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From Supramolecular Species to Self‐Templated Porous Carbon and Metal‐Doped Carbon for Oxygen Reduction Reaction Catalysts
Author(s) -
Xie Jin,
Li BoQuan,
Peng HongJie,
Song YunWei,
Li JiaXing,
Zhang ZeWen,
Zhang Qiang
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201814605
Subject(s) - tafel equation , pyrolysis , carbon fibers , supramolecular chemistry , catalysis , chemistry , bond cleavage , metal organic framework , metal , cleavage (geology) , inorganic chemistry , decomposition , porosity , chemical engineering , materials science , combinatorial chemistry , electrochemistry , organic chemistry , molecule , electrode , adsorption , composite material , fracture (geology) , composite number , engineering
The preparation of carbon materials usually involves the decomposition of precursors and the reorganization of the as‐generated fragments. However, the cleavage of bonds and the simultaneous formation of new bonds at nearly the same positions prevents effective yet precise fabrication. Herein, a supramolecular precursor, cucurbit[6]uril, that contains multiple bonds with distinct bond strengths is proposed to decouple the twin problem of simultaneous bond cleavage and formation, allowing multistage transformations to hierarchical porous carbon and metal‐doped carbon in a single yet effective pyrolysis step without the need of a template or additional purification. As a proof‐of‐concept, the Fe‐doped carbon electrocatalysts realized a Pt/C‐like half‐wave potential of 0.869 V vs. RHE and small Tafel slope of 51.3 mV dec −1 in oxygen reduction reaction.