Controllable synthesis of xPt–yNiO/MgO–PWAC nanoparticles and high-efficiency conversion for CO2/CH4 reforming reaction

Abstract

Utilization and conversion of CO2 through dry reforming of methane to syngas have attracted very great attention because of china's action plans of carbon neutrality to cut net CO2 emissions to peak by 2030. Hence, we designed/prepared a series of high-performance xPt–yNiO/MgO–PWAC (Persimmon Wood-derived Activated Carbon) nanoparticle catalysts via polyol technique. Its catalytic performance and stability were evaluated for CO2/CH4 reforming reaction at 700–800 °C. The experimental results demonstrated that initial conversions of CO2 and CH4 over 1.5Pt11NiO/MgO–PWAC catalysts were 96% and 95.3%, respectively, higher than those observed over 11NiO/MgO–PWAC due to a fact the appreciate Pt loadings will significantly improve the dispersion of Ni/Pt nanoparticles and suppress the formation of coke on the active sites of nickel nanoparticles effectively. The results of HRTEM, TG–DSC XRD, CO2-TPD, and XPS studies revealed that high catalytic performance of catalyst correlated closely with the size and dispersion of metal nanoparticles, the preferred properties of CO2 adsorption as well as low carbon deposition on the interface between active Ni sites/MgO-PWAC supports.