Journal ArticleDOI
Sodium-hypophosphite as a novel reducing agent in the preparation and characterization of silver/silica gel catalysts
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TLDR
In this paper, new catalysts with different loading 2, 5, 8 and 11 (wt.%) silver on silica gel were prepared by chemical reduction method using a sodium-hypophosphite as a novel reducing agent.Abstract:
New catalysts with different loading 2, 5, 8 and 11 (wt.%) silver on silica gel were prepared by chemical reduction method using a sodium-hypophosphite as a novel reducing agent. The catalytic activity was studied through the dehydrogenation of ethanol in a micro catalytic pulse system at 300–450 °C and at hydrogen flow rate 50 mL/min. The structural changes that accompanying the catalysts preparation were detected by X-ray diffraction, differential scanning calorimetry and infrared techniques. Results show that ethanol dehydrogenation was mainly dependent on the silver content and metal-support interaction. In other words, catalyst sample containing 8% Ag was found the most active and selective for acetaldehyde formation and that contain 11% Ag is rich with silver silicate in certain mode. A texture property of the prepared catalysts was investigated.read more
Citations
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High-surface-area zinc aluminate supported silver catalysts for low-temperature SCR of NO with ethanol
TL;DR: In this paper, the NOx selective catalytic reduction of ethanol (EtOH-SCR) was studied using a complex gas mixture representative of a diesel exhaust, over zinc alumina mixed oxide supported silver catalysts.
Journal ArticleDOI
Silver modified porous silica from rice husk and its catalytic potential
TL;DR: In this article, a rice husk silica modified with Ag (RH-Ag) and its calcined form, RH-Ag(C) is used as a catalyst for the formation of dibenzyl ether.
Journal ArticleDOI
Alcohol-Assisted CVD of Silver Using Commercially Available Precursors
Naoufal Bahlawane,Peter Antony Premkumar,Armin Brechling,Günter Reiss,Katharina Kohse-Höinghaus +4 more
TL;DR: In this paper, a novel chemical approach was demonstrated for the growth of high-quality, silver films by CVD, which relies on the catalytic reactivity of cationic silver, and of silver surfaces with alcohols.
Journal ArticleDOI
Cobalt powders and porous cobalt particles prepared by co-reduction of hydrazine and sodium phosphate and its formation mechanism
TL;DR: In this article, the reduction efficiency of individual reducing agents (N 2 H 4, NaH 2 PO 2 ) and the N 2H 4 ǫ+NaH 2PO 2 co-reduction system for synthesizing phase pure Co powder is investigated and comparable data are presented.
Journal ArticleDOI
Anhydrous manganese hypophosphite dense framework solid: Synthesis, structure and magnetic studies
TL;DR: Anhydrous manganese hypophosphite (Mn(H2PO2)2]n·(DMF)0.11 (1) has been isolated under solvothermal conditions from the reaction of Hypophosphorous acid (H3PO2), MnCl2·4H2O in a mixture of DMF/EtOH/H 2O (8:1:1; v/v) in 60% yield as discussed by the authors.
References
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Journal ArticleDOI
Supported Ag Catalysts for the Lean Reduction of NO with C3H6
K. A. Bethke,Harold H. Kung +1 more
TL;DR: In this article, the activities of 2 and 6 wt% Ag/Al2O3 catalysts for lean NO reduction with C3H6 were compared, and the difference in the behavior of the two catalysts was attributed to the much higher Ag dispersion for the 2 wt % than the 6 Wt % sample, such that the oxidation states of Ag were different under reaction conditions.
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Selective conversion of methanol into aromatic hydrocarbons over silver-exchanged ZSM-5 zeolites
TL;DR: In this article, the authors showed that Ag + ions have a capability of efficiently converting alkene intermediates into aromatic hydrocarbons, such as benzene, toluene, xylenes plus ethylbenzene and C 10 +.
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Deep oxidation of methane over zirconia supported Ag catalysts
TL;DR: In this paper, the reaction rate on zirconia-supported Ag particles is 0.77 order in methane and 0.37 order in oxygen, and the active phase under reaction conditions for both low and high Ag loading is the oxygen covered metallic Ag surface, as was confirmed by XPS and UV-Vis spectrometry.
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Ag–SiO2–Al2O3 composite as highly active catalyst for the formation of formaldehyde from the partial oxidation of methanol
TL;DR: In this paper, a catalytic oxidative dehydrogenation of methanol to formaldehyde was carried out over Ag-SiO 2 -Al 2 O 3 catalysts prepared by a sol-gel method, and detailed preparation conditions were investigated and the optimal preparation parameters were determined as the Si/Al molar ratio of 8.5 / 1.5 − 9 / 1, silver loading of 20 wt%, and calcination temperature of 900-1000
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Characterization of highly active silver catalyst for NOx reduction in lean-burning engine exhaust
TL;DR: In this article, a new Ag/Al2O3 catalyst for removing NOx in lean exhaust gas was developed, which is highly active for reduction of NOx with ethanol and propene.