Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

PtNi Catalyst Supported on Ni Foam for Enhanced Oxidation of Formic Acid

Antanas Nacys
* ORCID logo ,
Dijana Simkunaite
,
Aldona Balciunaite
,
Ausrine Zabielaite
,
Daina Upskuviene
,
Ramunas Levinas
,
Vitalija Jasulaitiene
ORCID logo ,
Vitalij Kovalevskij
,
Birute Simkunaite-Stanyniene
,
Loreta Tamasauskaite–Tamasiunaite
ORCID logo ,
Eugenijus Norkus
* ORCID logo
Version 1 : Received: 31 August 2023 / Approved: 1 September 2023 / Online: 4 September 2023 (15:41:47 CEST)

A peer-reviewed article of this Preprint also exists.

Nacys, A.; Simkunaitė, D.; Balciunaite, A.; Zabielaite, A.; Upskuviene, D.; Levinas, R.; Jasulaitiene, V.; Kovalevskij, V.; Simkunaite-Stanyniene, B.; Tamasauskaite-Tamasiunaite, L.; Norkus, E. Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid. Materials 2023, 16, 6427. Nacys, A.; Simkunaitė, D.; Balciunaite, A.; Zabielaite, A.; Upskuviene, D.; Levinas, R.; Jasulaitiene, V.; Kovalevskij, V.; Simkunaite-Stanyniene, B.; Tamasauskaite-Tamasiunaite, L.; Norkus, E. Pt-Coated Ni Layer Supported on Ni Foam for Enhanced Electro-Oxidation of Formic Acid. Materials 2023, 16, 6427.

Abstract

Pt-coated Ni layer supported on Ni foam catalyst (denoted PtNi/Nifoam) was investigated for the oxidation of the formic acid (FAO) in acidic media. The prepared PtNi/Ni foam catalyst was studied as a function of the formic acid (FA) concentration at bare Pt and PtNi/Nifoam catalysts. The catalytic activity of the PtNi/Nifoam catalysts, studied on the basis of the ratio of the direct and indirect current peaks (jd)/(jnd) for the FAO reaction, showed values about 10 times higher compared to those on bare Pt, particularly at a low formic acid concentrations, reflecting the superiority of the former catalysts for the oxidation of FA to CO2. Ni foams provide a large surface area for the FOR while synergistic effects between Pt nanoparticles and Ni-oxy species layer on Ni foams contribute significantly to the enhanced oxidation of FA via the direct pathway, making it almost equal to the indirect pathway, particularly at low formic acid concentrations.

Keywords

platinum; nickel foam; electroless deposition; formic acid; oxidation

Subject

Chemistry and Materials Science, Electrochemistry

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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