نتایج جستجو برای: zro2
تعداد نتایج: 3340 فیلتر نتایج به سال:
Ni–CeO2–ZrO2 Catalysts for Water Gas Shift Reaction: Effect of CeO2
Nanocomposite of ZrO2/Polymer Thin-Film Coatings by The Ionically Self-Assembled Monolayer Technique
ii Nanocomposite of ZrO2/Polymer Thin-film Coatings by The Ionically Self-Assembled Monolayer Technique
The effect of crystal structure Y-doped ZrO2 as support on the three-way catalytic performance Rh catalyst was investigated. supported 3Y-ZrO2 with tetragonal phase showed higher activity than that 3Y/ZrO2 monoclinic phase. difference in Rh–support oxide interaction suspected from measurements temperature-programmed reduction by CO (CO-TPR). use found to contribute formation easily reducible sp...
cazro3 nanoceramics were successfully synthesized at 700 c using the molten salt method, and the effects of processing parameters, such as temperature, holding time, and amount of salt on the crystallization of cazro3 were investigated. cacl2, na2co3, and nano-zro2 were used as starting materials. on heating, cacl2–nacl molten eutectic salt provided a liquid medium for the reaction of caco3 an...
Ni nanoparticles supported on ZrO2 are a prototypical system for reforming catalysis converting methane to synthesis gas. Herein, we examine this catalyst on a fundamental level using a 2-fold approach employing industrial-grade catalysts as well as surface science based model catalysts. In both cases we examine the atomic (HRTEM/XRD/LEED) and electronic (XPS) structure, as well as the adsorpti...
H5PV2Mo10O40 polyoxometallate Keggin clusters supported on ZrO2, TiO2, SiO2, and Al2O3 are effective catalysts for CH3OH oxidation reactions to form HCHO, methyl formate (MF), and dimethoxymethane (DMM). Rates and selectivities and the structure of supported clusters depend on the surface properties of the oxide supports. Raman spectroscopy showed that Keggin structures remained essentially int...
Austenitic stainless steels are high performance steels that have various applications in solid oxide fuel cells and boiler tubes under high temperature operating conditions. The Cr2O3 oxide layer formed on the steel surface becomes unstable at high temperatures and reduces the oxidation resistance of the steel. Therefore, protection of these steels at high temperatures is essential. Therefore,...
Here, we successfully developed the undoped, Ni2+, Cu2+, and Zn2+ doped Zirconia nanoparticles (ZrO2 NPs) by a simple co-precipitation method at room temperature and characterized by various physicochemical measurement techniques to investigate their structure, morphology, and sizes of the particles. The bandgap energy values of doped and undoped ZrO2 NPs were estimated using optical absorption...
In recent years, functionalized metal oxides have been gaining popularity for biomass conversion to fuels and chemicals due the global energy crisis. This study reports a novel catalyst based on noble immobilization zirconia that has successfully used in production of biofuel alkyl levulinates (ALs) from lignocellulosic biomass-derived levulinic acid (LA) under vapor-phase. The wet impregnation...
در این پایاننامه مشتقات پیران و پیریدین در حضور کاتالیستهای اسیدی جامد بر پایه سیلیکای مزوپور سنتز شدهاند. کاتالیست zro2/fe3o4@ mcm-41 سولفاته شده (so42-/zro2/fe3o4@ mcm-41) در شرایط مختلف سنتز شده است و مشخصات آن با روشهای ft-ir، xrd و sem تعیین گردیده است. نتایج بهدست آمده نشاندهنده وجود ساختار مزوپور کاتالیست است. فعالیت کاتالیستی so42-/zro2/fe3o4@ mcm-41 با نسبت 9/1 si/zr=و 5/1si/...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید