کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
218119 463183 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A low cost and highly active non-noble alloy electrocatalyst for hydrazine oxidation based on nickel ternary alloy at the surface of graphite electrode
ترجمه فارسی عنوان
الکتریک کاتالیزور آلاینده ارزان قیمت و بسیار فعال غیر آهنی برای اکسیداسیون هیدرازین بر پایه آلیاژ سه تایی نیکل در سطح الکترو گرافیت
کلمات کلیدی
هیدرازین، اکسیداسیون الکتریکی کاتالیزوری، نیکل، الکترود اصلاح شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Preparation of a low cost and highly active alloy electrocatalysts based on nickel ternary alloy at the surface of graphite electrode.
• Study the electro-oxidation of hydrazine by electrochemical methods.
• Comparing electrochemical oxidation of hydrazine on pure metals and ternary alloy
• Investigating the electrocatalytic mechanism of the modified electrode

The electrocatalytic oxidation of hydrazine was studied over Ni, Cu, Co and Ni-based ternary alloy on graphite electrodes in alkaline solution. The catalysts were prepared by cycling the graphite electrode in solutions containing Ni, Cu and Co ions at cathodic potentials. The synergistic effects and the catalytic activity of the modified electrodes were investigated by cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS). It was found that, in the presence of hydrazine, the modified Ni-based ternary alloy electrode (G/NiCuCo) exhibited a good catalytic activity for the oxidation of hydrazine at a reduced overpotential and it has a significant high response for hydrazine oxidation. During CA regime the reaction follows a Cottrellin behavior and the diffusion coefficient of hydrazine is found to be 6.28 × 10− 6 cm2 s− 1. EIS studies were used to investigate the catalytic oxidation of hydrazine on the surface of the modified electrode.

Stable electroactive modified electrodes with Ni based ternary alloy at graphite rod (G/NiCuCo) were prepared by cyclic voltammetry. It was found that the G/NiCuCo exhibited good catalytic activity for the oxidation of hydrazine at a reduced overpotential and it has a significant high response for hydrazine oxidation.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 763, 15 February 2016, Pages 134–140
نویسندگان
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