J. K. Wang, N. S. Marinković
This study investigates the electrochemical surface oxidation of Ru(0001) in acid solutions, focusing on a one-electron process that leads to monolayer oxygen uptake at potentials below 1.35 V. A detailed analysis was conducted in 1 M H2SO4, revealing the co-adsorption of approximately one-third monolayer of bisulfate anions with hydronium cations at lower potentials. We observed that the spacing between the top two Ru layers measured 2.13 Å at 0.1 V and 2.20 Å at 1.0 V, closely aligning with the gas phase values for bare Ru and monolayer oxygen on Ru. Notably, the study found that unlike Pt(111) and Au(111), Ru(0001) oxidation does not involve place exchange. On the oxidized surface, oxygen species maintain a position on the smooth Ru surface, leading to partial desorption of bisulfate ions. Furthermore, the study postulates that the absence of subsurface oxygen in Ru(0001) results in its relative inactivity toward CO oxidation, a key aspect in catalyst development for fuel cells and related electrochemical applications.
@article{371fce33-bcb5-44dd-8ce5-bcb5e4dc665e,
title={In Situ X Ray Reflectivity and Voltammet},
author={J. K. Wang and N. S. Marinković},
year={2026},
language={en}
}TY - JOUR TI - In Situ X Ray Reflectivity and Voltammet AU - J. K. Wang AU - N. S. Marinković PY - 2026 LA - en ER -
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