Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 89: Focus Session: 2D Transition Metal Carbides, Nitrides and Carbonitrides III (joint session DS/MM/O)

O 89.3: Vortrag

Donnerstag, 21. März 2024, 15:45–16:00, A 053

Cobalt based MXene composites for the Oxygen Evolution Reaction — •Michelle Browne — Young Investigator Group Electrocatalysis: Synthesis to Devices, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, Berlin 14109, Germany

In the Electrocatalysis: Synthesis to Devices Group at HZB, our research is focused on combining MXenes and metal oxides to create the next generation Oxygen Evolution Reaction (OER) catalysts. Metal oxides are known to be active for the OER but lack high conductivity. On the other hand, MXenes are highly conductive but oxidise readily under several conditions due to its termination sites and don't contain OER active sites. To overcome these issues, we employ several strategies in our group to combine these two materials to make one material which is OER active and high conductive. Furthermore, by blocking the MXene termination sites with a metal oxide, this may lead to less oxidation of the MXenes structure. This presentation will focus on the development of Co-based MXene materials for the OER through various fabrication methods and combining Co with other metal oxide materials (e.g. CoCu and CoRu). The OER performance of the MXene/metal oxides composites compared to their parent materials will be discussed. We will also evaluate the various strategies to one another and how the initial activity and stability of the composite materials are affected.

Keywords: MXene; Oxygen Evolution Reaction; Cobalt