Electrochemical nucleation and growth of Pd/PdCo core–shell nanoparticles with enhanced activity and durability as fuel cell catalyst

2014 ◽  
Vol 2 (13) ◽  
pp. 4588-4597 ◽  
Author(s):  
Milad Rezaei ◽  
Seyed Hadi Tabaian ◽  
Davoud Fatmehsari Haghshenas
Keyword(s):  
Cyclic Voltammetry ◽  
Fuel Cell ◽  
Nucleation And Growth ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Fuel Cell Catalyst ◽  
Enhanced Activity ◽  
Electrochemical Nucleation ◽  
Core Shell Nanoparticles

Cyclic voltammetry curves of Pd NPs and Pd/PdCo core–shell NPs in 0.5 M HCOOH + 0.5 M H2SO4.

Ru@Pt core–shell nanoparticles for methanol fuel cell catalyst: Control and effects of shell composition

2013 ◽  
Vol 38 (36) ◽  
pp. 16631-16641 ◽  
Author(s):  
Navaneethan Muthuswamy ◽  
Jose Luis Gomez de la Fuente ◽  
Dung T. Tran ◽  
John Walmsley ◽  
Mikhail Tsypkin ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Fuel Cell Catalyst ◽  
Shell Composition ◽  
Core Shell Nanoparticles ◽  
Methanol Fuel Cell

scholarly journals Core/Shell Nanoparticles as Electrocatalysts for Fuel Cell Reaction

2008 ◽  
Vol 20 (24) ◽  
Author(s):  
Jin Luo ◽  
Lingyan Wang ◽  
Derrick Mott ◽  
Peter N. Njoki ◽  
Yan Lin ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Core Shell ◽  
Cell Reaction ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

One-step synthesis of carbon-supported Pd@Pt/C core–shell nanoparticles as oxygen reduction electrocatalysts and their enhanced activity and stability

Nanoscale ◽  
2014 ◽  
Vol 6 (8) ◽  
pp. 4038 ◽  
Author(s):  
Yuntaek Lim ◽  
Seok Ki Kim ◽  
Seung-Cheol Lee ◽  
Junghun Choi ◽  
Kee Suk Nahm ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Enhanced Activity ◽  
One Step ◽  
Core Shell Nanoparticles ◽  
Supported Pd

Preparation of Electrocatalysts for Polymer Electrolyte Fuel Cell Cathodes From Au-Pt Core-Shell Nanoparticles Synthesized by Simultaneous Aqueous-Phase Reduction

2013 ◽  
Vol 10 (4) ◽  
Author(s):  
Wataru Yamaguchi ◽  
Yutaka Tai
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Aqueous Phase ◽  
Polymer Electrolyte Fuel Cell ◽  
Pt Catalyst ◽  
Core Shell ◽  
Support Material ◽  
Shell Nanoparticles ◽  
Phase Reduction ◽  
Core Shell Nanoparticles

Electrocatalysts for polymer electrolyte fuel cell (PEFC) cathodes were prepared using Au-Pt core-shell nanoparticles. Polyvinylpyrrolidone (PVP)-protected core-shell nanoparticles were synthesized by simultaneous aqueous-phase reduction of Au and Pt, and they were deposited on carbon black support material. The catalyst powder was thermally processed in air to remove PVP, since the protecting polymers prevent nanoparticles from directly contacting the support material as well as reactant molecules. To avoid sintering during the thermal treatment, the effects of temperature and processing time on sintering were carefully examined. It was found that PVP was selectively oxidized and removed at 170 °C in air without notable damages to the other components of the catalyst. Stability of the core-shell catalyst in water was improved after the removal of PVP. The oxidation state of the Pt shell was found to be very close to zero. The thus-prepared Au-Pt core-shell catalyst for a PEFC cathode exhibited mass activity that was 20% higher than that of pure Pt catalyst.

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