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Polyhedron-Assembled Ternary PtCuCo Nanochains: Integrated Functions Enhance the Electrocatalytic Performance of Methanol Oxidation at Elevated Temperature
journal contribution
posted on 2019-08-22, 14:39 authored by Bin Luo, Fengling Zhao, Zixuan Xie, Qiang Yuan, Fang Yang, Xiaotong Yang, Chaozhong Li, Zhiyou ZhouRecently, the preparation of a high-performance
one-dimensional alloy nanostructure for fuel cells has been given
increasing attention due to its smart-structure merits and electronic
effect triggered by alloying different kinds of metals at the nanoscale.
In this study, unique ternary PtCuCo nanochains assembled with small
polyhedra are first achieved and used as high-performance anode electrocatalysts
toward methanol oxidation at elevated temperature (60 °C) that
is closer to the operating temperature of direct methanol fuel cells
than room temperature. The specific activity/mass activity of Pt45Cu35Co20 one-dimensional nanochains
can reach up to 18.24 mA cm–2/4.19 A mg–1Pt that is 9.25/10.47 times that of commercial Pt black
in sulfuric acid medium. After a 3600 s durability test, the remaining
current density of Pt45Cu35Co20 one-dimensional
nanochains is 73.3 times that of commercial Pt black. The structure
characterizations show that the high density of surface active sites,
d-band center of the Pt downshift, moderate strain effect, and synergetic
effect are jointly responsible for the enhanced electrocatalytic performance
of one-dimensional ternary PtCuCo nanochains.
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synergetic effectanode electrocatalystsfuel cells73.3 timesPolyhedron-Assembled Ternary PtCuCo NanochainsMethanol Oxidationstructure characterizations showPt 45 Cu 35 Co 20electrocatalytic performanced-band centersmart-structure meritsIntegrated Functions EnhancePt downshiftacid mediumternary PtCuCo nanochainsElevated Temperaturedurability testmethanol fuel cellsmethanol oxidationalloy nanostructurestrain effectElectrocatalytic Performanceroom temperature
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