Title :
Platinum-Iron Alloy Nanoparticles Dispersed Multiwalled Carbon Nanotubes As Cathode Electrocatalyst for PEMFC
Author :
Vinayan, B.P. ; Sahoo, Madhumita ; Ramaprabhu, Sundara
Author_Institution :
Dept. of Phys., Indian Inst. of Technol. Madras (IITM), Chennai, India
Abstract :
The performance of platinum nanoparticles dispersed functionalized multiwalled carbon nanotubes (Pt/f-MWNTs) and platinum-iron alloy nanoparticles dispersed functionalized multiwalled carbon nanotubes (Pt3Fe/f-MWNTs) electrocatalysts have been investigated for oxygen reduction reaction in a polymer electrolyte membrane fuel cell. The electrocatalysts have been synthesized by sodium borohydride reduction method. Pt3Fe/f-MWNTs give the highest performance with a maximum power density of 432 mWcm-2 at 60°C without any back pressure. The enhanced catalytic activity of Pt3Fe/f-MWNTs towards ORR is due to proper alloying, uniform dispersion and optimum particle size of Pt3Fe alloy nanoparticles over the surface of f-MWNTs.
Keywords :
carbon nanotubes; catalysis; catalysts; disperse systems; electrochemical electrodes; electrochemistry; iron alloys; nanoparticles; oxidation; particle size; platinum alloys; proton exchange membrane fuel cells; reduction (chemical); ORR; PEMFC; PtFe-C; catalytic activity; cathode electrocatalyst; oxygen reduction reaction; particle size; platinum-iron alloy nanoparticles dispersed functionalized multiwalled carbon nanotube; polymer electrolyte membrane fuel cell; power density; sodium borohydride reduction method; temperature 60 degC; Carbon nanotubes; Cathodes; Fuel cells; Iron; Nanoparticles; Surface morphology;
Conference_Titel :
Nanoscience, Technology and Societal Implications (NSTSI), 2011 International Conference on
Conference_Location :
Bhubaneswar
Print_ISBN :
978-1-4577-2035-2
DOI :
10.1109/NSTSI.2011.6111795
