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

Crystals

Daina Upskuvienė¹  Vitalij Kovalevskij¹  Loreta Tamašauskaitė-Tamašiūnaitė¹  Benjaminas Šebeka¹  Antanas Nacys¹  Aušrinė Zabielaitė¹  Dijana Šimkūnaitė¹  Aldona Balčiūnaitė¹  Eugenijus Norkus¹  Vitalija Jasulaitienė¹ 

[1] Center for Physical Sciences and Technology, Sauletekio Avenue 3, LT-10257 Vilnius, Lithuania;

关键词: platinum;    nickel foam;    electroless deposition;    formate;    oxidation;   

DOI  :  10.3390/cryst12030362

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown