期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 37, 期 19, 页码 14152-14160出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.07.100
关键词
Co@Pt core-shell nanostructures; Branched morphologies; Supported electrocatalyst; Oxygen reduction reaction; Fuel cells
资金
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20110171110024]
- National Natural Science Foundation of China [21073241, U1034003]
- General Motors [RD-07-295-NV508]
- State Key Laboratory of Optoelectronic Materials and Technologies [2010-ZY-4-4, 2010-ZY-4-7]
An oxygen-mediated galvanic battery reaction strategy has been developed to one-step synthesize carbon-supported Co@Pt core-shell nanostructures. Relying on this strategy, a structural evolution of 3-D Pt-on-Co bimetallic nanodendrites into Co@Pt core-shell configuration is readily achieved in our study. These well-supported and low-Pt-content nanostructures show superior electrocatalytic activities to oxygen reduction reaction. Especially, the supported Co@Pt core-shell electrocatalyst for oxygen reduction reaction shows a high activity with the maximal Pt-mass activity of 465 mA mg(-1) Pt at 0.9 V (vs. RHE). The present investigation clearly demonstrates that the design and synthesis of the core-shell nanostructures is a viable route for building Pt-based electrocatalysts with optimized utilization efficiency and higher cost performance. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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