Abstract
There is a need to design substrate-supported catalysts for the heterogeneous fields, especially with large porosity, which can facilitate mass transport. Herein, aiming at enhancing the performance of CO2 fixation, a hollow carbon sphere-supported catalyst of FeNPs/HCS (FeNPs, Fe nanoparticles; HCS, hollow carbon sphere) is facilely designed and fabricated. Excitingly, the experimental and calculation results reveal that FeNPs/HCS displays an ultrahigh activity with almost complete conversions in CO2 cycloaddition, surpassing the performance of FeNPs/CS (CS, carbon sphere); this demonstrates that the HCS plays a key role, which may be attributed to the hollow structure tuning the electron density and enhancing the enrichment of the substrate and CO2, consequently lowering the barrier associated with mass transfer. The work not only provides a novel strategy to construct an efficient catalyst but also proposes, for the first time, an electron redistribution tactic to influence the catalytic process for CO2 cycloaddition.
Published Version
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