Investigation of the Effect of Amine Functionalized Multiwall Carbon Nanotubes as promising support for Pt Nanoparticles on Oxygen Reduction Reaction
محل انتشار: کنفرانس بین المللی پژوهش در علوم و مهندسی
سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 628
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شناسه ملی سند علمی:
ICRSIE01_258
تاریخ نمایه سازی: 25 آذر 1395
چکیده مقاله:
In this study, multi-wall carbon nanotubes were chemically oxidized (OMWCNTs) and functionalized with ethylenediamine (EDAMWCNTs) as an amine precursor. The electrocatalysis were prepared through deposition of platinum nano particles on the functionalized carbon nanotubes by polyol method with the ratio of 10 wt% Pt. The formation of functional groups, the average size of Pt particles and the structural changes were characterized by FTIR, XRD and TEM. The average size of Pt nano particles was found to be between 4 and 5 nm. An appropriate dispersion of nanoparticles was observed especially in the presence of nitrogen atoms which can enhance the electro catalytic activity of the electro catalysis for oxygen reduction reaction. Cyclic voltammetry (CV) and rotating disk electrode (RDE) were employed to evaluate the electrochemical properties of the electro catalysis. Electrochemical active surface area (EAS), number of electron transferred (n), and onset potential were increased in the case of Pt-EDAMWCNTs which were found to be 32.2 (m2/g Pt), 0.987 (V vs RHE), and 4.03 electron per oxygen molecule, respectively. However, in the case of Pt-OMWCNTs the above mentioned electrochemical characteristics were calculated to be 27.8 (m2/g Pt), 0.824 (V vs RHE), and 3.34 electron, respectively. Thus, the reduction of oxygen molecules improves in the presence of amine functional groups owing to better nucleation and growth of Pt nano particles. The results indicate that, the presence of nitrogen atoms at amine functional groups improves the electro catalytic activity due to its high electron conductivity.
کلیدواژه ها:
نویسندگان
Amir Yadegari
Catalysis and Nanostructured Materials Research Laboratory, School of Chemical Engineering, University of Tehran, Tehran, Iran
Amideddin Nouralishahi
Energy, Environment and Nanostructure Materials, Caspian Faculty of Engineering, University of Tehran, Rezvanshahr, Iran
Alimorad Rashidi
Research Institute of Petroleum Industry (RIPI), Azadi sport complex West Blvd., Tehran, Iran
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