期刊
DALTON TRANSACTIONS
卷 44, 期 15, 页码 6748-6754出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4dt03726j
关键词
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资金
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-13ER46972]
- China Scholarship Council
- National Natural Science Foundation [21303058]
- Shanghai Municipal Natural Science Foundation [13ZR1412400, 11JC1403400]
By one-step pyrolysis of a unique cage-in-cage cobalt metal-organic framework, nitrogen-doped carbon cubes embedded with numerous metallic Co nanoparticles were obtained. A considerable amount of Co particles was encapsulated in thin carbon shells and formed the core-shell-like Co@C structure. With about 60 wt% Co particles in the prepared sample, the nanocomposites of Co nanoparticles and nitrogen-doped carbon show electrocatalytic activity for the oxygen reduction reaction (ORR) with an efficiency comparable to the commercial Pt/C catalyst, but with better durability and methanol-tolerance performance. The metallic Co nanoparticles were found to play an important role in enhancing the ORR activity of the nanocomposites. This simple one-step pyrolysis method provides a novel synthetic route for the synthesis of core-shell-like Co@C nano-composites. The synthesized material represents a highly active non-precious metal catalyst for ORR.
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