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Anchoring Iron‐EDTA Complex on Graphene toward the Synthesis of Highly Efficient Fe‐N‐C Oxygen Reduction Electrocatalyst for Fuel Cells
Author(s) -
Chang ZhiWen,
Meng FanLu,
Zhong HaiXia,
Zhang XinBo
Publication year - 2018
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201700752
Subject(s) - electrocatalyst , chemistry , graphene , catalysis , chemical engineering , nucleation , cathode , carbon fibers , cathodic protection , inorganic chemistry , oxygen , nanotechnology , electrode , electrochemistry , organic chemistry , composite material , materials science , composite number , engineering
Developing nonprecious carbon electrocatalysts as alternatives to platinum for cathodic oxygen reduction reaction in fuel cells is of significance. Herein, an efficient precursor‐controlled synthesis strategy based on extremely rapid nucleation and deposition process assisted by the liquid nitrogen freeze drying method is explored to anchor cheap iron‐EDTA complex evenly dispersed on graphene to realize microstructural homogeneity of the derived Fe‐N‐C oxygen reduction electrocatalyst. The prepared electrocatalyst possesses excellent performance including high activity with more positive onset and half‐wave potential, such long‐term stability, and anti‐poisoning effect compared to commercial Pt/C. The activity correlates well with the unique sheet‐shaped morphology, high surface area, hierarchical porous structure, and the introduction of Fe‐Nx/C species. Especially, both the assembled practical alkaline and acid fuel cells based on the synthesized cathode catalysts reveal excellent performance with high open‐circuit voltage and power density.