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

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.

scholarly journals Ordered bilayer ruthenium–platinum core-shell nanoparticles as carbon monoxide-tolerant fuel cell catalysts

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Yu-Chi Hsieh ◽  
Yu Zhang ◽  
Dong Su ◽  
Vyacheslav Volkov ◽  
Rui Si ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Fuel Cell ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Fuel Cell Catalysts ◽  
Core Shell Nanoparticles

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

Ni@M (M = Pt, Pd and Ru) core@shell nanoparticles on a Vulcan XC-72R support with superior catalytic activity toward borohydride oxidation: electrochemical and fuel cell studies

2017 ◽  
Vol 41 (22) ◽  
pp. 13408-13417 ◽  
Author(s):  
M. G. Hosseini ◽  
R. Mahmoodi
Keyword(s):  
Catalytic Activity ◽  
Fuel Cell ◽  
Power Density ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Borohydride Oxidation ◽  
Core Shell Nanoparticles

Ni@Pd/C has excellent catalytic activity and power density for borohydride oxidation in comparison with Ni@Pt/C and Ni@Ru/C.

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