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

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

doi:10.1021/jacs.7b10194

articleJournal of the American Chemical SocietyNov 7, 2017Closed access

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

YHYunhu Han YWYang‐Gang Wang WCWenxing Chen RXRuirui Xu LZLirong Zheng

Tsinghua University · Shaanxi Normal University · +3 more institutions

PubMed

Indexed incrossrefpubmed

Abstract

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…

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Topics & keywords

Topics

Keywords

Catalysis
Chemistry
Pyrolysis
Cobalt
Oxygen reduction reaction
Carbon fibers
Substrate (aquarium)
SPHERES

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