Preparation of thin film Cu–Pt(111) near-surface alloys: One small step towards up-scaling model single crystal surfaces

A method for the preparation of Pt(111) like thin films and thin film Cu–Pt(111) near-surface alloys (where Cu is preferentially located in the subsurface region) is reported in detail. Cyclic voltammograms of the resultant Pt(111)-like thin films in 0.1M HClO4 demonstrate characteristic “butterfly”...

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Bibliographic Details
Published in:Electrochimica acta 2013-12, Vol.112, p.887-893
Main Authors: Henry, John B., Maljusch, Artjom, Tymoczko, Jakub, Schuhmann, Wolfgang, Bandarenka, Aliaksandr S.
Format: Article
Language:English
Subjects:
Alloys
ANNEALING PROCESSES
Copper
COPPER ALLOYS (40 TO 99.3 CU)
Copper base alloys
Crystals
Cu–Pt alloys
Disorders
Near-surface alloys
Platinum base alloys
Single crystals
THIN FILMS
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Summary:A method for the preparation of Pt(111) like thin films and thin film Cu–Pt(111) near-surface alloys (where Cu is preferentially located in the subsurface region) is reported in detail. Cyclic voltammograms of the resultant Pt(111)-like thin films in 0.1M HClO4 demonstrate characteristic “butterfly” peaks attributed to the disorder/order phase transition in the adsorbed *OH layer, typical for a large Pt(111) crystals. Modification of the film surface with a monolayer of Cu and subsequent annealing in a reducing Ar/H2(5%) atmosphere, the voltammograms resemble those obtained for Cu–Pt(111) near-surface alloys prepared on commercial bulk single crystals. This method shows promise for the fabrication of extended (111)-type alloy surfaces of Pt and its alloys and can additionally be used to up-scale model objects for wider industrial and laboratory applications.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2012.11.139