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In the present study, Ta/La2O3 films (La2O3 doped with Ta2O5) as a gate dielectric were prepared using a sol–gel method at low pressure. Ta/La2O3 film has some hopeful properties as a gate dielectric of logic device. The structure and morphology of Ta/La2O3 films were studied using X-ray...
Persistent link: https://www.econbiz.de/10011106352
Amorphous materials as diverse as foams, emulsions, colloidal suspensions and granular media can jam into a rigid, disordered state where they withstand finite shear stresses before yielding. Here we give a simple introduction to the surprising physics displayed by a very simple model system for...
Persistent link: https://www.econbiz.de/10010873961
In the present work we match the biased hierarchical continuous-time random flight (HCTRF) on a regular lattice (based on hierarchical waiting-time distribution) and the extreme event theory (EVT). This approach extends the understanding of the anomalous transport and diffusion (for example,...
Persistent link: https://www.econbiz.de/10011063698
Hydrogen production based in the corrosion of light metals in water solutions is an interesting alternative. Among all of them, Mg is probably the most adequate metal for energetic purposes due to its high electron density and oxidation potential. A safe and environmental-friendly method of...
Persistent link: https://www.econbiz.de/10011190881
This study reports the development of a new system of IL (ionic liquid) with metal complex, chemically crosslinked, electrospun nanofibers based on PVDF (poly(vinylidene fluoride)) as a polymer matrix. The nanofibers were fabricated with different amounts of ionic liquid, PEG (polyethylene...
Persistent link: https://www.econbiz.de/10011190941
High purity hydrogen produced by hydrolysis of sodium borohydride can be used directly in (proton exchange membrane) PEM fuel cells for portable devices and automotive applications. The advantages of high storage capacity, quickly start, controllable reaction and mild condition, hydrogen...
Persistent link: https://www.econbiz.de/10010811276
Ferromagnetic elements Fe, Ni and Co were immobilized on the porous SiO2 to catalyze the hydrogen generation from aqueous alkaline NaBH4 (sodium borohydride). The porous SiO2 was prepared by silica-surfactant self-assembly and the ferromagnetic catalyst was prepared by chemical reduction. The...
Persistent link: https://www.econbiz.de/10011053240
In this study, a new novel bench-scale (5 L) tubular photocatalytic reactor was developed and its feasibility studies were conducted for optimizing the operating variables, namely concentration of sulfide ion, concentration of sulfite ion, pH, catalyst concentration, lamp power, volume of...
Persistent link: https://www.econbiz.de/10011053622
significantly affect the final hydrogen yield and reaction kinetics. Among all studied samples, 6 h-milled Mg–3 mol% AlCl3 shows the …
Persistent link: https://www.econbiz.de/10011053766
This paper presents the exergoeconomic analysis of a novel process generating electric energy and hydrogen. Coal and high-temperature heat are used as input energy to the process. The process is a true “zero-emission process” because (a) no NOX is formed during coal combustion with sulfuric...
Persistent link: https://www.econbiz.de/10011054150