Potential dependent surface relaxation of the Pt(001)/electrolyte interface

Journal Article · Mon Sep 06 00:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.1601· OSTI ID:6222881

Tidswell, I M; Markovic, N M; Ross, P N ^[1]

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1. Materials Sciences Division, Lawrence Berkeley Laboratory, One Cyclotron Road, Berkeley, California 94720 (United States)

X-ray reflectivity measurements were used to determine the structure of the Pt(001)/solution interface as a function of the applied potential in alkaline and acid electrolytes. Unlike the Pt(001)/vacuum interface, the electrolyte interface was found to be unreconstructed at all potentials. The lattice spacing between the first and second layer was found to be a funciton of potential in the region where approximately a monolayer of H was adsorbed. The expansion was up to 2.5% of a lattice spacing (0.05 A) in alkaline electrolyte, and up to 1% of a lattice spacing in acid electrolytes.

• DOE Contract Number: AC03-76SF00098; AC02-76CH00016
• OSTI ID: 6222881
• Journal Information: Physical Review Letters; (United States), Vol. 71:10; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PLATINUM
SURFACE PROPERTIES
CRYSTAL STRUCTURE
ELECTRIC POTENTIAL
ELECTROLYTES
EXPANSION
INTERFACES
REFLECTIVITY
RELAXATION
X-RAY SPECTROSCOPY
ELEMENTS
METALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLATINUM METALS
SPECTROSCOPY
TRANSITION ELEMENTS
360102* - Metals & Alloys- Structure & Phase Studies
400400 - Electrochemistry