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In‐Liquid Plasma Modified Nickel Foam: NiOOH/NiFeOOH Active Site Multiplication for Electrocatalytic Alcohol, Aldehyde, and Water Oxidation

Hausmann, Jan Niklas; Menezes, Pramod V.; Vijaykumar, Gonela; Laun, Konstantin; Diemant, Thomas 1; Zebger, Ingo; Jacob, Timo 1; Driess, Matthias ; Menezes, Prashanth W.
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

The oxygen evolution reaction (OER) and the value-added oxidation of renewable organic substrates are critical to supply electrons and protons for the synthesis of sustainable fuels. To meet industrial requirements, new methods for a simple, fast, environmental-friendly and cheap synthesis of robust, self-supported and high surface area electrodes are required. Herein, a novel in-liquid plasma (plasma electrolysis) approach for the growth of hierarchical nanostructures on nickel foam is reported on. Under morphology retention, iron can be doped into this high surface area electrode. For the oxidation of 5-(hydroxymethyl)furfural and benzyl alcohol, the iron-free, plasma-treated electrode is more suitable reaching current densities up to 800 mA cm$^{-2}$ with Faradaic efficiencies above 95%. For the OER, the iron-doped nickel foam electrode reaches the industrially relevant current density of 500 mA cm$^{-2}$ at 1.473 ± 0.013$_{VRHE}$ (60 °C) and shows no activity decrease over 140 h. The different effects of iron doping are rationalized using methanol probing and in situ Raman spectroscopy. Furthermore, the intrinsic activity is separated from the number of active sites, and, for the organic oxidation reactions, diffusion limitations are revealed. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000150560
Veröffentlicht am 14.09.2022
Originalveröffentlichung
DOI: 10.1002/aenm.202202098
Scopus
Zitationen: 47
Web of Science
Zitationen: 39
Dimensions
Zitationen: 49
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1614-6832, 1614-6840
KITopen-ID: 1000150560
HGF-Programm 38.02.02 (POF IV, LK 01) Components and Cells
Erschienen in Advanced Energy Materials
Verlag Wiley-VCH Verlag
Band 12
Heft 38
Seiten Art.-Nr.: 2202098
Vorab online veröffentlicht am 21.08.2022
Nachgewiesen in Dimensions
Web of Science
Scopus
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