| 總結: | Ni-based catalysts have been widely used for the CO<sub>2</sub> reforming of methane (CRM) process, but deactivation is their main problem. This study created an alternative electronic Ni-NiO-CeO<sub>2</sub> interaction on the surface of 5 wt% Ni-5 wt% CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub>-MgO (5Ni5Ce(xh)/MA) catalysts to enhance catalytic potential simultaneously with coke resistance for the CRM process. The Ni-NiO-CeO<sub>2</sub> network was developed on Al<sub>2</sub>O<sub>3</sub>-MgO through layered double hydroxide synthesis via our ammonia vapor diffusion impregnation method. The physical properties of the fresh catalysts were analyzed employing FESEM, N<sub>2</sub> physisorption, and XRD. The chemical properties on the catalyst surface were analyzed employing H<sub>2</sub>-TPR, XPS, H<sub>2</sub>-TPD, CO<sub>2</sub>-TPD, and O<sub>2</sub>-TPD. The CRM performances of reduced catalysts were evaluated at 600 °C under ambient pressure. Carbon deposits on spent catalysts were determined quantitatively and qualitatively by TPO, FESEM, and XRD. Compared to 5 wt% Ni-5 wt% CeO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub>-MgO prepared by the traditional impregnation method, the electronic interaction of the Ni-NiO-CeO<sub>2</sub> network with the Al<sub>2</sub>O<sub>3</sub>-MgO support was constructed along the time of ammonia diffusion treatment. The electronic interaction in the Ni-NiO-CeO<sub>2</sub> nanostructure of the treated catalyst develops surface hydroxyl sites with an efficient pathway of OH* and O* transfer that improves catalytic activities and coke oxidation.
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