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Preparation And Characterization Of Palladium Nanoparticles Loaded Polyaniline With Magnetic Property As A Catalyst For Hydrogen Generation

Diğer Başlık: Hidrojen Üretimi İçin Katalizör Olarak Paladyum Nanoparçacık Yüklenmiş Manyetik Özelliğe Sahip Polianilin Hazırlanması ve Karakterizasyonu

Oluşturulma Tarihi: 08-12-2020

Niteleme Bilgileri

Tür: Tez

Alt Tür: Yüksek Lisans Tezi

Yayınlanma Durumu: Yayınlanmamış

Dosya Biçimi: PDF

Dil: İngilizce

Konu(lar): Kimya,

Yazar(lar): Alsada, Ahmed Saleh Abdullah (Yazar),

Emeği Geçen(ler): Kaya, Murat (Tez Danışmanı), Akpınar, Yeliz (Tez Danışmanı),


Yayın Tarihi: 04-08-2020


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Anahtar Kelimeler

Hydrogen Energy, Ammonia Borane, Polymer Support, Palladium Nanoparticle, Nanocatalyst.


Özet

Catalysis is a crucial area today because of its importance, as 90% of chemical processes contain catalysis in at least one step in their interactions, as it addresses many environmental issues as well as issues related to sustainability. Metal nanoparticles have attracted the attention of many researchers because of their effectiveness as a catalyst because they represent a new type of catalyst through the properties it possesses. The metal nanoparticles are supported by materials such as silica and alumina to gain more good properties. Support materials such as polymeric materials have recently emerged as essential support materials in the catalyst field for their stability and ease of production. The search for clean and sustainable energy sources is still underway. Hydrogen is emerging as a source of clean energy and a possible alternative to fossil fuels soon, and many substances containing hydrogen have appeared in various proportions such as water, biomass, hydrocarbons, and chemical hydrides. Among these substances, ammonia borane is considered one of the most important of these substances that contain a high percentage of hydrogen (19.6 wt%) with high stability and low toxicity. In this thesis, palladium nanoparticles loaded polyaniline composite material (MNPPANI-PdNPs) with a magnetic property was prepared. For this initially, magnetic nanoparticles added PANI was prepared with oxidative polymerization. After that palladium nanoparticles were loaded to the composite material by using a wet impregnation method followed with sodium borohydride reduction. The catalytic activity of the resulting particles was tested in the dehydrogenation of Ammonia borane under ambient temperature. Also, components and resulting material were characterized by using SEM, TEM, EDX, FTIR, and ICP-OES. After optimization studies, the highest TOF value was calculated as 220 min-1 for the 20 mg 1.2 % Pd (w/w) loaded catalyst. Because of the magnetic property of the catalyst, it is quickly separated from the reaction mixture using an external magnet without the need to use other methods such as filtration or centrifugation. The catalyst was reused for five consecutive reactions, the results showing that 95% of the initial activity was retained with a full hydrogen release at the end of the fifth catalyst operation.



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