Zeolite‐Stabilized Di‐ and Tetranuclear Molybdenum Sulfide Clusters Form Stable Catalytic Hydrogenation Sites. (17th March 2021)

• Record Type: Journal Article
• Authors: Weindl, Roland; Khare, Rachit; Kovarik, Libor; Jentys, Andreas; Reuter, Karsten; Shi, Hui; Lercher, Johannes A.
• Is Part Of: Angewandte Chemie. Volume 133:Number 17(2021)
• Page Start: 9387
• Page End: 9391
• Publication Date: 2021-03-17
• Subjects: EPR spectroscopy -- hydrogenation -- molybdenum sulfide clusters -- transition metal sulfides -- zeolites; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202015769
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Supercages of faujasite (FAU)‐type zeolites serve as a robust scaffold for stabilizing dinuclear (Mo2 S4 ) and tetranuclear (Mo4 S4 ) molybdenum sulfide clusters. The FAU‐encaged Mo4 S4 clusters have a distorted cubane structure similar to the FeMo‐cofactor in nitrogenase. Both clusters possess unpaired electrons on Mo atoms. 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. Abstract : Dinuclear (Mo2 S4 ) and tetranuclear (Mo4 S4 ) molybdenum sulfide clusters were synthesized within the supercages of a faujasite zeolite. Encaged Mo4 S4 clusters possess a structure similar to the nitrogenase enzyme's FeMo‐cofactor; both contain unpaired electrons and show identical catalytic activity per cluster. Their activity for ethene hydrogenation is stable, while layered MoS2 deactivates significantly under the same conditions.