Hollow N-Doped Carbon Spheres with Isolated Cobalt Single Atomic Sites: Superior Electrocatalysts for Oxygen Reduction

Yunhu Han, Yang Gang Wang, Wenxing Chen, Ruirui Xu, Lirong Zheng, Jian Zhang, Jun Luo, Rong An Shen, Youqi Zhu, Weng Chon Cheong, Chen Chen, Qing Peng, Dingsheng Wang*, Yadong Li

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

586 引用 (Scopus)

摘要

The search for a low-cost, ultrastable, and highly efficient non-precious metal catalyst substitute for Pt in the oxygen reduction reaction (ORR) is extremely urgent, especially in acidic media. Herein, we develop a template-assisted pyrolysis (TAP) method to obtain a unique Co catalyst with isolated single atomic sites anchored on hollow N-doped carbon spheres (ISAS-Co/HNCS). Both the single sites and the hollow substrate endow the catalyst with excellent ORR performance. The half-wave potential in acidic media approaches that of Pt/C. Experiments and density functional theory have verified that isolated Co sites are the source for the high ORR activity because they significantly increase the hydrogenation of OH∗ species. This TAP method is also demonstrated to be effective in preparing a series of ISAS-M/HNCS, which provides opportunities for discovering new catalysts.

源语言英语
页(从-至)17269-17272
页数4
期刊Journal of the American Chemical Society
139
48
DOI
出版状态已出版 - 6 12月 2017
已对外发布

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