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Preparation And Characterization of Palladium Nanoparticles Added Polythiophene For Hydrogen Production From Ammonia Borane

Oluşturulma Tarihi: 18-07-2017

Niteleme Bilgileri

Tür: Tez

Alt Tür: Yüksek Lisans Tezi

Yayınlanma Durumu: Yayınlanmamış

Dosya Biçimi: PDF

Dil: İngilizce

Konu(lar): TEKNOLOJİ, Kimya mühendisliği,

Yazar(lar):

Emeği Geçen(ler): Aljarai, Sumaia Ahmed Muftah (Araştırma Sorumlusu), Kaya, Murat (Danışman),

Anahtar Kelimeler

polymer support, polythiophene, palladium nanoparticle, nanocatalyst,hydrogen production, ammonia borane


Özet

Nowadays, nanostructured catalysts gain great attention due to their high catalyticactivities in various types of reactions. For this reason more efforts have beendevoted to develop more efficient ways to produce catalysts with desired sizes. Toprepare an effective nanocatalyst, one of the main parameter is to prepare propersupport materials. It keeps the activity constant by preventing nanoparticles fromagglomeration and increases the reuse performance by giving easy isolationproperties. Among the support materials, polymers can be considered as goodcandidates due to their cheap and easy preparation ways and stabilites.Hydrogen energy is considered as one of the most promising green energy resources.Therefore, the design and production of proper catalysts, which can be used in theproduction of hydrogen from the storage materials is so important. Among the solidhydrogen storage materials like metal hydrides, chemical hydrides, organicmolecules, metal organic frameworks and carbon nanotubes, ammonia borane (AB)considered as one of the most effective hydrogen storage material. The hydrogencontent of AB is 19.6 wt % and it is nontoxic and stable under air and water.vWith the usage of suitable and effective catalyst, it is possible to take all hydrogenfrom AB at moderate conditions. For this reason, production of highly efficientcatalysts to enhance the catalytic parameters in the production of hydrogen from ABis of great importance for the development of hydrogen energy and its extensiveusage.In this thesis, to produce catalyst for hydrogen generation from aqueous AB undermild condition a novel support material, polythiophene, was used to immobilize thepalladium nanoparticles by using a wet impregnation method. The prepared catalystshows good catalytic activity at 25 °C. An initial turnover frequency (TOF) value iscalculated as 28.9 min-1. Furthermore, PdNPs, which are loaded on polythiophenesupport, show high stability and reuse property.


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