الفهرس 
Title : Development of Efficient Nanoparticles-based Catalysts for Energy Conversion Applications
AbstractOnly 14 pages are availabe for public view
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Abstract
The growing energy demands motivate researchers to achieve the maximum benefit from renewable sources. Solar and wind sources coupled with energy storage and conversion systems are considered the most promising systems. Storage and conversion reactions with improved kinetics give rise to more efficient systems. Hydrogen evolution reaction (HER) in alkaline medium as a storage reaction is one of the most improvement-targeted reactions. In this study using the dynamic hydrogen bubble template (DHBT) method, we successfully fabricated two types of catalysts which are classified among the most active reported catalysts for HER in alkaline medium. The first catalyst is a microporous electropassivated film of ternary NiCoFe alloy. This film needs a substantially low overpotential of -50 mV to deliver a current density of 10 mA cm-2. The second catalyst is a microporous electropassivated nano-denderitic nickel-doped cobalt foam which achieved a current density of 10 mA cm-2 at an overpotential lower than -50 mV.The obtained results shed light on the effect of electropassivation on the electrocatalytic activity towards alkaline HER via the developed metal/oxygenated metal interfaces which have long been proven systems to facilitate the retarding water dissociation step