TY - JOUR
T1 - Stern layers on RuO2 (100) and (110) in electrolyte
T2 - Surface X-ray scattering studies
AU - Kawaguchi, Tomoya
AU - Rao, Reshma R.
AU - Lunger, Jaclyn R.
AU - Liu, Yihua
AU - Walko, Donald
AU - Karapetrova, Evguenia A.
AU - Komanicky, Vladimir
AU - Shao-Horn, Yang
AU - You, Hoydoo
N1 - Funding Information:
The X-ray and electrochemistry work and data analysis were supported by the U.S. Department of Energy (DOE), Office of Basic Energy Science (BES), Materials Sciences and Engineering Division and use of the APS was supported by DOE BES Scientific User Facilities Division , under Contract No. DE-AC02-06CH11357 . The work (VK) at Safarik University has been supported by grant VEGA No. 1/0204/18 , the grant of the Slovak Research and Development Agency under the contract No. APVV-17-0059 . The work at MIT (RR JL YS) was supported in part by the Skoltech-MIT Center for Electrochemical Energy and the Cooperative Agreement between the Masdar Institute, Abu Dhabi, UAE and the MIT, Cambridge, MA, USA (02/MI/MIT/CP/11/07633/GEN/G/00). One of the authors (TK) thanks the Japanese Society for the Promotion of Science (JSPS) for JSPS Postdoctoral Fellowships for Research Abroad.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/10/15
Y1 - 2020/10/15
N2 - Electrochemical Stern layers are observed on the surfaces of RuO2 single crystals in 0.1 M CsF electrolyte. The Stern layers formed at the interfaces of RuO2 (110) and (100) 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 reactions are similar, the hydration layers intervening the surface and the Cs+ layer are significantly denser on RuO2 surfaces than that on Pt(111) surface, reflecting the oxygen termination of RuO2 surfaces. The overall similarities between Stern layers on ruthenium surfaces and platinum surface suggest the universal presence of Stern layers in all well-defined solid-electrolyte interfaces.
AB - Electrochemical Stern layers are observed on the surfaces of RuO2 single crystals in 0.1 M CsF electrolyte. The Stern layers formed at the interfaces of RuO2 (110) and (100) 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 reactions are similar, the hydration layers intervening the surface and the Cs+ layer are significantly denser on RuO2 surfaces than that on Pt(111) surface, reflecting the oxygen termination of RuO2 surfaces. The overall similarities between Stern layers on ruthenium surfaces and platinum surface suggest the universal presence of Stern layers in all well-defined solid-electrolyte interfaces.
KW - Electrochemical double layer
KW - Oxygen evolution reaction
KW - Pt(111)
KW - RuO
KW - Stern layer
KW - Surface X-ray scattering
KW - Surface electrochemistry
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U2 - 10.1016/j.jelechem.2020.114228
DO - 10.1016/j.jelechem.2020.114228
M3 - Article
AN - SCOPUS:85085289121
SN - 1572-6657
VL - 875
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
M1 - 114228
ER -