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N‐rich mesoporous carbon supported CoNC and FeNC catalysts derived from o‐phenylenediamine for oxygen reduction reaction
Author(s) -
Zhu Zhaoqi,
Cui Jie,
Han Jingxin,
Wu Shujuan,
Sun Hanxue,
Liang Weidong,
Li An
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6682
Subject(s) - catalysis , limiting current , pyrolysis , methanol , mesoporous material , dopant , chemistry , carbon fibers , pyridine , materials science , chemical engineering , metal , inorganic chemistry , nuclear chemistry , doping , electrochemistry , organic chemistry , electrode , optoelectronics , composite material , composite number , engineering
Summary The exploitation of high efficiency non‐precious electrocatalysts for oxygen reduction reaction (ORR) is of great significance for large‐scale commercialization of next‐generation fuel cells. Herein, we report the synthesis of conjugated polymers (CP) based on poly(o‐phenylenediamine) as a nitrogen‐containing precursor for preparation of Co‐ and FeCl 3 ‐doped N‐rich carbon for ORR (abbreviated as Co‐OPD and FeCl 3 ‐OPD). Based on their high specific surface, excellent porosity and large pyridine nitrogen content, the as‐synthesized FeCl 3 ‐OPD, which is prepared at a pyrolysis temperature of 800°C (FeCl 3 ‐OPD‐800), exhibits highest catalytic activity among the resulting electrocatalysts, that is, it possesses a largest half‐wave potential of 0.854 V (≈20 mV more positive than Pt/C), a high diffusion limiting current density of 3.95 mA cm −2 and a biased 4e − reaction pathway. In addition, this catalyst also discloses an excellent methanol tolerance and better durability than the commercial Pt/C. Taking advantage of their high ORR activity as well as simple fabrication which makes it possible using inexpensive FeCl 3 as both catalysts for CP precursors and metal dopant for FeCl 3 ‐OPD only by a one‐step pyrolysis, thus such FeCl 3 ‐OPD may hold great potentials as promising alternative of precious metal catalysts for next generation fuel cells.