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Constructing Precise Coordination of Nickel Active Sites on Hierarchical Porous Carbon Framework for Superior Oxygen Reduction
Author(s) -
Zhang Shuai,
Xue Hui,
Li Wanlu,
Sun Jing,
Guo Niankun,
Song Tianshan,
Dong Hongliang,
Zhang Jiangwei,
Ge Xin,
Zhang Wei,
Wang Qin
Publication year - 2021
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202102125
Subject(s) - catalysis , nickel , oxygen reduction reaction , materials science , carbon fibers , cathode , oxygen , oxygen reduction , active site , chemical engineering , zinc , inorganic chemistry , chemistry , electrode , electrochemistry , metallurgy , organic chemistry , composite material , composite number , engineering
Single‐atom catalysts (SACs) with specific coordination environment are expected to be efficient electrocatalysts for oxygen reduction reaction (ORR). Herein, NiN 4 C 10 coordination site is constructed through encapsulating Ni 2+ into the cavity of ZIF‐8 as a self‐sacrificing precursor and anchoring it on 3D N‐doped carbon frameworks. The NiN 4 C 10 catalyst shows excellent ORR activity and stability, with a high half‐wave potential (0.938 V vs RHE), which is currently the best performances in Ni‐based SACs. The remarkable performance with high ORR activity in alkaline solution is attributed to the single‐atom nickel active sites with faster electron transport and suitable electronic structure. Moreover, the power density of zinc‐air battery assembled by NiN 4 C 10 as cathode is 47.1% higher than that of the commercial Pt/C. This work not only provides a facile method to prepare extremely active Ni‐based SACs, but also studies the intrinsic mechanism toward the oxygen reduction reaction under alkaline condition.