The sum is more than its parts
- Successful design of reversible oxygen electrocatalysts does not only require to consider their activity towards the oxygen reduction (ORR) and the oxygen evolution reactions (OER), but also their electrochemical stability at alternating ORR and OER operating conditions, which is important for potential applications in reversible electrolyzers/fuel cells or metal/air batteries. We show that the combination of catalyst materials containing stable ORR active sites with those containing stable OER active sites may result in a stable ORR/OER catalyst if each of the active components can satisfy the current demand of their respective reaction. We compare the ORR/OER performances of oxides of Mn (stable ORR active sites), Fe (stable OER active sites), and bimetallic \(Mn_{0.5}Fe_{0.5}\) (reversible ORR/OER catalyst) supported on oxidized multi-walled carbon nanotubes. Despite the instability of Mn and Fe oxide for the OER and the ORR, respectively, \(Mn_{0.5}Fe_{0.5}\) exhibits high stability for both reactions.
| Author: | Dulce M. MoralesORCiDGND, Mariya A. KazakovaORCiDGND, Maximilian PurcelGND, Justus MasaORCiDGND, Wolfgang SchuhmannORCiDGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-91180 |
| DOI: | https://doi.org/10.1007/s10008-020-04667-2 |
| Parent Title (English): | Journal of solid state electrochemistry |
| Subtitle (English): | stability of MnFe oxide nanoparticles supported on oxygen-functionalized multi-walled carbon nanotubes at alternating oxygen reduction reaction and oxygen evolution reaction conditions |
| Publisher: | Springer |
| Place of publication: | Berlin |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2022/07/19 |
| Date of first Publication: | 2020/06/01 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Tag: | Bifunctional oxygen electrodes; Electrocatalysis; Iron oxide; Manganese oxide; Multi-walled carbon nanotubes; Stability |
| Volume: | 24 |
| First Page: | 2901 |
| Last Page: | 2906 |
| Note: | Dieser Beitrag ist auf Grund des DEAL-Springer-Vertrages frei zugänglich. |
| 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): |  Creative Commons - CC BY 4.0 - Attribution 4.0 International |
