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PREPARATION OF SILVER-COPPER BIMETALLIC NANOPARTICLES ADDED SILICA COATED-COBALT FERRITE MAGNETIC NANOPARTICLES FOR HYDROGEN PRODUCTION FROM AMMONIA BORANE

Oluşturulma Tarihi: 01-08-2016

Niteleme Bilgileri

Tür: Tez

Alt Tür: Yüksek Lisans Tezi

Yayınlanma Durumu: Yayınlanmamış

Dosya Biçimi: PDF

Dil: İngilizce

Konu(lar): Kimya, Kimya mühendisliği,

Yazar(lar): Mohammed, Salma S. Abdalla (Yazar),

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

Anahtar Kelimeler

Hydrogen evolution, magnetic nanocatalyst, hydrogen energy, magnetic separation, ammonia borane 


Özet

Hydrogen known as one of the most important clean energy source and finding proper hydrogen storage material and method to generate hydrogen from it is one of the most difficult issue for mobile applications. There are a lot of publication in literature related to hydrogen storage materials like metal hydrides, chemical hydrides, organic molecules, metal organic frameworks and carbon nanotubes. Among them chemical hydrides has attracted great attention due to their high hydrogen storage capacity. Ammonia borane, with 19.6 wt % hydrogen content, known as the important hydrogen storage material besides stability and nontoxicity. By using proper catalyst it is possible to get three moles of hydrogen per mole of ammonia borane at mild conditions. The development of high-efficiency catalysts to improve the kinetic parameters in the hydrogen production from ammonia borane under mild conditions is so important for mobile application of hydrogen energy.   In this study, a facile way for preparing magnetically recyclable CoFe2O4@SiO2 supported  Silver-Copper  nanoparticles as catalyst for hydrolytic dehydrogenation of aqueous AB by a wet impregnation method were reported.    v  The prepared catalysts show excellent catalytic activity toward the hydrolytic dehydrogenation of aqueous AB at room temperature. An initial turnover frequency (TOF) value is calculated as 146 min-1. Furthermore, AgCuNPs which are loaded on CoFe2O4@SiO2 support exhibit remarkable stability and reuse capability and keep almost their initial activity with total conversion after 10th reuse in the hydrogen generation from ammonia borane


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