| Summary: | The performance of nickel oxide catalysts was investigated using temperature programmed reduction (TPR) with promoter doping consisting of main group and transition metals in a mixture atmosphere of carbon monoxide (CO) and nitrogen (N2) (40:60 percent, vol/vol). The catalysts were prepared by wet-impregnation with a metal loading of 5 wt.% and characterized using X-ray diffraction (XRD) and N2-adsorption-desorption. TPR results revealed that metal doped Co improved NiO reduction (NiO →Ni0) without intermediate phase during half of the reaction at 500 °C for 60 minutes. The promoter's physicochemical and textural properties influence metal-promoter interaction, crystallite size, and metal dispersion. Among these promoters, Co as a dopant has demonstrated superior performance in nickel oxide reduction behaviors, which was attributed to these elements' ability to prevent carbon accumulation on the active Ni components. © 2024 Author(s).
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