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

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)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1982
Accession Number
ADA119192

Entities

People

  • Arthur S. Homa
  • B. D. Cahan
  • E. Yeager

Organizations

  • Case Western Reserve University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Adsorption
  • Chemical Engineering
  • Chemistry
  • Crystals
  • Electrochemical Cells
  • Electrodes
  • Engineering
  • Geography
  • Hydrogen
  • Impurities
  • Materials
  • Materials Science
  • Measurement
  • Military Research
  • New York
  • Platinum
  • Single Crystals

Readers

  • Electrochemical Surface Science
  • Systems Analysis and Design
  • Thin Film Deposition Science.