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.
| Author: | Dulce M. MoralesORCiDGND, Stefan BarweGND, Eugeniu VasileGND, Corina AndronescuORCiDGND, Wolfgang SchuhmannORCiDGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-71661 |
| DOI: | https://doi.org/10.1002/cphc.201900577 |
| Parent Title (English): | ChemPhysChem |
| Publisher: | Weinheim |
| Place of publication: | Wiley-VCH Verlag |
| Document Type: | Article |
| Language: | English |
| 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 |
| Volume: | 20 |
| Issue: | 22 |
| First Page: | 3030 |
| Last Page: | 3036 |
| Note: | 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): |  Creative Commons - CC BY 4.0 - Attribution 4.0 International |
