Showing papers in "Catalysis Communications in 2009"

TL;DR: In this article, two simple ways to increase 5-hydroxymethylfurfural (HMF) yield (selectivity) in fructose dehydration with various solid acid catalysts were demonstrated.

TL;DR: In this article, ceria modified Mn/TiO 2 was used for low-temperature selective catalytic reduction (SCR) of NO with NH 3 in the presence of SO 2.

TL;DR: In this paper, the catalysts were used in the catalytic conversion of glucose to 5-hydroxymethylfurfural, achieving a yield of 47.6% within 4h at 403 K over SO 4 2− /ZrO 2 −Al 2 O 3 with Zr−Al mole ratio of 1:1.

TL;DR: In this article, a visible-light responsive photocatalyst BiVO4 was synthesized and its photocatalytic reduction of CO2 in water was examined, and the selective formation of ethanol under the condition of high intensity visible light irradiation, and suggests that intense irradiation generates a large number of C1 intermediate species anchored on the surface of BiVO, which dimerize to form ethanol.

TL;DR: Bimetallic PtSn catalysts, containing different amounts of tin, were obtained by means of controlled surface reactions and used in the liquid-phase hydrogenation of furfural as discussed by the authors.

TL;DR: In this article, the effect of particle size on the catalytic activity of H-ZSM-5 zeolite in the methanol to propylene (MTP) reaction was investigated in a fixed-bed flow reactor under the operating conditions of T =460°C, P = 1m, and WHSV = 1h−1.

TL;DR: Sulfated zirconia is an effective catalyst for producing 5-hydroxymethylfurfural (5-HMF) from fructose in nonaqueous solvent but shows low catalytic activity in water solvent as discussed by the authors.

TL;DR: In this paper, a modified high silica HZSM-5 catalysts have been used to selectively transform methanol to propylene (MTP) and the enhancement of propylene selectivity and catalytic life can be attributed to partial elimination of the strong acid sites on the HZ SM-5 catalyst.

TL;DR: In this paper, the photocatalytic efficiency of the Cu2O/TiO2 nano-nano heterostructures was evaluated by degradation of acid orange II in water under UV-vis light and visible light irradiation.

TL;DR: Au and Pt metallic phase were formed late during flame spray pyrolysis (FSP) after ZnO was formed as mentioned in this paper, and the average particle/cluster sizes were ranged between 3 and 7nm depending on the amount loading.

TL;DR: In this article, Ni/CeO 2 /α-Al 2 O 3 was used to obtain hydrogen by steam reforming of glycerol, and the most stable system resulted in Ni and CeO 2, which can be explained by the Ce effect in inhibition of secondary dehydration reactions forming unsaturated hydrocarbons that are coke precursors.

TL;DR: In this article, a series of SO3H-functionalized ionic liquids were used as catalysts for esterification of aliphatic acids with alcohols using the Hammett method.

TL;DR: In this article, the effects of reaction temperature and the interactions between CeO2 and Al2O3 on the performance of NO selective catalytic reduction with ammonia were studied, and it was shown that the catalyst containing 9 wt% Al 2 O3 and 13 wt % CeO 2 has the highest activity in the temperature range 250-350 °C at a space velocity of 3000 h−1.

TL;DR: In this paper, a series of Pt/C catalysts with different Pt particle size ranged from 1.2 to 26.5 µm were prepared and used for the oxidation of glycerol in a base-free aqueous solution.

TL;DR: In this article, the performance of monometallic (Ni and Pt) and bimetallic (Pt-Ni) catalysts and the effect of lanthana-modified alumina support in the glycerol steam reforming to produce hydrogen were studied.

TL;DR: In this paper, the photo catalysts were characterized by various analytical techniques, including XRD revealed only anatase phase for Mo6+−TiO2 and mixed phase for Mn2++TiO 2 samples.

TL;DR: In this paper, the esterification of glycerol with acetic acid was carried out over dodecamolybdophosphoric acid (PMo) encaged in the USY zeolite.

TL;DR: In this article, a visible light TiO2 photocatalyst was prepared by a surface chemical modification process with toluene 2,4-diisocyanate (TDI).

TL;DR: In this article, the effect of alkali promoters on N 2 O decomposition in dry and wet (1% H 2 O) conditions over Co 3 O 4 was investigated.

TL;DR: In this article, the effect of the MgO content on the basicity and on the catalytic performance of Ni/ZrO 2 -MgO catalysts for carbon dioxide reforming of methane was studied.

TL;DR: Hybrid CP-MS41 architectures ordered by covalently bound ionic species were synthesized via a template-directed, self-assembling process of tetraethoxysilane (TEOS) with 3-chloropropyltriethioxysilanes (ClPTES).

TL;DR: In this article, the effects of urea/nitrate ratio on physicochemical and catalytic properties were studied by XRD, BET, H 2 -TPR and reactive N 2 O adsorption techniques.

TL;DR: In this paper, the H3PO4 modified catalysts were found to be highly active and selective towards ethylene during ethanol dehydration at 673 K. However, the selectivity was found to strongly depend on the content of H 3PO4, reaction temperature and WHSV.

TL;DR: In this paper, the photocatalytic removal of sodium pentachlorophenate (PCP-Na) over BiOI nanosheets under simulated solar light irradiation has been studied.

TL;DR: Ag@C core/shell nanocomposite was synthesized by a hydrothermal process and demonstrated as a new plasmonic photocatalyst as discussed by the authors, which exhibited high photocatalytic activity in the decomposition of aqueous tetraethylated rhodamine (RhB) and gaseous acetaldehyde (CH3CHO) under visible-light irradiation.

TL;DR: In this paper, the photocatalytic decomposition of PFOA with a wide bandgap photocatalyst, i.e., β-Ga 2 O 3 under 254nm UV irradiation was investigated.

TL;DR: In this paper, nano-sized silver particles on silica (Ag/SiO 2 ) were synthesized from the precursors silver nitrate and silver carboxylate [AgO 2 C(CH 2 OCH 2 ) 3 H], respectively, and a mean particle diameter in the range of 4-8nm could be detected via TEM.

TL;DR: In this article, selective catalytic Knoevenagel condensation is achieved with catalytic amounts of Ni impregnated on SiO2 or TiO2 supports.

TL;DR: In this article, a variety of aliphatic and aromatic sulfides are subjected to the sulfoxidation reaction by treatment of sodium perborate (SPB) and/or sodium percarbonate(SPC), silica sulfuric acid (SSA), and catalytic amounts of KBr in the presence of wet SiO2 (50% w/w) in dichloromethane at room temperature with moderate to good yields.

TL;DR: In this paper, the catalytic activity and stability for the oxidation of methanol were studied by using cyclic voltammetry and chronoamperometry, and the Pt/V2O5-C composite anode catalyst on glassy carbon electrode showed higher electro-catalytic activity for the reduction of chloroplatinic acid with formaldehyde.