Scrutinizing intrinsic oxygen reduction reaction activity of a Fe−N−C catalyst via scanning electrochemical cell microscopy

  • Carbon-based nanomaterials are renowned for their exceptional properties, making them propitious candidates for oxygen reduction reaction (ORR) electrocatalysis. However, their intrinsic activity is often challenging to investigate unambiguously with conventional methodologies due to the inherent complexities of such systems and the material itself. Zooming into the material and gaining electrochemical information with high resolution is a way to get rid of many experimental factors that influence the catalytic activity in macro-scale measurements. Herein, we employ nano-scale scanning electrochemical cell microscopy (SECCM) to investigate individual catalyst agglomerates with and without Nafion content. The intrinsic ORR activity of the catalyst was unravelled by using a unique approach of normalizing the data of all measured points by their distinctive electrochemical surface area (ECSA). When coupling with scanning electron microscopy (SEM), the structure and morphology of the catalytically active agglomerates were visualized.

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Author:Ndrina LimaniORCiDGND, Emmanuel Batsa TettehGND, Moonjoo KimGND, Thomas QuastORCiDGND, Emmanuel ScorsoneGND, Bruno JousselmeORCiDGND, Wolfgang SchuhmannORCiDGND, Renaud CornutORCiDGND
Parent Title (English):ChemElectroChem
Place of publication:Weinheim
Document Type:Article
Date of Publication (online):2024/01/30
Date of first Publication:2023/02/15
Publishing Institution:Ruhr-Universität Bochum, Universitätsbibliothek
Tag:Open Access Fonds
intrinsic activity; multi-walled carbon nanotubes; oxygen reduction reaction; scanning electrochemical cell microscopy; scanning electron microscopy
Issue:6, Article e202201095
First Page:e202201095-1
Last Page:e202201095-6
Article Processing Charge funded by the Deutsche Forschungsgemeinschaft (DFG) and the Open Access Publication Fund of Ruhr-Universität Bochum.
Institutes/Facilities:Lehrstuhl für Analytische Chemie und Zentrum für Elektrochemie
Dewey Decimal Classification:Naturwissenschaften und Mathematik / Chemie, Kristallographie, Mineralogie
open_access (DINI-Set):open_access
faculties:Fakultät für Chemie und Biochemie
Licence (English):License LogoCreative Commons - CC BY 4.0 - Attribution 4.0 International