Harshini, D. Lee, Dae Hyung Kim, Yongmin Nam, Suk Woo Han, Jong Hee Ham, Hyung Chul Yoon, Chang Won 2024-01-20T10:02:51Z 2024-01-20T10:02:51Z 2021-09-05 2014-04 1011-372X https://pubs.kist.re.kr/handle/201004/126933 Ni/Ce0.65Hf0.25M0.1O2-delta (Ni/CH-M, M = Tb, Sm, Nd, Pr, and La), Ni-based catalysts supported on CeO2-HfO2 materials incorporated with rare earth elements, were prepared by a solvothermal method. The resulting catalysts were found to have surface areas ranging from 41 to 47 m(2)/g, and they proved to possess strong metal-to-support interactions, as evidenced by temperature programmed reduction analyses. Upon utilization of these catalysts for dry reforming of methane (DRM) with a CH4/CO2 ratio of 1 at a range of 600 to 900 degrees C, the Ni/CH-M catalysts were found to have higher activities than the Ni/CH catalyst. In addition, the activities proved to increase in the order of Ni/CH-Pr>Ni/CH-La similar to Ni/CH-Tb>Ni/ CH-Nd similar to Ni/CH-Sm>Ni/CH. With a high CH4/CO2 ratio of 2, these Ni/CH-M materials showed better stabilities than the Ni/CH catalyst in the DRM reaction at 800 degrees C for 150 h. Moreover, the Ni/CH-M (M = Pr, Tb, and La) catalysts exhibited superior durability over other Ni materials. Consistent with the observations, transmission electron microscopy further confirmed that no carbon species were observed in the Ni/CH-M (M = Pr, Tb, and La) catalysts following the reforming reactions. English SPRINGER SOLID-SOLUTIONS OXIDES STEAM CEXZR1-XO2 BEHAVIOR CH4 Catalytic Hydrogen Production via Dry Reforming of Methane Over Ni/Ce0.65Hf0.25M0.1O2-delta (M = Tb, Sm, Nd, Pr and La) Article 10.1007/s10562-014-1192-x 1 CATALYSIS LETTERS, v.144, no.4, pp.656 - 662 CATALYSIS LETTERS 144 4 656 662 scie scopus 000332866400016 2-s2.0-84900646411 Chemistry, Physical Chemistry Article SOLID-SOLUTIONS OXIDES STEAM CEXZR1-XO2 BEHAVIOR CH4 Methane dry reforming Carbon dioxide Ceria-hafnia Rare-earth elements Oxygen storage capacity Heterogeneous catalyst