Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 164, Issue 2, Pages F65-F70Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0511702jes
Keywords
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Funding
- Ministry of Trade, Industry and Energy (MOTIE, Korea) under the Industrial Technology Innovation Program [10062511]
- Priority Research Centers Program through the National Research Foundation of Korea [2009-0093823]
- Yonsei University Research Fund(Post Doc. Researcher Supporting Program) [2016-12-0005]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10062511] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Acarbon-supported Pt2Ni1 catalyst with a Pt rich shell was prepared using a high temperature treatment. In this process, polydopamine (PDA) encapsulates whole Pt/C and acts as a protective coating layer to suppress sintering effects of particles during the high temperature treatment. Dopamine, a mussel-inspired substrate, is an effective surface coating material because the polymerization of dopamine takes place easily at room temperature and exhibits a strong adhesive function with almost any surface. With increasing thickness of the PDA coating layer, the particle size became smaller following heat-treatment. However, when excess PDA was used, residue remained on the surface of catalyst. As a result, the active surface area of catalyst was reduced, thereby resulting in lowered catalytic performance. The Pt2Ni1/C catalyst prepared with an optimized amount of PDA layer exhibited improved mass activity of 0.43 A mg(Pt)(-1) at 0.9 V, which is almost two times higher than that of Pt/C. (C) 2016 The Electrochemical Society. All rights reserved.
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