期刊
JOURNAL OF POWER SOURCES
卷 262, 期 -, 页码 232-238出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2014.03.139
关键词
Multi-laminated particles; Solid carbon paste electrode; Conducting polymer; 2-Amino-5-mercapto-1,3,4-thiadiazole; Electrocatalysis; Direct methanol fuel cell
资金
- National Nature Science Foundation of China [51203040]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130111110025]
A simple electrodeposition approach to grow multi-laminated copper particles on two conductive substrates is presented. Morphological and structural characterization was performed using SEM and XRD. The copper crystallites are preferentially oriented with {111} planes parallel to the substrate surfaces, providing an optimum interface for methanol oxidation. There are a large number of edges, corners, and atomic steps around individual multi-laminated nanostructured particles. The excellent electrocatalytic activity of the particles to methanol oxidation in alkaline solutions is demonstrated by cyclic voltammetry, electrochemical impedance spectroscopy and chronoamperometry. The presence of the conductive poly(2-amino-5-mercapto-1,3,4-thiadiazole) interlayer between the Cu particles and the carbon paste substrate results in larger specific surface areas of the particles and smaller charge-transfer resistances of methanol oxidation reaction in the lower potential range. Such an anisotropic laminated structure of non-noble metal nanomaterials deserves further investigation for finding a suitable alternative to noble metal-based anodic catalysts in fuel cells. (C) 2014 Elsevier B.V. All rights reserved.
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