Abstract
Dry reforming of methane (DRM) reaction has drawn much interest due to the reduction of greenhouse gases and production of syngas. Coking and sintering have hindered the large-scale operations of Ni-based catalysts in DRM reactions at high temperatures. Smart designs of Ni-based catalysts are comprehensively summarized in fourth aspects: surface regulation, oxygen defects, interfacial engineering, and structural optimization. In each part, details of the designs and anti-deactivation mechanisms are elucidated, followed by a summary of the main points and the recommended strategies to improve the catalytic performance, energy efficiency, and utilization rate.
Highlights
Therein, dry reforming of methane (DRM) reaction draws much interest because it contributes to the reduction of greenhouse gases (CO2 and CH4) and generates a mixture of CO and H2, which can be used as fuels and further converted to high value-added petrochemicals [26,27,28,29,30,31]
Researchers have reviewed the progress of Ni-based catalysts for DRM reaction in terms of the metal doping, porous supports, and kinetics/mechanisms, which shows the high importance of and widespread attention paid towards the DRM reaction [26,27,28,29,30,31]
We summarize the recent advances of Ni-based catalysts’ modifications and corresponding catalytic performances for DRM reaction
Summary
Many studies have been focused on the conversion of CO2 and CH4 (two greenhouse gases) to value-added chemicals or petrochemicals in various processes, such as reforming of methane [1,2,3,4,5,6,7,8], CO2 methanation [9,10,11,12,13,14,15,16], membrane-assisted reaction [17,18,19,20,21], chemical looping [22], reversed water-gas-shift [23,24], and catalytic decomposition [25]. Therein, dry reforming of methane (DRM) reaction draws much interest because it contributes to the reduction of greenhouse gases (CO2 and CH4) and generates a mixture of CO and H2 (syngas), which can be used as fuels and further converted to high value-added petrochemicals [26,27,28,29,30,31]. Ni-based catalysts have been widely studied due to their low cost and good activities, but carbon deposition, metal sintering, and surface oxidation lead to the deactivation of catalysts and impede their further applications [30]. Solutions have been provided to address this issue, including the size control of active metals, doping second transition element, adding alkali earth or rare earth promoters to the support, tuning metal-support interaction (MSI), structure designs and optimization of reaction parameters [26,27,28,29,30,31]. The following parts consist of surface regulation, oxygen defects, interfacial engineering, and structural optimization, followed by concluding remarks and prospects
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