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Enhancing electrocatalytic activity through liquid-phase exfoliation of NiFe layered double hydroxide intercalated with metal phthalocyanines in the presence of graphene

  • Earth‐abundant transition‐metal‐based catalysts are attractive for alkaline water electrolysis. However, their catalytic properties are often limited by their poor electrical conductivity. Here, we present a strategy for enhancing the electrical conductivity of NiFe layered double hydroxide (LDH) in order to further improve its properties as an electrocatalyst for the oxygen evolution reaction (OER) in alkaline media. We show that NiFe LDH containing metal tetrasulfonate phthalocyanine in the interlayers between the NiFe oxide galleries can be coupled with graphene during liquid‐phase exfoliation by taking advantage of their \(\pi\)‐\(\pi\) stacking capabilities. A substantial enhancement in the electrocatalytic activity of NiFe LDH with respect to the OER was observed. Moreover, the activity and selectivity of the catalyst materials towards the oxygen reduction reaction were investigated, demonstrating that both the metal hydroxide layer and the interlayer species contribute to the electrocatalytic performance of the composite material.

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Author:Dulce M. MoralesORCiDGND, Stefan BarweGND, Eugeniu VasileGND, Corina AndronescuORCiDGND, Wolfgang SchuhmannORCiDGND
Parent Title (English):ChemPhysChem
Place of publication:Wiley-VCH Verlag
Document Type:Article
Date of Publication (online):2020/05/19
Date of first Publication:2019/11/19
Publishing Institution:Ruhr-Universität Bochum, Universitätsbibliothek
Tag:electrical conductivity; graphene; layered double hydroxide; liquid-phase exfoliation; oxygen evolution reaction
First Page:3030
Last Page:3036
Dieser Beitrag ist auf Grund des DEAL-Wiley-Vertrages frei zugänglich.
Institutes/Facilities: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