1403/01/10

رضا اوجانی

مرتبه علمی: استاد
ارکید:
تحصیلات: دکترای تخصصی
اسکاپوس:
دانشکده: دانشکده شیمی
نشانی:
تلفن: 011 35302350

مشخصات پژوهش

عنوان
A simple route for electrochemical preparation of Cu/Pt nanoparticles supported on glassy carbon electrode based on p-isopropyl calix[6]arene matrix and its activity for electrochemical oxidation of H2O2ظ
نوع پژوهش
JournalPaper
کلیدواژه‌ها
Platinum nanoparticles; P-isopropyl calix[6]arene; Hydrogen peroxide; Electrochemical oxidation; Galvanic replacement
سال
2015
مجله Journal of the Iranian Chemical Society
شناسه DOI
پژوهشگران Ehteram Hasheminejad ، Jahan Bakhsh Raoof ، Reza Ojani ، Sahar Rashid‑Nadimi

چکیده

In this article, the Cu nanoparticles were prepared on the p-isopropyl calix[6]arene-modified glassy carbon electrode by preconcentration of copper ions in open circuit potential and consecutive electrochemical reduction of them. P-isopropyl calix[6]arene was used as a template for synthesis of the Cu nanoparticles due to the ability of its cavities to trap the copper ions. Bimetallic Cu/Pt nanoparticles were also obtained by galvanic replacement of metallic Cu with Pt by simply immersing the electrode surface in a PtCl4 aqueous solution. The surface morphology of the Cu and Cu/Pt fabricated nanoparticles was investigated using scanning electron microscopy (SEM). Then, the electrochemical characteristics were analyzed through the cyclic voltammetry and electrochemical impedance spectroscopy techniques. The morphology analysis of the deposits using SEM reveals that the sizes and distribution of the nanoparticles were tuned using calix[6]arene matrix. Cu/Pt-coated glassy carbon electrode exhibited a promising activity for electrochemical oxidation of hydrogen peroxide (H2O2). The proposed modified electrode showed two linear ranges for H2O2 detection, 0.05–1.00 mM and 1.00–13.00 mM, and a detection limit equal to 0.01 mM (S/N = 3).