شیمى کاربردى روز

شیمى کاربردى روز

تهیه نانوکامپوزیت ملامین نیکل مس به عنوان یک بستر کاتالیزوری امیدوارکننده برای الکترواکسایش متانول

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
گروه شیمی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران
چکیده
ملامین به دلیل داشتن گروه‌های حاوی N فراوان، ترکیبی مناسب برای ساختارهای غنی الکترون می باشد و لذا کامپوزیت نیکل و مس با ملامین، ساختاری غنی از الکترون و باعث افزایش فعالیت الکتروکاتالیستی و انتقال بار می شود. در این مطالعه، یک کامپوزیت ملامین نیکل مس از طریق فرآیند هیدروترمال تهیه و فعالیت کاتالیزوری آن روی سطح الکترود کربن شیشه ای اصلاح شده با نانولوله های کربنی (GCE/MWNT/MelCuNi) نسبت به واکنش اکسایش متانول (MOR) در محیط قلیایی مورد بررسی قرار گرفت. پایداری کاتالیزور سنتزی توسط تکنیک کرونوآمپرومتری (CA) بررسی شد. مورفولوژی سطح الکترود اصلاح شده با میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM) مشخص شد و ساختار کاتالیزور با بررسی الگوهای پراش اشعه ایکس (XRD) تعیین شد. نانو کامپوزیت MelCuNi حاصل، چگالی جریان بالاتر (92 mA.Cm-2) و پایداری قابل ملاحظه بهتری جهت اکسایش الکتروکاتالیزوری متانول دارد. اثر نانوذرات نیکل و مس بر عملکرد الکتروکاتالیزوری نانوکامپوزیت سنتز شده در حضور و عدم حضور ملامین نسبت به MOR نیز مورد بررسی قرار گرفت.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Preparation of melamine-Ni-Cu nanocomposite as a promising catalytic substrate for methanol electrooxidation

نویسندگان English

Mohammad Ali Kamyabi
Javad Azizi
Electroanalytical Chemistry Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Postal Code 45371-38791, Zanjan, Iran
چکیده English

Melamine is a nitrogen-rich compound. Its composite with transition metals has an electron-rich structure and increases electrocatalytic activity and charge transfer. In this study, a copper-nickel melamine nanocomposite was prepared through a hydrothermal process and its electrocatalytic activity was investigated on the surface of a glassy carbon electrode modified with multi-walled carbon nanotubes (GC/MWNT/MelCuNi) towards the oxidation reaction of methanol. (MOR). The stability of the synthesized catalyst was investigated by chronoamperometry (CA) technique. The surface morphology of the modified electrode was characterized by field emission scanning electron microscopy (FESEM) and the structure of the catalyst was determined by X-ray diffraction (XRD) patterns. The resulting MelCuNi nanocomposite has a higher current density (92 mA. Cm-2) and significantly better stability for the electrocatalytic oxidation of methanol. The effect of nickel and copper nanoparticles on the electrocatalytic performance of the synthesized nanocomposite in the presence and absence of melamine compared to MOR was also investigated.

کلیدواژه‌ها English

nanocomposite MelCuNi
methanol oxidation
hydrothermal
catalyst
direct methanol fuel cell
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