Order-of-magnitude increase in rate of methane dry reforming over Ni/CeO2-SiC catalysts by microwave catalysis

Anchoring highly dispersed metal nanoparticles by strong electrostatic adsorption (SEA) on a dealuminated beta zeolite for catalysis

“…2a) verifies the presence of highly dispersed Ni NPs in Ni–Cl@deAl-beta-SEA. The characteristic diffraction peaks of metallic Ni phases (at 2 θ = 44.7, 51.9 and 76.6°, 37 JCPDS No. 01-070-0989) were insignificant in the XRD pattern of Ni–Cl@deAl-beta-SEA despite the relatively high ∼8 wt% Ni loading detected by ICP (Table S1†).…”

Review and Outlook of Confined Ni Catalysts for the Dry Reforming of Methane Reaction

“…For example, the surface temperature of the catalyst would be enhanced by microwave irradiation, leading to a promoted DRM rate and less carbon deposition under microwave catalysis. 16 The activation energy of DRM was considerably decreased under photothermal catalysis, enhancing the performance of DRM. 133 In these senses, DRM under other energetic fields can be considered for the DRM study.…”

“…are developed for DRM. − However, DRM is endothermic, which means that it can only occur at high temperatures. Under the condition, Ni nanoparticles tend to be sintered by Ostwald ripening and carbon is favored to be deposited by methane cracking. − …”

Photothermal Methane Dry Reforming Catalyzed by Multifunctional (Ni–Cu/CeO2)@SiO2 Catalyst

“…Methane dry reforming (MDR, CH 4 (g) + CO 2 (g) → 2CO­(g) + 2H 2 (g), Δ H 298 = +247 kJ/mol) converts greenhouse gases and produces energy chemical syngas, which is a great support for carbon neutrality. In the last decades, thermal MDR was extensively investigated, focusing on Ni-based catalysts. − However, Ni sintering and carbon deposition deteriorate MDR stability because of Ostwald ripening of Ni nanoparticles and decomposition of CH 4 at high temperatures. Besides, the reverse water gas shift reaction (CO 2 + H 2 → CO + H 2 O) increases the CO 2 conversion but decreases H 2 production, leading to a H 2 /CO ratio below 1 and losing the more energetic H atoms.…”