The homogeneous system persists for three cycles and four hours in total before losing its ability to fully reduce C2H2 in an industrially relevant mixture. In contrast, ZrCo-MOF can be recycled up to six times, and remains catalytically active for 48 hours before significant loss of performance (Figure ). PXRD patterns collected periodically over the course of the reaction demonstrate retention of crystallinity, even after 48 hours of irradiation (Figure ). Similarly, SEM images taken at various time points indicate retention of particle morphology (Figure ). Furthermore, elemental analysis of the MOF powder after photocatalysis indicates that only a small amount of after 24 hours of catalysis indicating that only 10.4 ± 1.6% of cobalt in the original ZrCo-MOF leaches in that time. We therefore speculate that the reason catalysis ceases is due to pore clogging with other reaction components over time.