Revealing the structure-activity relationship of two Cu-porphyrin-based metal-organic frameworks for the electrochemical CO-to-HCOOH transformation.

The eCO2RR activity is correlated to the internal structural character of the catalyst. We employed two types of structural models of porphyrin-based MOFs of PCN-222(Cu) and PCN-224(Cu) into heterogeneous catalysis to illustrate the effect of structural factors on the eCO2RR performance. The composite catalyst PCN-222(Cu)/C displays better activity and selectivity (η = 450 mV, FEHCOOH = 44.

Acquiring an effective CaO-based CO sorbent and achieving selective methanation of CO.

CO capture, utilization, and storage are promising strategies to solving the problems of superfluous CO or energy shortage. Here, mechanochemical reduction of CO by a MgH/CaH mixture was first performed, by which we achieve selective methanation of CO and acquire an effective CaO-based CO sorbent, simultaneously. The selectivity of methanation is near 100% and the yield of CH reaches 30%.