Accession Number : ADA119192

Title :   LEED-AES-Thin Layer Electrochemical Studies of Hydrogen Adsorption on Platinum Single Crystals.

Descriptive Note : Technical rept.,


Personal Author(s) : Homa,Arthur S ; Yeager,E ; Cahan,B D

PDF Url : ADA119192

Report Date : 01 Aug 1982

Pagination or Media Count : 25

Abstract : The understanding of the relation of electrocatalysis to electrode surface structure requires measurements on electrode surfaces free of impurities and of well defined morphology. A system has been developed which allows preparation and characterization of such surfaces in an ultrahigh vacuum using LEED and AES, their electrochemical examination within a thin-layer cell, and subsequent re-examination of the surface morphology and purity. The electro-chemical adsorption-desorption of hydrogen has been studied on the three low index planes of Pt in dilute HF. When the potential range is restricted to 0.05-0.5 V vs RHE (1 atm), post-electro-chemical LEED analysis shows that the Pt(111) and (110)-(1x2) surfaces retain their original structure while the Pt (100)-(5x20) loses its 5x20 overlayer. (Author)

Descriptors :   *Electrochemistry, *Single crystals, *Absorption, *Hydrogen, Catalysis, Electrodes, Surfaces, Platinum, Electrolytic cells, Thinness, Desorption, Ultrahigh vacuum, Purity

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE