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Main Title: Iron and Manganese Containing Multi‐Walled Carbon Nanotubes as Electrocatalysts for the Oxygen Evolution Reaction ‐ Unravelling Influences on Activity and Stability
Author(s): Broicher, Cornelia
Zeng, Feng
Pfänder, Norbert
Frisch, Marvin
Bisswanger, Timo
Radnik, Jörg
Stockmann, Jörg Manfred
Palkovits, Stefan
Beine, Anna Katharina
Palkovits, Regina
Type: Article
Abstract: Hydrogen economy is a central aspect of future energy supply, as hydrogen can be used as energy storage and fuel. In order to make water electrolysis efficient, the limiting oxygen evolution reaction (OER) needs to be optimized. Therefore, C‐based composite materials containing earth‐abundant Fe and Mn were synthesized, characterized and tested in the OER. For pyrolysis temperatures above 700 °C N‐rich multi‐walled carbon nanotubes (MWCNT) are obtained. Inside the tubes Fe3C particles are formed, Fe and Mn oxides are incorporated in the carbon matrix and metal spinel nanoparticles cover the outer surface. The best catalyst prepared at 800 °C achieves a low overpotential of 389 mV (at 10 mA/cm2) and high stability (22.6 h). From electrochemical measurements and characterization it can be concluded that the high activity is mainly provided by MWCNT, Fe3C and the metal oxides in the conductive carbon matrix. The metal spinel nanoparticles in contrast protect the MWCNT from oxidation and thereby contribute to the high stability.
Subject(s): oxygen evolution reaction
multi‐walled carbon nanotubes
Issue Date: 24-Sep-2020
Date Available: 16-Dec-2020
Language Code: en
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Sponsor/Funder: BMBF, 03SF0508, Clusterprojekt "MANGAN"; Teilprojekt: Entwicklung neuartiger Mangankomplexe zur elektrokatalytischen Generierung von Sauerstoff und Wasserstoff aus Wasser
Journal Title: ChemCatChem
Publisher: Wiley
Volume: 12
Issue: 21
Publisher DOI: 10.1002/cctc.202000944
Page Start: 5378
Page End: 5384
EISSN: 1867-3899
ISSN: 1867-3880
TU Affiliation(s): Fak. 2 Mathematik und Naturwissenschaften » Inst. Chemie » FG Technische Chemie
Appears in Collections:Technische Universität Berlin » Publications

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