We examined oxidative coupling of methane (OCM) over various Ce-W-O catalysts at 423 K in an electric field. Ce2(WO4)3/CeO2 catalyst showed high OCM activity. In a periodic operation test over Ce2(WO4)3/CeO2 catalyst, C2 selectivity exceeded 60% during three redox cycles. However, Ce2(WO4)3/CeO2 catalyst without the electric field showed low activity, even at 1073 K: CH4 Conv., 6.0%; C2 Sel., 2...

the nanoparticles of ni–si mixed oxides were prepared by co-precipitation method using nickel nitrate; ni(no3)2 6h2o and tetraethylorthosilicate (teos). the products were characterized by x-ray diffraction (xrd), transmission electron microscopy (tem), and hydrogen temperature program reduction (h2-tpr). the results revealed that ni–si mixed oxides particles were obtained with average particle ...

In order to improve the ability of SCR catalyst catalyze oxidation gaseous elemental mercury, a series novel Ce modified (Selection Catalytic Reduction, V2O5–WO3/TiO2) catalysts were prepared via two-step ultrasonic impregnation method. The performance Ce/SCR on Hg0 and NO reduction as well catalytic mechanism was also studied. XRD, BET measurements XPS used characterize catalysts. results show...

In this paper, we reported the fabrication, characterization, and application of carbon nanotube (CNT)-platinum nanocomposite as a novel generation cathode catalyst in microbial fuel cells (MFCs) for sustainable energy production wastewater treatment. The efficiency nanocomposites was compared by platinum (Pt), which is most effective common catalyst. This utilized to benefit from catalytic pro...

Fe–Cu–ZSM-5 and Ce–Fe–Cu–ZSM-5 solids prepared using solid-state ion exchange method (SSIE) were tested in the NH3–SCR of NO reaction characterized N2 physisorption at 77 K, MAS 27Al magnetic resonance, X-ray diffraction, scanning electron microscopy, EPR spectroscopy transmission microscopy coupled to energy-dispersive order follow effect Ce addition on textural structural properties Fe–Cu–MFI...

Series of mixed metal oxides were synthesized by gel-combustion method and their catalytic activities for soot oxidation were investigated. The catalysts were M-Ce-Zr (M = Mn, Cu, Fe, K, Ba, Sr), and xK-20Mn-Ce-Zr (x = 0, 5, 10, 20), they were characterized by XRD, SEM, TPR and BET surface area techniques. The results of soot temperature programmed oxidation (TPO) in an O2 oxidizing atmosphere ...