Enhanced Catalytic Activity for the Ethanol Oxidation Reaction (EOR) using Novel Pt-Fe3O4/MWCNT Bimetallic Electrocatalyst
OPEN ACCESS
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.
MWCNTs; magnetite as co-catalyst; Pt-Fe3O4 electrocatalysts; ethanol oxidation reaction; Direct Alcohol Fuel Cells
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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