Carbon dioxide reforming of methane is studied on Ni/γ‐Al2O3 catalysts prepared using atomic layer deposition (ALD) as well as impregnation methods. Different Ni contents are studied to select the most suitable catalyst for this reaction. The results show that Ni loading has a vital impact on the catalytic performance. For the ALD samples, when Ni loading increases from 0.8% to 1.6%, the amount of NiO increases dramatically, leading to a better catalytic activity. However, further increasing Ni loading to 2.0% does not obviously enhance the catalytic performance. Due to the moderate NiO‐γ‐Al2O3 interaction and the small size of Ni particles, ALD samples show superior activities and stabilities when compared with those of the impregnation samples.
ZnO/ZrO2 samples were obtained by impregnation ZnO on three different ZrO2 polymorphic phases: monoclinic, tetrahedral and amorphous. The catalysts were tested for CO2 hydrogenation to methanol and the structure was determined using nitrogen physisorption, scanning electron microscope (SEM), Fourier transform infrared (FT‐IR) pyridine adsorption, hydrogen temperature‐programmed desorption (H2‐TPD), CO2‐TPD and X‐ray photoelectron spectroscopy (XPS). The results showed that the ZnO/tm‐ZrO2‐500 catalyst, with a mixture of both tetrahedral and monoclinic ZrO2 phases, had the highest CH3OH yield among all the samples. The yield of methanol is correlated to the lattice oxygen content for all the catalysts. During the reaction, formate and methoxy species seemed to be the active intermediate species.
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