https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40878 99% of the equilibrium yield CO conversion at 260 ℃. An increase in the converted CO, oxidation and H₂ productivity with the integral steam content in gaseous feed flow was achieved. The heterogeneous phase processing at the correlated pH of 7.6 demonstrated the highest formed CO product at the temperature of 200 ℃, compared with literature. This is particularly promising for reagent purity hydrogen-fed fuel cells. The kinetics for each co-precipitated solid was evaluated regarding the efficiency for the WGS in a fixed bed reactor.]]> Mon 29 Jan 2024 17:56:12 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38272 3 over Cu–Zn catalysts, supported on ceria and titania, was investigated, producing carbon (di)oxide-free H₂. The rate of the H₂ formation at the exposed metallic Cu atoms (cumulative turnover frequency) for dispersed Cu–Zn depended strongly on the type of metal oxide support, indicating that the pathway active sites of Cu–Zn nano-catalysts were not identical in quantity. The investigation of the associative desorption process of atomic nitrogen moieties formed by the NH₃ scission over Cu–Zn alloy revealed that N₂ interface evolution temperature was affected by the nature of substrates. The characterization of the nanomaterials before the catalyzed splitting reactions of NH₃ was carried out by XRD, N₂ physisorption, N₂O chemisorption, H₂ TPD, CO₂ TPD, NH₃ TPD and H₂ TPR. TEM and XPS were conducted on both fresh and used composites. Cu–Zn dispersion increased in the presence of TiO₂. These spinel forms exhibited a strong Cu_0.5Zn_0.3Ti_0.2O_2–x (x = 0–1) structure interaction. Cu–Zn/CeO₂ showed a 79% conversion of ammonia at 600 °C, whereas Cu–Zn/TiO₂ demonstrated 63% at comparative operating conditions. A high catalytic activity, reflected in almost total consumption of ammonia at 700 °C with the hydrogen reactive production of 33.2 mmol g⁻¹ min⁻¹, was achieved over Cu–Zn/TiO₂. No reactivity loss considering the NH₃ depletion under applied reactor runs was detected, implying that materials had excellent time-on-stream stability. By scanning and transmission electron microscopy, bimetallic Cu–Zn was also observed, displaying a uniform TiO₂ particle distribution on a structured sample surface. Impregnated zinc and copper species were uniformly distributed over Cu–Zn/TiO₂. In the case of higher precursor content, a slight Cu domain agglomeration was noted. A heterogeneous mixed phase of Cu and Cu₂O was present in all examined powders, as exposed by Cu L-edge spectra ratios.]]> Fri 20 Aug 2021 13:19:31 AEST ]]>