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Chitosan Waste‐Derived Co and N Co‐doped Carbon Electrocatalyst for Efficient Oxygen Reduction Reaction
Author(s) -
Xie Shilei,
Huang Senchuan,
Wei Wenjie,
Yang Xinzhe,
Liu Yi,
Lu Xihong,
Tong Yexiang
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500199
Subject(s) - chitosan , catalysis , methanol , electrocatalyst , oxygen reduction reaction , x ray photoelectron spectroscopy , oxygen , limiting current , carbon fibers , materials science , chemistry , nuclear chemistry , limiting , chemical engineering , inorganic chemistry , composite number , electrochemistry , organic chemistry , electrode , composite material , mechanical engineering , engineering
To achieve optimal performance of fuel cells and metal‐air batteries, searching the cost‐effective catalysts with enhanced activity and durability for oxygen reduction reaction (ORR) is highly pursued. We present a new and scalable approach to synthesize low‐cost Co and N co‐doped C (CoNC) catalysts from sustainable organic‐rich chitosan waste. The CoNC designed here involves in chelation between the chitosan and Co ions, shows superior ORR activity. The XPS spectra demonstrate the kinds of ORR active N sites are of high content in the CoNC, which lead to preferable catalytic activity. The TEM images show more highly dispersion of Co, N and C in the CoNC, which contributes to the high ORR activity. The CoNC catalysts exhibit a remarkable limiting current of ∼5.36 mA cm −2 and positive onset potential of −0.105 V (vs. Ag/AgCl), both of which are comparable to those of the commercial Pt/C. Additionally, the optimal CoNC also possesses prominent durability and tolerance of methanol.