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Alkaline hydrogen electrode and oxygen reduction reaction on PtxNi nanoalloys.

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Title: Alkaline hydrogen electrode and oxygen reduction reaction on PtxNi nanoalloys.
Authors: Campos-Roldán, C.A.1,2 (AUTHOR), Calvillo, L.3 (AUTHOR), Granozzi, G.3 (AUTHOR), Alonso-Vante, N.1 (AUTHOR) nicolas.alonso.vante@univ-poitiers.fr
Source: Journal of Electroanalytical Chemistry. Jan2020, Vol. 857, pN.PAG-N.PAG. 1p.
Subjects: Standard hydrogen electrode, Oxygen electrodes, Oxygen reduction, Mass media, Alkaline batteries
Abstract: The electrochemical characterization of chemical carbonyl route generated Pt:Ni nano-alloys, in acid and alkaline media, is reported. Earlier XRD and Debye Function Analysis (DFA) studies (Yang et al., 2004 [ 1 ]) provided the structure of these nanoalloys. Herein, the HER/HOR electrocatalytic activity as well as ORR kinetics, in alkaline medium, was determined and correlated with the interatomic Pt Pt distance. The HER/HOR and ORR exchange current densities describes a Volcano-like plot. For both systems, the maximum activity for both processes peaked with Pt 3 Ni. • Pt:Ni nanoalloy materials were synthesized by the carbonyl chemical route. • The HER/HOR and ORR processes were investigated in alkaline electrolyte. • The nanoalloy with the optimal electrochemical activity was Pt 3 Ni. • The oxophilic effect is favored for the HER/HOR in alkaline electrolyte. • The catalytic center's strain effect is found in the nanoalloy itself. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The electrochemical characterization of chemical carbonyl route generated Pt:Ni nano-alloys, in acid and alkaline media, is reported. Earlier XRD and Debye Function Analysis (DFA) studies (Yang et al., 2004 [ 1 ]) provided the structure of these nanoalloys. Herein, the HER/HOR electrocatalytic activity as well as ORR kinetics, in alkaline medium, was determined and correlated with the interatomic Pt Pt distance. The HER/HOR and ORR exchange current densities describes a Volcano-like plot. For both systems, the maximum activity for both processes peaked with Pt 3 Ni. • Pt:Ni nanoalloy materials were synthesized by the carbonyl chemical route. • The HER/HOR and ORR processes were investigated in alkaline electrolyte. • The nanoalloy with the optimal electrochemical activity was Pt 3 Ni. • The oxophilic effect is favored for the HER/HOR in alkaline electrolyte. • The catalytic center's strain effect is found in the nanoalloy itself. [ABSTRACT FROM AUTHOR]
ISSN:15726657
DOI:10.1016/j.jelechem.2019.113449