Abstract
Carbon dioxide reforming of methane (CRM) represents a promising method that can effectively convert CH4 and CO2 into valuable energy resources. Herein, ultrathin NixMg1−xO nanoplate catalysts were synthesized using a scalable and facile process involving a one-pot, co-precipitation method in the absence of surfactants. This approach resulted in the synthesis of planar NixMg1−xO catalysts that were much thinner (˂8 nm) with larger specific surface area (>120 m2/g) in comparison to NixMg1−xO catalysts prepared by conventional methods. The ultrathin NixMg1−xO nanoplate catalysts exhibited high thermal stability, catalytic activity, and durability for CRM. Especially, these novel catalysts exhibited excellent anti-coking behavior with a low carbon deposition of 2.1 wt.% after 36 h of continuous reaction compared with the conventional catalysts, under the reaction conditions of the present study. The improved performance of the thin NixMg1−xO nanoplate catalysts was attributed to the high specific surface area and the interaction between metallic nickel nanocatalysts and the solid solution substrates to stabilize the Ni nanoparticles.
Highlights
The most abundant greenhouse gases of carbon dioxide (CO2 ) and methane (CH4 ) reputedly cause the climate change on a global scale
That can be attributed to the lack of sustainable catalysts for Carbon dioxide reforming of methane (CRM), most of which are quickly deactivated by the high temperature stream of CO2 and CH4 [2,3,12]
The X-ray diffraction (XRD) peaks located at 2θ = 37.0◦, 42.9◦, 62.4◦, 74.8◦, and 78.6◦ for all Nix Mg1−x O catalysts were consistent with previous reports [25,26]
Summary
The most abundant greenhouse gases of carbon dioxide (CO2 ) and methane (CH4 ) reputedly cause the climate change on a global scale. Carbon dioxide reforming of methane (CRM) is regarded as the most efficient processes, which can simultaneously convert CO2 and CH4 into hydrogen (H2 ) and carbon monoxide (CO) (known as syngas). Syngas can be widely used for chemical synthesis in many industrial applications as fuel or an intermediate. An optimal ratio of ~1:1 H2 :CO in the CRM reaction is most optimal for downstream synthesis to convert syngas into useful chemicals by subsequent reactions, such as Fisher–Tropsch reactions and oxosynthesis [3,4,5,6,7,8,9,10,11]. That can be attributed to the lack of sustainable catalysts for CRM, most of which are quickly deactivated by the high temperature stream of CO2 and CH4 [2,3,12]
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