Commensurate Water Monolayer at the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>RuO</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mo>(</mo><mn>110</mn><mo>)</mo></math></span>/Water Interface

Y. S. Chu; T. E. Lister; W. G. Cullen; H. You; Z. Nagy

doi:10.1103/PhysRevLett.86.3364

Commensurate Water Monolayer at the ${RuO}_{2} (110)$ /Water Interface

Y. S. Chu, T. E. Lister, W. G. Cullen, H. You, and Z. Nagy

Phys. Rev. Lett. 86, 3364 – Published 9 April 2001

Abstract

We demonstrate the presence of two types of commensurate, registered water monolayers with different densities at the ${RuO}_{2} (110) / bulk - water$ (0.1 M NaOH solution) interface with off-specular, oxygen crystal truncation rods. At anodic potentials (close to oxygen evolution), the extraneous water layer and the surface hydroxide layer form a bilayer with O—H—O bond distances similar to that of ice X. At cathodic potentials, the water molecules converted from the bridging OH molecules form a low-density water layer.

Received 2 June 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.3364

Authors & Affiliations

Y. S. Chu^1,2, T. E. Lister^1,*, W. G. Cullen¹, H. You¹, and Z. Nagy¹

¹Argonne National Laboratory, Materials Science Division, Argonne, Illinois 60439
²Argonne National Laboratory, Experimental Facility Division, Argonne, Illinois 60439