Supercages of faujasite (FAU)-type zeolites serve as a robust scaffold for stabilizing dinuclear (Mo2S4) and tetranuclear (Mo4S4) molybdenum sulfide clusters. The FAU-encaged Mo4S4 clusters have a distorted cubane structure similar to the FeMo-cofactor in nitrogenase. Both clusters possess one unpaired electron per Mo atom. Additionally, they show identical catalytic activity per sulfide cluster. Their catalytic activity is stable (> 150 h) for ethene hydrogenation, while layered MoS2 structures deactivate significantly under the same reaction conditions.
Published: May 20, 2021
Citation
Weindl R., R. Khare, L. Kovarik, A. Jentys, K. Reuter, H. Shi, and J.A. Lercher. 2021.Zeolite-stabilized di- and tetranuclear molybdenum sulfide clusters form stable catalytic hydrogenation sites.Angewandte Chemie International Edition 60, no. 17:9301-9305.PNNL-SA-160063.doi:10.1002/anie.202015769