Steady‐State Electrocatalytic Activity Evaluation with the Redox Competition Mode of Scanning Electrochemical Microscopy: A Gold Probe and a Boron‐Doped Diamond Substrate - Archive ouverte HAL Access content directly
Journal Articles ChemElectroChem Year : 2020

Steady‐State Electrocatalytic Activity Evaluation with the Redox Competition Mode of Scanning Electrochemical Microscopy: A Gold Probe and a Boron‐Doped Diamond Substrate

(1) , (1) , (1) , (2, 3) , (2) , (2) , (1) , (1)
1
2
3

Abstract

In the current context of energetic transition, investigations of alternative complex systems require tools such as scanning electrochemical microscopy (SECM), offering interesting opportunities as an electroanalytical technique to evaluate innovative catalysts. Herein, we demonstrate how a judicious choice of probe and substrate materials opens up improved performances to achieve steady‐state measurements for oxygen reduction reaction (ORR) catalytic activity detection through redox competition scanning electrochemical microscopy (RC‐SECM). On the probe side, we show that using gold enhances the stability of the local oxygen concentration detection in comparison to the regularly used platinum one. On the substrate side, we evaluate boron‐doped diamond as an appealing alternative to classical support substrate, that shows a low ORR activity, high stability and very good reusability. This work introduces an alternative approach for quantitative measurements with SECM, improving measurement ease, comfort and reproducibility, thus paving the way towards standardized benchmarking and numerical simulation‐based parameter extraction.
Fichier principal
Vignette du fichier
Henrotte_CELC2020_V0.pdf (1.63 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

cea-03014550 , version 1 (19-11-2020)

Identifiers

Cite

Olivier Henrotte, Alice Boudet, Ndrina Limani, Philippe Bergonzo, Bacem Zribi, et al.. Steady‐State Electrocatalytic Activity Evaluation with the Redox Competition Mode of Scanning Electrochemical Microscopy: A Gold Probe and a Boron‐Doped Diamond Substrate. ChemElectroChem, 2020, 7 (22), pp.4633-4640. ⟨10.1002/celc.202001088⟩. ⟨cea-03014550⟩
113 View
187 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More