4.6 Article

An Enhanced Oxidation of Formate on PtNi/Ni Foam Catalyst in an Alkaline Medium

Journal

CRYSTALS
Volume 12, Issue 3, Pages -

Publisher

MDPI
DOI: 10.3390/cryst12030362

Keywords

platinum; nickel foam; electroless deposition; formate; oxidation

Funding

  1. European Union Structural Funds project Development of Doctoral Studies [09.3.3.-ESFA-V-711-01-0001]

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In this study, a platinum-coated Ni foam catalyst showed enhanced electrocatalytic activity for the oxidation of formate in an alkaline medium. It promoted the reaction at more negative potentials than a pure Pt electrode, indicating high activity. The catalyst also proceeded the reaction via a direct pathway mechanism without significant accumulation of poisonous carbonaceous species.
In this study, a platinum-coated Ni foam catalyst (denoted PtNi/Ni foam) was investigated for the oxidation of the formate reaction (FOR) in an alkaline medium. The catalyst was fabricated via a two-step procedure, which involved an electroless deposition of the Ni layer using sodium hypophosphite as a reducing agent and the subsequent electrodeposition of the platinum layer. The PtNi/Ni foam catalyst demonstrated enhanced electrocatalytic activity for the FOR in an alkaline medium compared to the Ni/Ni foam catalyst and pure Pt electrode. Moreover, the PtNi/Ni foam catalyst promoted the FOR at more negative potentials than the Pt electrode. This contributed to a significant negative shift in the onset potential, indicating the high activity of the catalyst. Notably, in alkaline media with the PtNi/Ni foam catalyst, the FOR proceeds via a direct pathway mechanism without significant accumulation of poisonous carbonaceous species on the PtNi/Ni foam catalyst.

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