Methanation of CO in hydrogen-rich gas on Ni–Ru/SiO2 catalyst: The type of active sites and Ni–Ru synergistic effect

Bimetallic Ru-Ni/TiO2 catalysts for hydrogenation of N-ethylcarbazole: Role of TiO2 crystal structure

“…Temperature-programmed reduction in H 2 (H 2 -TPR) provides useful information on Ru-Ni interaction [26,28,31,33,[52][53][54][55][56][57] . H 2 -TPR is carried out on the oxide precursor prepared by heating metal salt impregnated TiO 2 in air at 200 °C.…”

“…More intriguingly in many cases, bimetallic catalysts even exhibit better catalytic performances despite the reduced noble metal amount [23][24][25] . Ru-Ni bimetallic catalysts have been adopted in many catalytic processes like selective CO methanation [26][27][28][29][30] , hydrolysis of ammonia borane [31,32] , aqueous phase guaiacol hydrogenolysis [33] and benzene hydrogenation [34][35][36][37] . According to phase diagram of Ru and Ni, these two metals are intrinsically immiscible [38] .…”

Clarification of Active Sites at Interfaces between Silica Support and Nickel Active Components for Carbon Monoxide Methanation

“…Some efforts had been shown to study the active sites on Ni-based catalysts. Agnelli et al [19] found that the active sites of Ni/SiO 2 comprised one to two adjacent Ni atoms, which were free from adsorbed CO. Liu et al [20] proposed that defect sites on the metallic Ni 0 particles dominated the reaction activity. The reaction mechanism on the Ni(111); was studied by experiments and DFT [21,22].…”

Enhanced sintering resistance of bimetal/SBA-15 catalysts with promising activity under a low temperature for CO methanation

“…Recently, bimetal catalysts exhibited good catalytic ability owing to the enhancement of the metalsupport interaction and electronic effect. Studies have shown that noble metals (Ru 12 and Pt), transition metals (Mo and Fe 13 ) and rare earth metals (La 14 and Ce 15 ) can improve the performance of Ni-based catalysts via electronic or structural effects. Ryuji Kikuchi et al 16 prepared Ru-M/TiO 2 catalysts doped with different metals (M ¼ Ni, Co, Fe, La and K) and they found that the introduction of Co and La improved both the CO and CO 2 methanation activity.…”