Reduction behaviors of main group and transition metals doped NiO catalysts

• Published in: AIP Conference Proceedings
• Main Author: Samidin S.; Sulhadi S.S.; Lahuri A.H.; Dzakaria N.; Isahak W.N.R.W.; Jamil S.M.; Yarmo M.A.; Yusop M.R.
• Format: Conference paper
• Language: English
• Published: American Institute of Physics Inc. 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184601602&doi=10.1063%2f5.0187740&partnerID=40&md5=76305008acf733bb96ccc4910567e963

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).