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Multiple Metal (Cu, Mn, Fe) Centered Species Simultaneously Combined Nitrogen‐doped Graphene as an Electrocatalyst for Oxygen Reduction in Alkaline and Neutral Solutions
Author(s) -
Lu Lei,
Fan Jiawei,
Lei Wu,
Ouyang Yu,
Yao Di,
Xia Xifeng,
Hao Qingli
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201800152
Subject(s) - electrocatalyst , catalysis , graphene , methanol , materials science , metal , nitrogen , oxygen , inorganic chemistry , amorphous solid , oxygen reduction reaction , doping , nanoparticle , chemistry , chemical engineering , nanotechnology , electrochemistry , electrode , crystallography , metallurgy , organic chemistry , optoelectronics , engineering
A new efficient composite catalyst (Cu I MnFe III O/NG) for oxygen reduction reaction (ORR) in both alkaline and neutral media, is successfully prepared via a facile, clean, low‐cost and reproducible solvothermal method without any further treatments. The nanoparticles consisting of crystalline phases of Fe 2 O 3 , MnCO 3 and amorphous Cu 2 O&Mn x O y (Cu I MnO), are anchored on nitrogen‐doping graphene (N/C atomic ratio up to 10.56 %), which offer various active sites toward ORR. The synergistic catalytic effect between these components affords excellent ORR performance with comparable onset potential and current density to commercial Pt/C in both pH‐situations, and a 4‐electron‐transfer path during oxygen reduction. Furthermore, comparative experiment results are discussed to describe the different degrees of ORR contribution in different medium from metal species and nitrogen doping. Meanwhile, superior methanol tolerance and high stability of Cu I MnFe III O/NG can make it a promising alternative for expensive commercial Pt‐based electrocatalysts in corresponding alkaline and neutral fuel cells.