1403/01/09
شهرام قاسمی میر

شهرام قاسمی میر

مرتبه علمی: دانشیار
ارکید:
تحصیلات: دکترای تخصصی
اسکاپوس:
دانشکده: دانشکده شیمی
نشانی:
تلفن: 01135302388

مشخصات پژوهش

عنوان
Synthesis of Pt-Cu/poly (o-Anisidine) nanocomposite onto carbon paste electrode and its application for methanol oxidation
نوع پژوهش
JournalPaper
کلیدواژه‌ها
Carbon paste electrode; Electrochemical pretreatment; Poly (o-Anisidine); Bimetallic Pt/Cu nanoparticles; Redox replacement; Methanol oxidation
سال
2015
مجله INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
شناسه DOI
پژوهشگران Sayed Reza Hosseini-zavvarmahalleh ، Jahan Bakhsh Raoof ، Shahram Ghasemi ، Zahra Gholami

چکیده

In this work, for the first time, a novel and facile method for preparation of highly porous poly (o-Anisidine) (POA) by two-step process, through electropolymerization after electrochemical pretreatment of carbon paste electrode (CPE) is reported. Electrochemical response of the prepared POA at the surface of electrochemically pretreated CPE (pCPE) is, at least, 12 times higher than that obtained at the CPE. Copper (Cu) nanoparticles are uniformly electrodeposited onto the POA/pCPE composite. Then, platinum (Pt) nanoparticles are prepared through spontaneous and irreversible reaction via galvanic replacement between [PtCl6]2- ions and the Cu nanoparticles. The prepared bimetallic Pt/Cu nanoparticles are characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy and electrochemical methods. Electrochemical impedance spectroscopy shows that on the pCPE, charge transfer resistance is much smaller than that the CPE. The SEM images reveal that the electrochemical pretreatment of the CPE strongly influences morphology of the polymer film. The methanol oxidation and stability of the Pt-Cu/POA/pCPE are investigated by various electrochemical techniques. The results indicate that the modified electrode exhibits excellent electrocatalytic activity towards methanol oxidation.