An Effective PtNi/CNTs Catalyst for the Hydrogen Oxidation Reaction in an Alkaline Electrolyte

V. A. Bogdanovskaya; Богдановская В. А.; I. E. Vernigor; Вернигор И. Е.; M. V. Radina; Радина М. В.; P. A. Sinitsyn; Синицын П. А.; V. N. Andreev; Андреев В. Н.; N. F. Nikol’skaya; Никольская Н. Ф.

doi:10.31857/S0044185623700808

An Effective PtNi/CNTs Catalyst for the Hydrogen Oxidation Reaction in an Alkaline Electrolyte

Authors: Bogdanovskaya V.A.¹^,2, Vernigor I.E.¹^,2, Radina M.V.¹, Sinitsyn P.A.³, Andreev V.N.¹^,2, Nikol’skaya N.F.¹
Affiliations:
1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
2. Samara National Research University
3. Skolkovo Institute of Science and Technology
Issue: Vol 59, No 6 (2023)
Pages: 646-656
Section: НАНОРАЗМЕРНЫЕ И НАНОСТРУКТУРИРОВАННЫЕ МАТЕРИАЛЫ И ПОКРЫТИЯ
URL: https://ruspoj.com/0044-1856/article/view/663962
DOI: https://doi.org/10.31857/S0044185623700808
EDN: https://elibrary.ru/AFPVYS
ID: 663962

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Abstract

PtNi catalysts on carbon nanotubes (CNTs) subjected to preliminary treatment are synthesized and studied in the hydrogen oxidation reaction (HOR) in an alkaline electrolyte. A comparison of the structural and morphological and electrochemical characteristics of monoplatinum (Pt/CNTs) and bimetallic (PtNi/CNTs) catalysts in the HOR at equal concentrations of platinum and the same CNTs is conducted. It is found that catalysts synthesized on nanotubes functionalized in an alkali (CNTsNaOH) are significantly superior to PtNi catalysts synthesized on CNTs doped with nitrogen and monoplatinum catalyst in terms of stability and activity in the HOR. A PtNi/CNTsNaOH catalyst with a weight concentration of platinum of 10% manifests the highest activity in the HOR at a Pt : Ni ratio of 1 : 1. The main parameters providing high characteristics of the bimetallic system are the presence of active sites for the fixation of the metal phase on the CNTsNaOH, concentration of platinum on the surface of the catalyst, and ratio of the metals.

Keywords

bimetallic catalyst, hydrogen oxidation reaction, alkaline electrolyte, carbon nanotubes, nickel oxides, structure, hydrophobic–hydrophilic properties

References

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