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arXiv · 2002.11521

Stern Layers on Surfaces of RuO2(100), RuO2(110), and Pt(111): Surface X-ray Scattering Studies

Tomoya Kawaguchi·Reshma R. Rao·Jaclyn R. Lunger·Yihua Liu·Donald A. Walko·Evguenia A. Karapetrova·Vladimir Komanicky·Yang Shao-Horn·Hoydoo You
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Abstract

Surface X-ray scattering studies of electrochemical Stern layer are reported. The Stern layers formed at the interfaces of RuO2 (110) and (100) in 0.1 M CsF electrolyte are compared to the previously reported Stern layer on Pt(111) [Liu et al., J. Phys. Chem. Lett., 9 (2018) 1265]. While the Cs+ density profiles at the potentials close to hydrogen evolution reaction are similar, the hydration layers intervening the surface and the Cs+ layer on RuO2 surfaces are significantly denser than the hydration layer on Pt(111) surface possibly due to the oxygen termination of RuO2 surfaces. We also discuss in-plane ordering in the Stern layer on Pt(111) surface.

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Tomoya Kawaguchi, Reshma R. Rao, Jaclyn R. Lunger, Yihua Liu, Donald A. Walko, Evguenia A. Karapetrova, Vladimir Komanicky, Yang Shao-Horn, Hoydoo You. 2020-02-25. Stern Layers on Surfaces of RuO2(100), RuO2(110), and Pt(111): Surface X-ray Scattering Studies. https://arxiv.org/abs/2002.11521

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