Pt3M (M: Co, Ni and Fe) Bimetallic Alloy Nanoclusters as Support-Free Electrocatalysts with Improved Activity and Durability for Dioxygen Reduction in PEM Fuel Cells

Pt 3 M (M: Co, Ni and Fe) bimetallic alloy nanoclusters were synthesized by a novel and simple chemical reduction approach, and employed as the promising electrocatalyst to accelerate the kinetics of oxygen reduction reaction (ORR) for polymer electrolyte membrane fuel cells. From XRD, the positive...

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Bibliographic Details
Published inElectrocatalysis Vol. 7; no. 5; pp. 400 - 410
Main Authors Narayanamoorthy, B., Linkov, V., Sita, C., Pasupathi, S.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.09.2016
Springer Nature B.V
Subjects
Accelerated tests
Bimetals
Catalysis
Catalysts
Chemical reduction
Chemistry
Chemistry and Materials Science
Cobalt
Durability
Electrocatalysts
Electrochemistry
Electrolytic cells
Energy Systems
Fuel cells
Iron
Morphology
Nanoclusters
Nickel
Original Research
Physical Chemistry
Platinum
Proton exchange membrane fuel cells
Reaction kinetics
Pt-M alloy
Half-wave potential
Durability
ECSA
ORR
Intrinsic activity
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Summary:Pt 3 M (M: Co, Ni and Fe) bimetallic alloy nanoclusters were synthesized by a novel and simple chemical reduction approach, and employed as the promising electrocatalyst to accelerate the kinetics of oxygen reduction reaction (ORR) for polymer electrolyte membrane fuel cells. From XRD, the positive shift of diffraction angle confirms the alloy formation between Pt and M and the elemental composition was confirmed by energy dispersive X-ray spectroscopy analysis. The nanocluster morphology and particle size was determined using scanning and transmission electron microscopy analysis. The ORR kinetic parameters for Pt-M electrocatalysts were calculated and compared with reported Pt/C catalysts. Among the Pt-M electrocatalysts, Pt-Co was found to be the most efficient catalyst having the higher mass and specific activity (at 0.9 V vs. RHE) of 0.44 mA/μg and 0.69 mA/cm 2 , respectively. The accelerated durability test reveals that the Pt-M bimetallic alloy nanoclusters retain appreciable surface area and mass activity after 8000 potential cycles confirms good long-term durability, and also competing with the reported benchmark ORR catalysts. Graphical Abstract TEM image of Pt 3 Co bimetallic alloy nanocluster with cyclic voltammograms of Pt 3 M (M: Co, Ni & Fe) electrocatalysts
ISSN:1868-2529
1868-5994
DOI:10.1007/s12678-016-0318-x