Electrooxidation of hydrogen on nanostructured Pt/C catalysts for polymer electrolyte fuel cells
Abstract
Mesoporous carbon cryogel synthesized by sol-gel polycondensation and freeze-drying with specific surface area (BET) of 517 m(2) g(-1) was used as a catalyst support. Pt/C catalysts were prepared by a modified ethylene glycol method (EG). Transmission electron microscopy (TEM) images show that the dispersion of the catalyst is very uniform with a mean particle size of about 2.65 nm. Hydrogen oxidation reaction (HOR) was studied on Pt/C catalyst in 0.5 mol dm(-3) HClO4 acid solution. It has been found that HOR appears as a reversible two-electron direct discharged reaction (Tafel slope for this reaction is approximate to 30mV dec(-1)) and that Pt/C catalyst exhibits a very high catalytic activity. However, the corresponding value of the exchange current density obtained by dividing the exchange current by the active surface area of Pt particles has the same order of magnitude as those for the HOR in acidic solution at single crystal and polycrystalline Pt.
Keywords:
carbon cryogel / hydrogen oxidation / platinum catalystSource:
Materials Science Forum, 2006, 518, 283-288Note:
- Recent Developments in Advanced Materials and Processes, 7th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS), Sep 12-16, 2005, Herceg Novi, Montenegro
DOI: 10.4028/www.scientific.net/MSF.518.283
ISSN: 0255-5476
WoS: 000239351800047
Scopus: 2-s2.0-37849011585
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VinčaTY - JOUR AU - Babić, Biljana M. AU - Radmilović, Velimir AU - Krstajic, N. AU - Kaluđerović, Branka V. PY - 2006 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6606 AB - Mesoporous carbon cryogel synthesized by sol-gel polycondensation and freeze-drying with specific surface area (BET) of 517 m(2) g(-1) was used as a catalyst support. Pt/C catalysts were prepared by a modified ethylene glycol method (EG). Transmission electron microscopy (TEM) images show that the dispersion of the catalyst is very uniform with a mean particle size of about 2.65 nm. Hydrogen oxidation reaction (HOR) was studied on Pt/C catalyst in 0.5 mol dm(-3) HClO4 acid solution. It has been found that HOR appears as a reversible two-electron direct discharged reaction (Tafel slope for this reaction is approximate to 30mV dec(-1)) and that Pt/C catalyst exhibits a very high catalytic activity. However, the corresponding value of the exchange current density obtained by dividing the exchange current by the active surface area of Pt particles has the same order of magnitude as those for the HOR in acidic solution at single crystal and polycrystalline Pt. T2 - Materials Science Forum T1 - Electrooxidation of hydrogen on nanostructured Pt/C catalysts for polymer electrolyte fuel cells VL - 518 SP - 283 EP - 288 DO - 10.4028/www.scientific.net/MSF.518.283 ER -
@article{ author = "Babić, Biljana M. and Radmilović, Velimir and Krstajic, N. and Kaluđerović, Branka V.", year = "2006", abstract = "Mesoporous carbon cryogel synthesized by sol-gel polycondensation and freeze-drying with specific surface area (BET) of 517 m(2) g(-1) was used as a catalyst support. Pt/C catalysts were prepared by a modified ethylene glycol method (EG). Transmission electron microscopy (TEM) images show that the dispersion of the catalyst is very uniform with a mean particle size of about 2.65 nm. Hydrogen oxidation reaction (HOR) was studied on Pt/C catalyst in 0.5 mol dm(-3) HClO4 acid solution. It has been found that HOR appears as a reversible two-electron direct discharged reaction (Tafel slope for this reaction is approximate to 30mV dec(-1)) and that Pt/C catalyst exhibits a very high catalytic activity. However, the corresponding value of the exchange current density obtained by dividing the exchange current by the active surface area of Pt particles has the same order of magnitude as those for the HOR in acidic solution at single crystal and polycrystalline Pt.", journal = "Materials Science Forum", title = "Electrooxidation of hydrogen on nanostructured Pt/C catalysts for polymer electrolyte fuel cells", volume = "518", pages = "283-288", doi = "10.4028/www.scientific.net/MSF.518.283" }
Babić, B. M., Radmilović, V., Krstajic, N.,& Kaluđerović, B. V.. (2006). Electrooxidation of hydrogen on nanostructured Pt/C catalysts for polymer electrolyte fuel cells. in Materials Science Forum, 518, 283-288. https://doi.org/10.4028/www.scientific.net/MSF.518.283
Babić BM, Radmilović V, Krstajic N, Kaluđerović BV. Electrooxidation of hydrogen on nanostructured Pt/C catalysts for polymer electrolyte fuel cells. in Materials Science Forum. 2006;518:283-288. doi:10.4028/www.scientific.net/MSF.518.283 .
Babić, Biljana M., Radmilović, Velimir, Krstajic, N., Kaluđerović, Branka V., "Electrooxidation of hydrogen on nanostructured Pt/C catalysts for polymer electrolyte fuel cells" in Materials Science Forum, 518 (2006):283-288, https://doi.org/10.4028/www.scientific.net/MSF.518.283 . .