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Co@C Nanoparticle Embedded Hierarchically Porous N‐Doped Hollow Carbon for Efficient Oxygen Reduction
Author(s) -
Feng Taotao,
Qin Hancheng,
Zhang Meining
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201801442
Subject(s) - catalysis , materials science , carbon fibers , nanoparticle , zeolitic imidazolate framework , imidazolate , noble metal , chemical engineering , cobalt , pyrolysis , electrochemistry , porosity , nanotechnology , metal , inorganic chemistry , metal organic framework , chemistry , electrode , organic chemistry , composite material , composite number , metallurgy , adsorption , engineering
The rational construction of highly active and stable non‐noble metal electrocatalysts for the oxygen reduction reaction (ORR) is an ongoing challenge for practical applications of catalysts. Here, we report a novel nanostructured hollow N‐doped carbon hybrid through pyrolysis of silica@CoZn‐coordinated zeolitic imidazolate frameworks. The carbon layer encased cobalt nanoparticles were embedded in the hierarchically porous carbon catalyst (Co@C‐HN‐hC). Profiting from the synergistic effect between highly active Co@C NPs and HN‐hC, the Co@C‐HN‐hC catalyst exhibited remarkable catalytic performances as compared to porous N‐doped hollow carbon (N‐hC) and N‐doped carbon encased Co NPs (Co@N‐C). The electrochemical measurements show that the performances of the Co@C‐HN‐hC catalyst is close to that of the Pt/C catalysts, along with an excellent stability and durability in the ORR process. This study provides a guideline for controllable design of carbon‐based ORR catalysts for substituting noble metal catalysts.