Material of the Month
June 2019
Unravelling Structure - Activity Relationships in Electrocatalysis

In the electrolysis of water and/or CO2, the anode reaction is the oxygen evolution reaction (OER), which is typically catalyzed by rare, expensive materials. Our recently published work focuses on understanding how the surface structure of the catalyst influences the OER. Combining electrochemistry, in-situ Raman spectroscopy and density functional theory (DFT) calculations we could identify specific surface orientations that exhibit improved OER performance.
By comparing experiments and theoretical calculations we can conclude that the charge transfer resistance through differently oxidized interfaces is at the origin of this structure-activity relationship.

This work was carried out in a collaboration between the groups of Prof. Matthias Arenz and Prof. Ulrich Aschauer.

References:

  • F. Bizzotto, H. Ouhbi, Y. Fu, G. Wiberg, U. Aschauer, M. Arenz;
    "Examining the Structure Sensitivity of the Oxygen Evolution Reaction on Pt Single-Crystal Electrodes: A Combined Experimental and Theoretical Study"
    ChemPhysChem, 2019, in press; doi:10.1002/cphc.201900193.