Electrocatalytic Activities of the Pt/CNP Nanocomposite on Carbon Ceramic Electrode for Ethanol Oxidation

سال انتشار: 1397
محل انتشار: بیستمین کنگره شیمی ایران
کد COI اختصاصی: IRANCC20_489
زبان مقاله: انگلیسی
تعداد مشاهده: 332

نویسندگان

Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran;

Hamideh Imanzadeh

Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran;

چکیده

Direct ethanol fuel cells (DEFCs) have high mass energy density and can be handled, transferred and stored easily [1, 2]. Compared with other fuels, ethanol is less permeable through polymeric membranes, less toxic, cheaper, and easier to store. So that, the study of electrooxidation of ethanol and the construction of a DEFC has increasing interest in the current decays [3]. It is well known that platinum (Pt) is an effective electrocatalyst for ethanol oxidation. However, problems such as CO poisoning on the Pt catalyst becomes an important issue by decreasing the number of active reaction site available and the breaking the carbon-carbon bond in larger alcohol molecules need to high energy. Therefore, it is necessary to use new type of electrocatalysts to improve the velocities of ethanol oxidation and new supports for electrocatalysts to reduce the amount and the cost. Carbon nanomaterials with several form and structure such as carbon nanotubes (MWCNT and SWCNT) [4], nanostructured carbon black [5] and etc. have been used as support for metal nanoparticles electrocatalysts and can improve their electrocatalytic performance.In this work, the Pt nanoparticles (PtNPs) and Pt nanoparticles doped on/in the carbon nanoparticles (PtNPs/CNPs) on carbon-ceramic electrode as a homemade substrate were used as electrocatalysts for the oxidation of the ethanol .The morphology, structure, composition and electrochemical behavior of the PtNPs and PtNPs/CNPs modified carbon-ceramic electrodes were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and cyclic voltammetric methods. It was found that PtNPs/CNPs modified carbon-ceramic electrode was electrocatalytically more active than Pt-alone nanoparticles modified carbon-ceramic electrode and had satisfactory stability.

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