سنتز نانوچندسازه نیکل- مس به‌عنوان یک ماده آندی کارآمد در ‏پیل سوختی الکلی به¬کمک تابش ریزموج برای اکسایش ‏الکتروکاتالیستی متانول ‏

محورهای موضوعی : شیمی کاربردی

محمد علی کامیابی ^{1 *} , بابک جلیلیان ²

1 - استاد تمام گروه شیمی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران.‏
2 - دانشجوی کارشناس ارشد گروه شیمی، دانشکده علوم، دانشگاه زنجان، زنجان، ‏ایران.‏

تاریخ دریافت : 1402/05/24 تاریخ پذیرش : 1402/12/24 تاریخ انتشار : 1403/12/15

کلید واژه: پیل سوختی, تابش ریزموج, اکسایش الکتروکاتالیستی متانول, بسپار ‏رسانا, ملامین,

چکیده مقاله :

در این مطالعه، نانوچندسازه­های دو فلزی نیکل ­ـ مس و کاهش گرافن اکسید به­طور هم‌زمان با به‌کارگیری تابش ریزموج سنتز و کارایی کاتالیستی آن‌ها بررسی شد. روش سنتز پیشنهادی یک فرایند ساده، سریع و قابل‌واپایش بشمار می‌رود. رفتار الکتروشیمیایی کاتالیست سنتزشده برای واکنش اکسایش متانول (MOR) در محیط قلیایی بررسی شد. اثر ملامین بر فعالیت الکتروکاتالیستی نمونه سنتزشده با روش‌های آمپرولت‌سنجی چرخه‌ای (CV)، زمان-آمپرسنجی (CA) و طیف‌سنجی رهبندی الکتروشیمیایی (EIS) مطالعه شد. استفاده از ملامین به‌عنوان منبع نیتروژن برای دوپه‌شدن نیتروژن در شبکه گرافن اکسید کاهش‌یافته تا حدی منجر به تشکیل ساختارهای NiCu-N ‌شد. این پیوند فلز-نیتروژن موجب افزایش فعالیت کاتالیستی نسبت به MOR شد. اثر ملامین با افزایش 203 میکروآمپری در جریان و کاهش 20 میلی­ولتی در پتانسیل شروع در مقایسه با سایر کاتالیست‌های شاهد سنتزشده در طی فعالیت MOR، تایید شد. نتیجه­ها نشان‌دهنده کارایی عالی کاتالیست سنتزشده به­عنوان آند در پیل‌ سوختی مستقیم متانول بود.

چکیده انگلیسی:

: In this study, the synthesis and application of bimetallic nickel-copper nanocomposites and reduction of graphene oxide simultaneously using microwaves were performed. The proposed synthesis method is a simple, fast and controllable process. The electrochemical behavior of the synthesized catalyst was investigated for methanol oxidation reaction (MOR) in alkaline medium. The effect of melamine on the electrocatalytic activity of the synthesized catalyst was studied by cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) methods. Also, investigating the effect of melamine as a source of nitrogen leading to nitrogen doping in the reduced graphene oxide network showed that it partially had led to the formation of NiCu-N structures. The metal-nitrogen bond increased the catalytic activity towards MOR. The promoting effect of melamine was proved by an increase of 203 μA in the current and a decrease of 20 mV in the onset potential compared to other synthesized control catalysts during MOR activity. The results indicated the excellent performance of the synthesized catalyst as an anode in a direct methanol fuel cell.

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