Journal
LANGMUIR
Volume 28, Issue 18, Pages 7168-7173Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la300813z
Keywords
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Funding
- National Natural Science Foundation of China [20671003, 20971003]
- Chinese Ministry of Education [209060]
- Program for New Century Excellent Talents in University [NCET 11-0888]
- Science and Technological Fund of Anhui Province for Outstanding Youth [10040606Y32]
- Natural Science of Anhui Education Committee [KJ2012A143]
- Anhui Normal University
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It is a known fact that Pd-based bimetallic nanostructures possess unique properties and excellent catalytic performance. In this work, the Au-Pd alloy and core-shell nanostructures have been prepared by a simple one-pot hydrothermal coreduction route, and their formation process and mechanism are discussed in detail. A reducing capacity-induced controlled reducing mechanism is proposed for the formation process of Au-Pd bimetallic nanostructures. CTAB plays a key role in the formation of alloy Au-Pd nanostructures. When CTAB is absent, the products are typical core-shell nanostructures. Moreover, the as-prepared nanostructures exhibit excellent electrocatalytic ORR performance in alkaline media, especially for Au-Pd alloy nanostructures. The overpotential of oxygen reduction gets reduced significantly, and the peak potential is positive-shifted by 44 and 34 mV in comparison with the core-shell ones and Pd/C catalyst, respectively. Thus, the controllable preparation and excellent electrocatalytic properties will make them become a potentially cheaper Pd-based cathodic electrocatalyst for DAFCs in alkaline media.
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