Changes Induced in the Surface Characteristics and Catalytic Activity of Amorphous Cu--Zr by Hydrogen Pretreatment

Hydrogen-treated amorphous Cu sub 61 Zr sub 39 alloy ribbon exhibits the development of characteristic formations (hemispheres) in a circular arrangement (as revealed by SEM) on both sides of the ribbon, in parallel with Cu enrichment (determined by AES) and partial crystallization (determined by di...

Full description

Saved in:
Bibliographic Details
Published in:Surface and interface analysis 1991-10, Vol.19 (1-12), p.519-523
Main Authors: Katona, T, Molnar, A, Perczel, I V, Kopasz, C S, Hegedus, Z
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hydrogen-treated amorphous Cu sub 61 Zr sub 39 alloy ribbon exhibits the development of characteristic formations (hemispheres) in a circular arrangement (as revealed by SEM) on both sides of the ribbon, in parallel with Cu enrichment (determined by AES) and partial crystallization (determined by differential scanning calorimetry). The extrusion of pure Cu is considered to be caused by H diffusing into the bulk through existing surface defects. As a consequence of the surface and structural changes, steady increases in both the Cu surface area and the catalytic activity (dehydrogenation of alcohols and isomerization of allyl alcohol adn 2-propyloxirane) are demonstrated.
ISSN:0142-2421