Titanium Doping Induced Anisotropic Geometric and Electronic Modifications Improve Acidic Oxygen Evolution Reaction on RuO₂(110) Surface.

ABSTRACT: Metal doping has garnered attention as a strategy to enhance the oxygen evolution reaction (OER) activity and stability of Ru-oxides. However, the relationship between the surface structure and OER performance remains poorly understood. In this study, we prepared Ti-doped RuO₂(110) thin films using arc plasma deposition and investigated how Ti doping affects the near-surface structure and OER properties in an acidic environment. Up to 5 at% doped Ti was uniformly incorporated into the films without disrupting the 2-fold symmetry of the (110) surface. However, TiO₂ segregated near the outermost surface at higher doping levels, reducing surface symmetry. Ti doping improved the OER activity and Tafel slope across all doping concentrations, whereas the charge-normalized a

SUBMITTER: Naraki N 

PROVIDER: S-EPMC12723647 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature