کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803215 | 1516463 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical and structural components of work function changes in the process of palladium hydride formation within thin Pd film
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Surface phenomena which occur in the process of palladium hydride PdHx formation during H2 interaction “in situ” with thin palladium films were studied by means of two methods: (i) measurements of work function changes ÎΦ, and (ii) determination of topographical images using atomic force microscopy (AFM). A very strong decrease of the work function up to â¼ 2âV was registered in the course of the reaction at 78âK when thin Pd films deposited on Pyrex glass were applied. However a small ÎΦ was noticed when using Pd films deposited on glass precovered with a thick platinum film. AFM topography exhibited a net of distinct protrusions in the first case, but the topography was almost unchanged in the second. We suggest that the above unusually high decrease of the work function in the process of PdHx formation within a Pd/glass system is caused by the change of thin Pd film topography, and not by very strong polarization of hydrogen adspecies on PdHx surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volumes 404â406, 8 December 2005, Pages 284-287
Journal: Journal of Alloys and Compounds - Volumes 404â406, 8 December 2005, Pages 284-287
نویسندگان
R. DuÅ, R. Nowakowski, E. Nowicka,