The VOx/γ-Al2O3 catalyst VA-200, which was introduced in a previous article, is further characterized by XPS and visible Raman spectroscopy. The reoxidation of highly dispersed VOx species with gas phase oxygen is investigated in detail and is described by an empirical kinetic model. It is observed that the reoxidation of reduced VOx/γ-Al2O3 catalyst is strongly affected by the presence of wate...

As a promising secondary battery system, lithium—sulfur (Li—S) batteries have attracted extensive attention due to their high energy density. However, the development of Li—S is hindered by detrimental shuttling soluble lithium polysulfides (LiPs) in traditional liquid electrolytes. In this work, we fabricate functional gel polymer electrolyte for batteries. This consists poly(vinylidene fluori...

Gold catalysts supported on γ-Al2O3 (Au/γ-Al2O3) were prepared by deposition-precipitation of aqueous HAuCl4 and, alternatively, by deposition of Au(CH3)2(acac) from pentane solution. The samples were characterized by in situ XANES and temperature-programmed reduction and by their performance as CO oxidation catalysts at room temperature. The Au was found to be present as Au(III) in both as-pre...

The development of Cu-based alloys with high-mechanical properties (strength, ductility) and electrical conductivity plays a key role over a wide range of industrial applications. Successful design of the materials, however, has been rare due to the improvement of mutually exclusive properties as conventionally speculated. In this paper, we demonstrate that these contradictory material properti...

In this work, the effect of pretreatment conditions (10% H2/Ar flow rate 25 mL/min and 400 °C, 3 h or 600 17 h) on catalytic performance 1 wt.% Pd/γ-Al2O3 has been evaluated for hydrogenation 2-methyl-3-butyn-2-ol in continuous-flow mode. Two palladium catalysts have tested under different pressure temperature characterized using various physicochemical techniques. The red(400 °C)-Pd/γ-Al2O3 re...

Compared with industrial used Pt- and Cr-based catalyst in dehydrogenation (DH) of light alkanes, the sulfide V-K/γ-Al2O3 reported this study shows lower cost toxicity, significant DH performance. The yield to isobutene reached as high 52.9%, which is among highest date. We attribute such precise modulation polymerization degree for vanadium species via doping potassium indicating that synergy ...