期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 690, 期 -, 页码 1-7出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.08.108
关键词
Electrochemical sensor; Ag-Au alloy; H2O2 reduction; Cu2O; Mechanism
资金
- National Natural Science Foundation of China [21421001, 21276116, 21477050, 21301076, 21303074]
- Natural Science Foundation of Jiangsu Province [BK20140530, BK20150482]
- China Postdoctoral Science Foundation [2015M570409]
- Chinese-German Cooperation Research Project [GZ1091]
- Program for New Century Excellent Talents in University [NCET-13-0835]
- Six Talents Peak Project in Jiangsu Province [XCL-025]
- Program for High-Level Innovative and Entrepreneurial Talents in Jiangsu Province
- Henry Fok Education Foundation [141068]
To develop the high efficiency nonenzymatic hydrogen peroxide (H2O2) sensor, Cu2O nanocubes decorated by Ag-Au alloy nanoparticles (Ag-Au/Cu2O nanocomposites) were designed and synthesized in this paper. By studying for the electrocatalytic activities toward H2O2 reduction, the as-prepared Ag-Au/Cu2O nanocomposites exhibited higher performance toward electrochemical oxidation of H2O2 in 0.2 M phosphate buffered saline (PBS) solution than pristine Cu2O nanocubes, Ag-Cu2O and Au-Cu2O nano composites, and the detection limit was 130 M and the sensitivity was 4.16 A cm(-2) mM(-1), respectively. The enhanced electrochemical activity of Ag-Au/Cu2O nanocomposites indicated that the Ag-Au alloys dispersed on the surface of Cu2O played a key role in the sensing properties enhancement, and the possible mechanisms for the enhanced electrochemical activity of Ag-Au/Cu2O nanocomposites have been detailed discussed. In addition, the anti-interference capability experiment indicated that the Ag-Au/Cu2O nanocomposites have good selectivity toward H2O2. The excellent performance demonstrated the potential application of the Ag-Au/Cu2O nanocomposites for H2O2 detection. (C) 2016 Elsevier B.V. All rights reserved.
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