Ethylene oxide (EO) is industrially produced by epoxidation of ethylene on Ag-based heterogeneous catalysts. Electrophilic oxygen species are assumed to be active key in the EO production. This study explores possibility electrochemically these a solid electrochemical cell. Two series Ag based cermet electrodes were prepared either with Yttria Stabilized Zirconia (YSZ), pure ionic conductor, or...

Metal-based heterogeneous catalysts mostly consist of supported nanoparticles a few nanometers in size, since these objects provide good compromise between exposed active surface area and structural stability. However, far from being static, constantly evolve under reaction conditions, thereby creating removing sites response to their gaseous or liquid reactive environment. Modern ex situ inves...

High dispersion of Sn in beta (?) zeolites is pivotal to obtain highly active Sn? catalysts with high productivity. However, at higher loadings, and the activity per decrease. The present work highlights augmentation catalytic Baeyer–Villiger oxidation Meerwein–Ponndorf–Verley reactions as-synthesized loadings up 10 wt % by tandem reduction–reoxidation discusses effect terms Lewis acid (LA) den...

The present research focuses on a Ni-Mg-Al hydrotalcite-derived catalyst promoted with Cu. Catalysts were prepared by the co-precipitation method at constant pH and subsequently characterized via XRD, H2-TPR, CO2-TPD, TGA, XAS, TEM, low-temperature nitrogen sorption tested for CO2 hydrogenation to methane. methanation reaction was carried out GHSV of 12,000 ml?g-1 h-1 high selectivity (above 98...

We synthesized a series of modified Co-ZIF-67 materials with tunable morphology to support fine Au nanoparticles for the alkali-free aerobic oxidation benzyl alcohol. Structure promotion was performed using Stöber silica as hard template, which subsequently removed by NaOH etching before gold immobilization. The texture structure Au/(Si)C greatly improved increasing surface area and volume. CoO...

Metal nanoparticles on the surface of porous supports have found numerous applications in different areas science. Fischer-Tropsch synthesis, which proceeds cobalt metal nanoparticles, is an efficient way to convert renewables and fossil feedstocks into alternative fuels. The stability catalysts essential even crucial parameter can be significantly improved by promotion. In this paper, a combin...

Binder jetting is establishing more and in the ceramic industry to produce large complex shaped parts. A parameter with a great impact on quality of parts binder–powder interaction. The use slurries as feedstock for this process, such layerwise slurry deposition–print technology, allows flexibility composition. Such are typically composed powder, water, small amounts various additives. understa...

Suspension preparations are made because some of the active substances have a solubility that is practically insoluble in water, but required liquid form. Among medicinal plants water papaya seeds (Carica L.) and teki grass tubers (Cyperus rotundus L.), so they form suspension to produce stable preparations. Papaya pharmacological activities as antibacterial, laxative pancreatic lipase inhibito...

Single-walled carbon nanotubes (SWCNTs) dispersed in aqueous medium have many potential applications in chemistry, biology, and medicine. Reversible aggregation of SWCNTs dispersed in water has been frequently reported, but the mechanisms behind are not well understood. Here we show that SWCNTs dispersed into aqueous medium assisted by various charged molecules can be reversibly aggregated by a...