Enhanced thermal stability of Ni nanoparticles in ordered mesoporous supports for dry reforming of methane with CO2

Advanced zeolite and ordered mesoporous silica-based catalysts for the conversion of CO2to chemicals and fuels

“…Recently, the catalytic behavior of previously prepared Ni nanoparticles with a homogeneous size of ∼5 nm and further supported on ordered mesoporous silica (SBA-15), alumina and commercial silica was described. 916 The characterization and catalytic data revealed that the ordered mesoporous structures were more suitable to stabilize Ni nanoparticles due to the beneficial confinement effects preventing nanoparticle aggregation. The presence of Lewis acid sites in the case of the alumina support was responsible for higher coke formation at a lower temperature.…”

Formation of Ni Species Anchored on a Silicalite-1 Zeolite Framework as a Catalyst with High Coke Deposition Resistance on Dry Reforming of Methane

“…Especially under low-temperature conditions (<600 °C), the complete decomposition reaction of methane (CH 4 = C(s) + 2H 2 ) and CO disproportionation reaction (2CO = C(s) + CO 2 ) proceed, resulting in significant carbon deposition . Therefore, to solve these problems, many studies have been conducted to control the size of Ni particles, the binding force interaction between Ni and the carrier, and the migration of Ni particles. − In this study, we focused on silicalite-1 zeolite, which has a chemical composition of SiO 2 and MFI-type crystal structure since it has high thermal stability and can induce a strong interaction derived from the zeolite framework. The Ni-containing zeolite was synthesized by the one-pot hydrothermal synthesis method (Ni-silicalite-1 HT), dry gel conversion (Ni-silicalite-1 DGC), and impregnation method (Ni/silicalite-1), and prepared samples were characterized by X-ray diffraction (XRD), energy-dispersive X-ray (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet–visible light (UV-vis), N 2 -adsorption and H 2 temperature-programmed reduction (TPR) measurements.…”

A Triazole‐Based Covalent Gel Loaded with Cu/Pd Bimetallic Nanoparticles for Efficient Catalytic Cross‐Coupling Reactions

“…[21] Compared with homogeneous catalytic reactions which are difficult to separate residue catalysts, heterogeneous catalytic reactions are more environmentally friendly and resourceefficient with easy separation and fast reaction kinetics and mass transfer processes. [22] Various porous materials with specific structures have been used as supports, including carbon material, [23,24] silicon dioxide, [25,26] zeolites, [27,28] MOFs, [29,30] COFs, [31,32] POPs, [33,34] and gels. [35][36][37] Gels possess hierarchical pore structure, providing micropores for anchoring the catalytic center and macropores for efficient mass transfer.…”