Homogeneous Pt-bimetallic Electrocatalysts

Journal Article · Sat Jan 01 04:00:00 EST 2011 · ACS Catalysis

DOI:https://doi.org/10.1021/cs200328z· OSTI ID:1049787

Wang, Chao ^[1]; Chi, Miaofang ^[2]; More, Karren Leslie ^[2]; Markovic, Nenad ^[1]; Stamenkovic, Vojislav ^[1]

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1. Argonne National Laboratory (ANL)
2. ORNL

Alloying has shown enormous potential for tailoring the atomic and electronic structures, and improving the performance of catalytic materials. Systematic studies of alloy catalysts are, however, often compromised by inhomogeneous distribution of alloying components. Here we introduce a general approach for the synthesis of monodispersed and highly homogeneous Pt-bimetallic alloy nanocatalysts. Pt{sub 3}M (where M = Fe, Ni, or Co) nanoparticles were prepared by an organic solvothermal method and then supported on high surface area carbon. These catalysts attained a homogeneous distribution of elements, as demonstrated by atomic-scale elemental analysis using scanning transmission electron microscopy. They also exhibited high catalytic activities for the oxygen reduction reaction (ORR), with improvement factors of 2-3 versus conventional Pt/carbon catalysts. The measured ORR catalytic activities for Pt{sub 3}M nanocatalysts validated the volcano curve established on extended surfaces, with Pt{sub 3}Co being the most active alloy.

• Research Organization: Oak Ridge National Laboratory (ORNL); Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1049787
• Journal Information: ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 10 Vol. 1; ISSN 2155-5435
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
ALLOYS
CARBON
CATALYSTS
DISTRIBUTION
ELECTROCATALYSTS
ELECTRONIC STRUCTURE
FUEL CELLS
OXYGEN
PERFORMANCE
SCANNING ELECTRON MICROSCOPY
SURFACE AREA
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY