Electrochemical Active Surface Area Determination of Iridium‐Based Mixed Oxides by Mercury Underpotential Deposition - Matériaux Hybrides et Nanomatériaux Accéder directement au contenu
Article Dans Une Revue ChemElectroChem Année : 2021

Electrochemical Active Surface Area Determination of Iridium‐Based Mixed Oxides by Mercury Underpotential Deposition

Résumé

The electrochemical surface area (ECSA) is a critical property to describe, analyze and compare electrocatalysts. The determination of the mass activity of a given catalyst is associated with this parameter which can thus lead to materials benchmarking. Reliable and robust methods to measure ECSA are needed, and those have to accommodate different structures, morphologies and compositions. In this study, we investigate mercury underpotential deposition (HgUPD) as a way to estimate ECSA for ultraporous electrocatalysts based on iridium and iridium-molybdenum electrocatalysts for the oxygen evolution reaction. Results reveal a clear agreement between physisorption measurements and HgUPD with excellent reproducibility. The method shows also that pre- and post-catalysis surface area measurements are not affected by the catalytic process on short timescale, opening the possibility of electrocalyst stability and degradation monitoring.

Domaines

Autre
Fichier principal
Vignette du fichier
ChemElectroChem.pdf (645.1 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03357385 , version 1 (29-09-2021)

Identifiants

Citer

Silvia Duran, Marine Elmaalouf, Mateusz Odziomek, Jean‐yves Piquemal, Marco Faustini, et al.. Electrochemical Active Surface Area Determination of Iridium‐Based Mixed Oxides by Mercury Underpotential Deposition. ChemElectroChem, 2021, 8 (18), pp.3519-3524. ⟨10.1002/celc.202100649⟩. ⟨hal-03357385⟩
149 Consultations
666 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More