Spectroscopic studies of heat-treated FeNxCy/C involved in electrochemical oxygen reduction under acid media

Shou Heng Liu, Jyun Ren Wu

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Carbon-incorporated FeNx electrocatalysts (FeNC/C-T) have been synthesized by carbonizing a nitrogen-containing specie and iron precursor on carbon blacks at various heat-treated temperatures. The catalyst properties (crystalline structure, surface chemical states, oxidation state and co-ordination geometry) and their formation scheme of FeNC/C-T have been thoroughly examined by X-ray based spectroscopies such as X-ray diffraction, X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The electrochemical performance of oxygen reduction reaction (ORR) and methanol tolerance were also investigated by rotating disk electrode tests in 0.5 M H2SO4. By combined results from XPS and XAS spectroscopies, the catalysts carbonized at 1073 K possess higher surface Fe/C and N/C atomic ratios with formation of carbons incorporated FeN4 species were found to have the optimal electrocatalytic properties.

Original languageEnglish
Pages (from-to)313-320
Number of pages8
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume139
DOIs
Publication statusPublished - 2015 Mar 15

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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