کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
197352 459882 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A voltammetric and nanogravimetric study of Te underpotential deposition on Pt in perchloric acid medium
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
A voltammetric and nanogravimetric study of Te underpotential deposition on Pt in perchloric acid medium
چکیده انگلیسی

This work describes the study of Te underpotential deposition on Pt in acid media using cyclic voltammetry, rotating ring-disc electrode and electrochemical quartz crystal microbalance techniques. The voltammetric results indicate the presence of two dissolution peaks in the positive scan with a total charge density of 420 μC cm−2. These phenomena are attributed to the deposition of one Te monolayer with the occupancy of two active Pt sites by each ad-atom. This is confirmed by rotating ring-disc electrode results. The electrochemical quartz crystal microbalance (EQCM) experiments yielded the small mass variation of −32 ng cm−2 (while the theoretical one is −140.4 ng cm−2 for a complete Te monolayer). This low value can be attributed to the simultaneous adsorption of water, perchlorate anions and the formation of platinum oxide.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 50, Issue 11, 1 April 2005, Pages 2289–2295
نویسندگان
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