• Energy Research

AbstractThe novel catalyst system contains gold nanoparticles supported on Al‐SBA15 prepared by the ball‐milling process.

Abstract In this work, mesostructured KIL-2 silica materials were synthesized and functionalized by impregnation with two different amino sources, polyethylenimine (PEI) and Tetraethylenepentamine (TEPA), for their application to low temperature CO 2 capture. Infrared spectroscopy verified that amino groups were successfully incorporated on the surface of the silica support and within its interparticle porosity. N 2 sorption analysis of the synthesized silica materials showed a decrease in surface area and total pore volume as a result of the impregnation with the amine groups. The CO 2 capture capacity of prepared sorbents was evaluated by CO 2 adsorption/desorption isotherms at 25 °C and 90 °C. The highest sorption capacity was achieved at 90 °C for KIL-2-TEPA material (4.35 mmol/g ads), which is significantly higher than values previously reported in the literature for similar type of disordered mesopore structure materials under similar conditions.

Abstract Titanium dioxide nanoparticles were obtained by using poly-acrylic acid gel in a two-step synthesis method at room temperature using titanium (IV) chloride as titanium source. The formed nanoparticles were studied by different characterization techniques, showing that different proportion of anatase/rutile phase can be obtained by adjusting the amount of acrylic acid in the initial gel. Aluminum storage performance of the synthesized materials was also investigated, obtaining higher capacity density results at higher rutile ratio (75.1 mAh g –1 ).

Abstract Nickel-yttrium stabilized zirconium (Ni-YSZ) nanocomposite were synthesized by to different paths: mechanochemical method and a novel sol-gel method at different temperatures. Preliminary structural/textural results obtained by XRD, BET and SEM analyses showed a typical crystalline cubic structure, with small crystallite size in those nanocomposites synthesized by sol-gel method as well as higher specific surface area and uniform distribution.

Abstract Aluminum storage in rutile-based TiO2 nanoparticles was for the first time investigated. Electrochemical characteristics of rutile-based TiO2 nanoparticles as an electrode for aluminum-ion batteries were studied using cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy. The first discharge capacity of 29.4 mAh·g-1 was achieved, and the value remains 22.6 mAh·g-1 after 50 cycles. The highest coulombic efficiency achieved at 89.8%.