Core-Shell Structured PtRuCo x Nanoparticles on Carbon Nanotubes as Highly Active and Durable Electrocatalysts for Direct Methanol Fuel Cells
MetadataShow full item record
Ternary alloy PtRuCox nanoparticles (NPs) with Co-rich core and PtRu skinned shell on carbon nanotubes (CNTs) have been successfully synthesized as electrocatalysts for methanol oxidation reaction (MOR) of direct methanol fuel cells (DMFCs) via a successive dealloying and annealing treatment of PtRuCo alloy particles. The best results were obtained on dealloyed PtRuCox NPs annealed at 450 °C in argon with x = 0.48, characterizing by a ~1 nm thick Co-free PtRu shell. The core–shell structured PtRuCox catalysts exhibit a high activity for MOR, 400 A g−1pt measured at 0.40 V (vs Ag/AgCl), almost 4 times higher than 104 A g−1Pt for the reaction on the PtRuCo alloy before deallaying and annealing treatment. The core–shell structured PtRuCox NPs also show excellent structural stability; maintaining 74% of the activity after 1000 cycle between −0.2 to 1.0 V (vs. Ag/AgCl), significantly higher than 49% for PtRuCo and 25% for the conventional PtRu/C catalysts. The results demonstrate that the successive dealloying and annealing treatment is very effective to synthesize core–shell structured PtRuCox ternary alloy electrocatalysts with high activity and durability for DMFCs.
Showing items related by title, author, creator and subject.
Core-Shell Structured PtRuCo<inf>x</inf> Nanoparticles on Carbon Nanotubes as Highly Active and Durable Electrocatalysts for Direct Methanol Fuel CellsCheng, Yi; Shen, P.; Saunders, M.; Jiang, San Ping (2015)© 2015 Elsevier Ltd. Ternary alloy PtRuCo<inf>x</inf> nanoparticles (NPs) with Co-rich core and PtRu skinned shell on carbon nanotubes (CNTs) have been successfully synthesized as electrocatalysts for methanol oxidation ...
Enhanced activity and stability of core-shell structured PtRuNix electrocatalysts for direct methanol fuel cellsCheng, Yi; Shen, P.; Jiang, San Ping (2016)© 2015 Hydrogen Energy Publications, LLC. Core-shell structured PtRuNix nanoparticles (NPs) with Ni-rich core and PtRu-rich shell are successfully synthesized on poly(ethyleneimine) functionalized carbon nanotubes (CNTs) ...
Catalysts of self-assembled Pt@CeO<inf>2âˆ’Î´</inf>-rich core-shell nanoparticles on 3D ordered macroporous Ce<inf>1âˆ’x</inf>Zr<inf>x</inf>O<inf>2</inf>for soot oxidation: nanostructure-dependent catalytic activityWei, Y.; Jiao, J.; Zhang, X.; Jin, B.; Zhao, Z.; Xiong, J.; Li, Y.; Liu, Jian; Li, J. (2017)Â© The Royal Society of Chemistry. The catalytic performance in heterogeneous catalytic reactions consisting of solid reactants is strongly dependent on the nanostructure of the catalysts. Metal-oxides core-shell (MOCS) ...