Surface composition of Pt-Pd alloys treated in hydrogen

Pd enrichment is observed in Pd-Pt alloy sheets when heated in He and in H 2. The surface composition was monitored by soft X-ray emission spectroscopy (SXES) and by work function measurements. A regular solution model is used to calculate the expected composition of the surface atomic layers, with...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Applied surface science 1989-11, Vol.40 (1), p.77-83
Hauptverfasser:	Szabo, A., Paál, Z., Szász, A., Kojnok, J., Fabian, D.J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Metals, semimetals and alloys Metals. Metallurgy Physics Solid surfaces and solid-solid interfaces Specific materials Surface structure and topography Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Pd enrichment is observed in Pd-Pt alloy sheets when heated in He and in H 2. The surface composition was monitored by soft X-ray emission spectroscopy (SXES) and by work function measurements. A regular solution model is used to calculate the expected composition of the surface atomic layers, with and without adsorbed hydrogen, and the calculated and measured values for Pd-enrichment are compared. The possible effect of subsurface adsorbed hydrogen is discussed.
ISSN:	0169-4332 1873-5584
DOI:	10.1016/0169-4332(89)90161-X