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- W3145051054 abstract "• Pd-coated Ni nanowires (PdNi-NWs/C) with a low Pd:Ni molar ratio were first time prepared. • A unique Pd coating with a high catalytic efficiency was achieved by controllable synthesized conditions. • PdNi-NWs/C showed superior catalytic ability in EOR and CO-tolerance compared to palladium nanoparticles (PdNPs/C). • Remarkable improvement in electro-catalytic activity for EOR derived from the addition of Ni and 1D core-shell structure. The major hindrance for a successful commercialization of direct ethanol fuel cells (DEFCs) is the sluggish ethanol oxidation reaction (EOR) and the rapid poisoning of anodic catalysts by by-products. In this work, a high-performance PdNi nanowire (PdNi-NWs) catalyst was prepared via a two-step process in polyol medium based on the galvanic replacement reaction. By carefully screening parameters for a uniform deposition of Pd layers on Ni nanowires, the PdNi-NWs electrode exhibits a significant enhancement of both catalytic activity and durability for the EOR in alkaline media, which may be ascribed to the electronic structure modification and bifunctional electrocatalytic mechanism with hydroxyl and ethanol bindings on Ni and Pd, respectively. Moreover, these nanowire structures are efficient electron and mass transfer and enriched with abundant active sites by oxygen-rich compounds of Ni. The highest electrocatalytic performance has achieved with a low Pd:Ni molar ratio of 18:100, which reaches 9.3 times superior mass activity and the EOR onset potential shifts 50 mV negatively compared with Pd nanoparticles (PdNPs). These results highlight the active role of PdNi-NWs catalysts in DEFCs." @default.
- W3145051054 created "2021-04-13" @default.
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- W3145051054 date "2021-05-01" @default.
- W3145051054 modified "2023-10-18" @default.
- W3145051054 title "High-performance Pd-coated Ni nanowire electrocatalysts for alkaline direct ethanol fuel cells" @default.
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- W3145051054 doi "https://doi.org/10.1016/j.jelechem.2021.115180" @default.
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