期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 18, 页码 8820-8825出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm16827h
关键词
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资金
- New & Renewable Energy RD program [2009T100100606]
- Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20114030200060]
- Korea government Ministry of Knowledge Economy
- Korea Evaluation Institute of Industrial Technology (KEIT) [20114030200060] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6B1912] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
To design Pt-based materials with a hollow structure via a galvanic reaction would be one of the effective ways to prepare electro-catalysts with high activity. The galvanic reaction between Pt ions and metal template is usually conducted under limited conditions, which makes the preparation of Pt hollow nanoparticles laborious. Here, we introduce a one-step and one-pot synthetic approach for the preparation of carbon-supported PtNi alloy hollow nanoparticles with a narrow size distribution. Prepared PtNi alloys were characterized by a nonporous shell consisting of a Pt-enriched surface layer and an inner alloy layer of Pt and Ni. Due to its unique structural advantages, this material showed excellent electrocatalytic performance for oxygen reduction (3.3- and 7.8-fold enhanced mass and specific activities compared to those of a commercial carbon-supported Pt nanoparticle). A possible mechanism for the formation of PtNi hollow structure is suggested.
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