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论文类型：期刊论文
发表时间：2016-01-01
发表刊物：ENERGY & ENVIRONMENTAL SCIENCE
收录刊物：SCIE、EI、ESI高被引论文、Scopus、ESI热点论文
卷号：9
期号：1
页面范围：107-111
ISSN号：1754-5692
摘要：Hollow nanostructures with a complex interior and superb structural tenability offer great advantages for constructing advanced catalysts. Herein, we report the designed synthesis of novel Co nanoparticle-embedded carbon@Co9S8 double-shelled nanocages (Co-C@Co9S8 DSNCs) by a metal-organic-framework-engaged strategy. Uniform zeolitic imidazolate framework (ZIF-67)@amorphous CoS yolk-shelled structures are first fabricated and then converted to Co-C@Co9S8 DSNCs by thermal annealing in N-2 flow. The Co-C nanocages inside Co9S8 shells function as the active centers for the oxygen reduction reaction (ORR). The Co9S8 shells prevent the Co-C active centers from aggregation while acting as nanoreactors. As a result, the Co-C@Co9S8 DSNCs exhibit excellent performance for the ORR in terms of low over-potential, high current density, excellent stability and methanol tolerance capability.