• 文献标题:   Anchoring Iron-EDTA Complex on Graphene toward the Synthesis of Highly Efficient Fe-N-C Oxygen Reduction Electrocatalyst for Fuel Cells
  • 文献类型:   Article
  • 作  者:   CHANG ZW, MENG FL, ZHONG HX, ZHANG XB
  • 作者关键词:   ironedta complex, ironnitrogendoping carbon, porous nanosheet, oxygen reduction reaction, fuel cell
  • 出版物名称:   CHINESE JOURNAL OF CHEMISTRY
  • ISSN:   1001-604X EI 1614-7065
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   6
  • DOI:   10.1002/cjoc.201700752
  • 出版年:   2018

▎ 摘  要

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, a 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.