higher than that of pure Zn 0.5 Cd 0.5 S and 1.2 times higher than that of Pt–Zn 0.5 Cd 0.5 S for photocatalytic H 2 production. The transient photocurrent response of the Zn 0.5 Cd 0.5 S showed an obvious increase in the current density after CoPt x loading. Electrochemical impedance spectra measurements showed that the CoPt x –Zn 0.5 Cd 0.5 S nanocomposites with x = 2 and 3 had lower charge transfer resistance R t than that of Pt–Zn 0.5 Cd 0.5 S. The enhanced catalytic properties of the CoPt x –Zn 0.5 Cd 0.5 S nanocomposites are attributed to their better accumulation ability for photoexcited electrons and higher rate for charge separation and transportation. Copyright © 2016 John Wiley & Sons, Ltd.
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