کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
220010 463311 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Studies of the electrodeposition of platinum metal from a hexachloroplatinic acid bath
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Studies of the electrodeposition of platinum metal from a hexachloroplatinic acid bath
چکیده انگلیسی

The mechanism of platinum deposition onto carbon from a bath containing H2PtCl6 in 0.1 M HCl is discussed. Although voltammograms show multiple cathodic waves, it is shown that they all result from the reduction of Pt(IV) to Pt(0) and there is no evidence for Pt(II) as a stable intermediate at any potential; the multiple waves arise because the hexachloroplatinic acid exists in solution as a mixture of kinetically inert Cl−/H2O complexes. The nucleation of the Pt centres on carbon is a very slow process even with a large overpotential and this leads to surfaces with well dispersed hemispherical nuclei. Moreover, each Pt centre appears to grow only to a limiting size before growth ceases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 633, Issue 2, 15 August 2009, Pages 327–332
نویسندگان
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