Process coupling of CO2 and glycerol comprehensive utilization based on anionic 2D nanomaterial

We developed an approach to realize the comprehensive utilization of CO2 and glycerol by smartly design a nanocatalyst, which concerns the coupling of catalytic reactions and the separation or capture process. Specifically, MgFe-CO32--LDHs with different thickness were fabricated by employing atmospheric CO2 as carbon source and an atomic-level interface was constructed by introducing Pt single atoms to obtain series of Pt/MgFe-LDHs nanocatalysts. During a catalytic assessment, the CO32- confined within interlayer was in situ converted when integrated with glycerol oxidation under irradiation. The optimal nanocatalyst exhibited a decent conversion efficiency of CO32--CO-CH4 and near 100% selectivity of secondary hydroxy group in glycerol. DFT calculation, isotope-labeled experiments and in situ spectrograph characterization revealed possible coupling reaction mechanism. More importantly, the nanocatalyst exhibited impressive reusability for at least six 6 runs. The developed multiple coupling process will be an alternative and promising procedure for the waste and low-valued sources synergetic utilization.