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Publications (7/7 displayed)
- 2013Core-shell catalysts consisting of nanoporous cores for oxygen reduction reactioncitations
- 20123-dimensional imaging of dislocation microstructures by electron beams
- 2012Influence of relative humidity on fracture toughness of rock: Implications for subcritical crack growth
- 2012Influence of relative humidity on fracture toughness of rock: implications for subcritical crack growthcitations
- 2011High-angle triple-axis specimen holder for three-dimensional diffraction contrast imaging in transmission electron microscopycitations
- 2010Pt monolayer on porous Pd-Cu alloys as oxygen reduction electrocatalystscitations
- 2006Microstructure analyses of metal-filled carbon nanotubes synthesized by microwave plasma-enhanced chemical vapor depositioncitations
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article
Pt monolayer on porous Pd-Cu alloys as oxygen reduction electrocatalysts
Abstract
We demonstrate the synthesis of a core-shell catalyst consisting of a Pt monolayer as the shell and porous/hollow Pd-Cu alloy nanoparticles as the core. The porous/hollow Pd-Cu nanoparticles were fabricated by selectively dissolving a less noble metal, Cu, using an electrochemical dealloying process. The Pt mass activity for the oxygen reduction reaction of a Pt monolayer deposited on such a porous core is 3.5 times higher than that of a Pt monolayer deposited on bulk Pd nanoparticles and 14 timeshigherthanthat of state-of-the-artPt/ Celectrocatalysts. © 2010 American Chemical Society.