https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Effect of Desilication On the Catalytic Activity of Fe-FER For Direct, Selective, Partial Oxidation of Methane https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50501 Thu 27 Jul 2023 12:28:40 AEST ]]> Methane oxidation by N₂O over Fe-FER catalysts prepared by different methods: nature of active iron species, stability of surface oxygen species and selectivity to products https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46380 Thu 17 Nov 2022 13:38:16 AEDT ]]> A designed organic-zeolite hybrid acid-base catalyst https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20342 Sat 24 Mar 2018 08:02:57 AEDT ]]> Copper-catalyzed oxidative methyl-esterification of 5-hydroxymethylfurfural using TBHP as an oxidizing and methylating reagent: a new approach for the synthesis of furan-2,5-dimethylcarboxylate https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38914 tert-butyl hydroperoxide (TBHP) as an oxidizing and methylating reagent catalyzed by mesoporous alumina nanospheres-embedded with CuO nanoparticles (CuO/m-Al2O3). The CuO/m-Al2O3 catalysts with different copper contents were prepared by evaporation-induced self-assembly of a structure-directing agent (Pluronic P-123). The decomposition of P-123 during calcination in air results into the formation of a mesoporous structure with highly dispersed CuO nanoparticles. The as-prepared 6-CuO/m-Al2O3 exhibits excellent catalytic activity towards oxidative methyl-esterification of HMF into FDMC with 92% yield and turnover frequency (TOF) of 0.56 h-1. Furthermore, oxidative methyl-esterification of a range of substrates through SP3 C-H bond functionalization has also been demonstrated using the same catalyst.]]> Mon 29 Jan 2024 18:05:17 AEDT ]]> Hydrodeoxygenation of guiacol over ion-exchanged ruthenium ZSM-5 and BEA zeolites https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39234 4+ cations in zeolites with Ru3+ ions, are employed for the hydrodeoxygenation of guaiacol. The performance results indicate ion-exchanged Ru zeolites, with extremely low Ru contents (~0.2 wt%), possess a high intrinsic HDO activity compared to the catalysts prepared by the incipient wetness impregnation method. On the basis of TEM, FTIR, XPS and TPD analysis, the NH4+ ions in zeolite were substituted by Ru species, with metal particles entered the zeolite cages and finely dispersed on the support. These ion-exchanged Ru particles exhibit a strong electronic interaction with oxygen atoms of zeolite framework with a mixed Ru(0)-Ru(III) species observed in the reduced samples. In contrast, only Ru0 was detected in the reduced impregnated Ru/ZSM-5. The partial-reduced Ru species over the ion-exchanged Ru/ZSM-5 catalyst shows a high H2 adsorption activity facilitating the hydrogenation of guaiacol to the saturated products (such as 2-methoxycyclohexanol). In addition, ion-exchanged Ru-ZSM-5 and Ru-BEA catalysts present a similar normalized cyclohexane formation rate (based on the concentration of acid sites), suggesting the acid sites play a pivotal role in the deoxygenation of 2-methoxycyclohexanol to cyclohexane.]]> Fri 27 May 2022 13:36:26 AEST ]]> Mechanistic insights into the Knoevenagel condensation reaction over ZnO catalysts: direct observation of surface intermediates using in situ FTIR https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47765 Fri 27 Jan 2023 11:07:04 AEDT ]]> Hydrodeoxygenation of guaiacol over BEA supported bimetallic Ni-Fe catalysts with varied impregnation sequence https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39742 Fri 17 Jun 2022 18:27:05 AEST ]]> Advanced in situ IR spectroscopy study of anisole hydrodeoxygenation over Ni/SiO2 catalysts https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:53581 Fri 08 Dec 2023 15:48:29 AEDT ]]>