Structure of halide and metal adlayers in the course of electrocatalytic reactions: Oxygen reduction and hydrogen evolution

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:538970

Wang, J X; Adzic, R R ^[1]

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1. Brookhaven National Lab., Upton, NY (United States)

The atomic structure of reaction sites is of exceptional importance for the areas of catalysis and electrocatalysis. A determination of the structure of these sites during the course of reactions has been the goal of scientists in these areas for long time. This can be achieved by in situ application of surface X-ray scattering techniques. The measurements were carried out with TI adlayers on Au(111), Au(100), Ag(100) and Pt(111); Bi on Au(100) and Au(110); Ag on Pt(111); I on Au(111), Au(110); Br on Au(100), Ag(110) and Pt(111). In general, the lattice structures of metal adlayers (submonolayers, monolayers or bilayers) are not stable during oxygen reduction when 100% O{sub 2} is fed to the surface. Halide monolayers are stable on Au but not on Ag and Pt. Both metal and halide adlayers maintain their lattice structures during hydrogen evolution at low rates.

• OSTI ID: 538970
• Report Number(s): CONF-960807--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH
BROMINE
CATALYSTS
CRYSTAL STRUCTURE
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PLATINUM
SILVER
THALLIUM