Enhanced Catalytic Activity for the Ethanol Oxidation Reaction (EOR) using Novel Pt-Fe3O4/MWCNT Bimetallic Electrocatalyst

Enhanced Catalytic Activity for the Ethanol Oxidation Reaction (EOR) using Novel Pt-Fe3O4/MWCNT Bimetallic Electrocatalyst

P.C. Meléndez González Sagrario M. Montemayor D. Morales Acosta Y. Verde-Gómez B. Escobar F.J. Rodríguez Varela*

Departamento de Materiales Cerámicos, Facultad de Ciencias Químicas, Universidad Autónoma de Coahuila,V. Carranza s/n, Saltillo, Coahuila, México, C.P. 25280.

2Grupo de Sustentabilidad de los Recursos Naturales y Energía, Cinvestav Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial Ramos Arizpe. Ramos Arizpe, Coahuila, C.P. 25900, México.

3Programa de Nanociencias y Nanotecnología, Cinvestav Unidad Saltillo.

Instituto Tecnológico de Cancún, Av. Kabah Km 3, Cancún, Quintana Roo, 77500, México, Quintana Roo, 77500, México

Corresponding Author Email: 
javier.varela@cinvestav.edu.mx, ysmaelverde@yahoo.com
Page: 
067-070
|
DOI: 
https://doi.org/10.14447/jnmes.v17i2.425
Received: 
December 15, 2013
|
Accepted: 
January 25, 2014
|
Published: 
April 15, 2014
| Citation
Abstract: 

In this work, 20% Pt-Fe3O4/MWCNT (Pt:Fe3O4 weight ratio of 80:20) and 20% Pt/MWCNT nanoparticles were synthesized and characterized as anode electrocatalysts in H2SO4 media. First, the electrocatalyst were submitted to accelerated catalyst degradation test (ACDT) by performing 500 cycles between 0.6 and 1.2 V (vs. SHE). Then, their performance for the EOR was evaluated. The magnetite-containing nanoparticles demonstrated to be highly electrochemically stable, with negligible surface area losses (less than 7%) in the hydrogen adsorption/desorption region. Moreover, Pt-Fe3O4/MWCNT showed a significantly enhanced catalytic activity for the EOR when compared to Pt/MWCNT, with almost 46% increase in current density when using Fe3O4 as co-catalysts.

Keywords: 

MWCNTs; magnetite as co-catalyst; Pt-Fe3O4 electrocatalysts; ethanol oxidation reaction; Direct Alcohol Fuel Cells

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
Acknowledgement

We thank CONACYT Mexico (Proyectos Bilaterales) for financing this project under grant No.164251. D.M.A. thanks the support of CONACYT under the Postdoctoral Fellowships Program. Authors also acknowledge the financial support of FOMIX CONACYT–Gob. de Quintana Roo, under grant No. QR00-2011-001-174895.

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