Investigation of the oxygen reduction kinetics and mechanism on ordered mesoporouscarbon-supported Pt-based catalysts
نویسندگان
چکیده
The kinetics and mechanism of oxygen reduction reaction (ORR) on the surface Pt PtAgFe catalysts supported by ordered mesoporous carbon (OMC) were investigated. Metal particles loaded wet impregnation-reduction method two types OMC, one being surface-modified HNO3 other unmodified. Cyclic voltammetry measurements showed that modified namely Pt/OMC-M, had highest electroactive area among OMC-supported catalyts with 987 cm2/mg. This catalyst also a mass activity 39.1 mA/mgPt, which was same as black commercial Pt/C catalyst. Rotating disk electrode (RDE) studies revealed net number transferred electrons for OMC in range between 3 4, indicating predominant 4-electron water formation route. ORR mechanisms Pt/OMC PtAgFe/ found to be similar Pt/C; however, associative pronounced at wider potential range. higher activities general.
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ژورنال
عنوان ژورنال: Turkish Journal of Chemistry
سال: 2022
ISSN: ['1300-0527', '1303-6130']
DOI: https://doi.org/10.55730/1300-0527.3326