TY - JOUR
T1 - Spectroscopic studies of heat-treated FeNxCy/C involved in electrochemical oxygen reduction under acid media
AU - Liu, Shou Heng
AU - Wu, Jyun Ren
N1 - Funding Information:
Financial support of this work from the Ministry of Science and Technology of Taiwan (Contract No.: NSC99-2221-E-151-044-MY2) is gratefully acknowledged.
PY - 2015/3/15
Y1 - 2015/3/15
N2 - 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.
AB - 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.
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U2 - 10.1016/j.saa.2014.12.081
DO - 10.1016/j.saa.2014.12.081
M3 - Article
C2 - 25574650
AN - SCOPUS:84920720439
SN - 1386-1425
VL - 139
SP - 313
EP - 320
JO - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
JF - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
ER -