TY - JOUR
T1 - High electroactivity performance in Pt/MWCNT and PtNi/MWCNT electrocatalysts
AU - Valenzuela-Muñiz, Ana M.
AU - Alonso-Nuñez, Gabriel
AU - Miki-Yoshida, Mario
AU - Botte, Gerardine G.
AU - Verde-Gómez, Ysmael
N1 - Funding Information:
This work was supported by FORDECYT–CONACYT under project No. 116157 . Also authors recognized the technical support of Carlos Elías Ornelas Gutierrez and Enrique Torres Moye. The authors would also like to acknowledge the support of the Center for Electrochemical Engineering Research at Ohio University for the resources used during the electrochemical testing and for partial financial support.
PY - 2013
Y1 - 2013
N2 - This work presents the synthesis, characterization and electrochemical evaluation of electrocatalysts for PEM fuel cells base on Pt and Pt-Ni nanoparticles over multi-walled carbon nanotubes (MWCNT). The MWCNT were synthesized by spray pyrolysis of toluene, using ferrocene and nickelocene as catalytic agents. The Pt nanoparticles were deposited using the ultrasound assisted aqueous deposition method, followed by either thermal or chemical reduction. The materials were characterized by scanning and transmission electron microscopy, as well as X-ray diffraction. The MWCNT exhibit lengths of 200 μm (using ferrocene) and 30 μm (using nickelocene) and diameters around 50-70 nm. Pt nanoparticles showed sizes between 4 and 8 nm. The electrochemical active area toward the hydrogen oxidation reaction was evaluated by cyclic voltammetry (CV) in a standard three electrodes cell. In addition to corroborate the electrochemical active area, CO stripping tests were done. From both, the CV and CO stripping analyses, it was found that the synthesized electrocatalysts exhibited an electrochemical activity higher (140-230 m 2gr-1) than 10%Pt/Vulcan (Etek).
AB - This work presents the synthesis, characterization and electrochemical evaluation of electrocatalysts for PEM fuel cells base on Pt and Pt-Ni nanoparticles over multi-walled carbon nanotubes (MWCNT). The MWCNT were synthesized by spray pyrolysis of toluene, using ferrocene and nickelocene as catalytic agents. The Pt nanoparticles were deposited using the ultrasound assisted aqueous deposition method, followed by either thermal or chemical reduction. The materials were characterized by scanning and transmission electron microscopy, as well as X-ray diffraction. The MWCNT exhibit lengths of 200 μm (using ferrocene) and 30 μm (using nickelocene) and diameters around 50-70 nm. Pt nanoparticles showed sizes between 4 and 8 nm. The electrochemical active area toward the hydrogen oxidation reaction was evaluated by cyclic voltammetry (CV) in a standard three electrodes cell. In addition to corroborate the electrochemical active area, CO stripping tests were done. From both, the CV and CO stripping analyses, it was found that the synthesized electrocatalysts exhibited an electrochemical activity higher (140-230 m 2gr-1) than 10%Pt/Vulcan (Etek).
KW - CO stripping
KW - Carbon nanotubes
KW - Electrocatalyst
KW - Electrochemical surface area
KW - Fuel cells
KW - PtNi/MWCNT
UR - http://www.scopus.com/inward/record.url?scp=84883789672&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2012.11.134
DO - 10.1016/j.ijhydene.2012.11.134
M3 - Article
AN - SCOPUS:84883789672
VL - 38
SP - 12640
EP - 12647
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 28
ER -