Abstracts Book - IMRC 2018

• SC1-P029
Pt3Fe/C BIMETALLIC ALLOY NANOPARTICLES AS
ELECTROCATALYSTS WITH IMPROVED ACTIVITY FOR THE
OXYGEN REDUCTION REACTION
Miriam Marisol Tellez Cruz 1 , Miguel Adrian Padilla Islas 1 , Heriberto Cruz Martínez 2 , Hilda
Margarita Alfaro López 1 , María Guadalupe Salinas Juárez 1 , Omar Solorza Feria 1
1 Centro de Investigación y de Estudios Avanzados del IPN - CINVESTAV, Química, Mexico.
2 Centro de Investigación y de Estudios Avanzados del IPN - CINVESTAV, Doctorado en
Nanociencias y Nanotecnología, Mexico.
The synthesis of octahedral and octopods nanocatalysts of Pt 3 Fe for oxygen
reduction reaction (ORR) in acid media is presented. Catalysts were prepared
through chemical reaction (ORR) in acid media is presented. Catalysts were
prepared through chemical reduction with the correct amount of oleylamine, oleic
acid, and precursor salts (Pt(acac) 2 and Fe(acac) 3 ). In one of the two syntheses, we
use dibenzyl ether and tungsten hexacarbonyl (W(CO) 6 ) as the solvent and reducing
agent respectively. Subsequent, both catalysts were dispersing in a carbon matrix
(Vulcan Carbon) previously thermally treated. The presence of the alloy Pt 3 Fe in the
nanoparticles was proved by XRD. STEM micrographs showed the morphology of
the nanoparticles with an average 7-9 nm for octahedral and 12-14 nm in size for
octopods. The electrochemical performance of Pt 3 Fe/C was evaluated by cyclic
voltammetry, CO stripping and rotating disk electrode in HClO 4 as the electrolyte
with the Autolab PGSTAT302N. Octopods of Pt 3 Fe/C nanocatalyst showed the best
catalytic activity regarding mass activity and specific activity than commercially
available 20-wt% Pt /C-Etek® catalyst. Therefore, this finding suggests a
methodology for producing a carbon supported octopods nanocatalyst, which
could be used as a cathode electrode in a PEM fuel cell.
Acknowledgment:
The authors M.M. T.-C. and H. C.-M. acknowledge the financial support provided
through CONACYT for their doctoral fellowships. M.G. S.-J. acknowledges
CONACYT-SENER for her postdoctoral fellowship. The authors also appreciate
financial support from CONACYT through grant 245920.
Keywords: Pt3Fe alloy, Oxygen Reduction Reaction, nanocatalysts PEMFCs
Presenting authors email: mtellez@cinvestav.mx