Electrochemical hydration and reaction processes on metal surfaces studied by gas phase adsorption

✍ Scribed by J.K. Sass; D. Lackey; J. Schott

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 483 KB
• Volume: 36
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(91)85062-c

✦ Synopsis

A&met-The distinction between surface hydration and reaction processes in ultrahigh vacuum studies of electrochemical phenomena is illustrated by coadsorption of H,O with: (i) Cs on Cu(ll0); at low caesium coverages, solvation of the adsorbed alkali is observed and above a critical coverage of 6, = 0.15 a surface reaction occurs forming hydroxide and hydrogen. Work function measurements have also been used to characterize the dielectric screening by interfacial water; (ii) hydrogen on Cu(ll0) and Pt( 111):

'IDS and HREELS measurements using isotopic substitution of hydrogen by deuterium have been used to investigate the formation of (l&O+),,,. whereas on Cu(ll0) hydrogen is merely solvated by water, on Pt( 111) there is evidence for the production of hydrated protons.