Synthesis and characterization of some gold-based nano electrocatalysts for use in isomeric alcoholic fuel cells
Başlık çevirisi mevcut değil.
- Tez No: 912466
- Danışmanlar: DR. ESMAEİL HABİBİ
- Tez Türü: Yüksek Lisans
- Konular: Belirtilmemiş.
- Anahtar Kelimeler: Alcoholic Fuel cell, Oxide Nanostructures, Gold, Isomeric Alcohol, Electrooxidation
- Yıl: 2019
- Dil: Arapça
- Üniversite: Urmia University
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 90
Özet
Current estimations about energy resources with high production rate have been extensively confirmed their depletion in recent years. Fuel cell is an apparatus that changes chemical energy obtained from fuel and oxidant into electricity on the surface of a suitable electro catalysts. Special attention has been paid to the development of alcohol fuel cells in recent decades. Methanol with a low cost, convenient manipulation, and relatively high energy density has been considered as an appropriate fuel for direct alcohol fuel cells (DAFC), but these class of fuel cells possess such problems as toxicity, low activity and efficiency, and having precious platinum catalyst. The aforementioned problems have limited the application of direct alcohol fuel cells and researchers have been stimulated to utilize the other alcohols such as ethanol and 2-propanol in fuel cells, which don't have the drawbacks of primary alcohols. This study is aimed to prepare anodic electro catalysts based on gold nanoparticles and investigate the improving effect of other metal oxide nano stuctures e.g. Cobalt oxide, Manganese oxide, Tungsten oxide on increasing the electro catalytic activity of gold nanostructures toward oxidation of isomeric alcohol, 2-butanol. It should be noticed that the comparison investigations about electrochemical performance of these nanostructures have been outstretched using cyclic voltametry (CV), chronoamperometry, electrochemical impedance spectroscopy, and chrono potentiometry. All of the conditions involved in oxidation reaction such as temperature, scan rate, and the amount oxidant have also been optimized during electro oxidation process. In order to characterize the prepared electro catalysts in the terms of their structure and morphologies, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were utilized in present study. Eventually, it can be concluded that the employed nano electro catalysts have a superior stability and activity toward oxidation of 2-butanol and they can be utilized as anode in isomeric alcohol fuel cells.
Özet (Çeviri)
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