کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10638224 | 995413 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of palladium metal particle deposition on the conductive diamond surface by XRD, XPS and electrochemistry
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The spontaneous deposition of Pd metal particles on a conductive boron-doped diamond film supported on silicon substrate was achieved by immersing the diamond/silicon in solutions of 100 ppm Pd2+ with various HF concentrations (0.0049-4.9%). Scanning electron microscopy showed that HF strength affects the deposition morphology (size and density) of Pd particles on polycrystalline diamond surfaces. X-ray photoelectron spectroscopy confirmed the zero valence of Pd particles. X-ray diffraction characterization of Pd particles prepared from 0.0049% HF showed significant lattice strain (|É| â¥Â 1.4%) compared to those from [HF] â¥Â 0.049%. The unstrained Pd showed similar electrocatalytic behavior as a Pd disk. While a tensile strain along ã1 1 1ã and the consequent increase in the Pd interatomic spacing (to â¼2.79 Ã
) could explain the enhanced hydrogen evolution electrocatalytic behavior of Pd metal particles prepared from 0.0049%, the same strained Pd on diamond exhibit no electrocatalytic activity toward HCHO oxidation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 92, Issue 1, 15 July 2005, Pages 152-158
Journal: Materials Chemistry and Physics - Volume 92, Issue 1, 15 July 2005, Pages 152-158
نویسندگان
Tiruchirapalli Arunagiri, Teresa D. Golden, Oliver Chyan,