Assessment of metal-metal interactions and catalytic behavior in platinum-tin bimetallic subnanometric clusters by using reactive characterizations

Catalytic limitations on alkane dehydrogenation under H2deficient conditions relevant to membrane reactors

“…In this work, a platinum-tin-potassium catalyst supported on all-silica MFI, PtSn-K/MFI, that has been previously reported to be a highly active, selective, and stable propane dehydrogenation catalyst was used for ethane dehydrogenation catalysis. [27][28][29] The material consists of sub-nanometric PtSn clusters, which were stable when cycled through reducing and oxidizing conditions. The small particles give optimal atom economy, 30,31 and their stability under oxidizing conditions may allow the material to be regenerated multiple times after it inevitably is deactivated by coke that is produced during catalytic dehydrogenation.…”

The Interplay between Process Conceptualization and Experimental Research─Accelerating and Guiding Catalysis to Process Breakthroughs

“…Higher methane selectivity and fast deactivation are hallmarks of changes in the active site structure, and likely a change in the interaction between Pt and Sn, with less Sn interaction. 16 These results motivate the design of bimetallic PtSn catalysts that are stable under cycling EDH (at 600 °C) and oxidative conditions necessary for oxidative regeneration.…”

“…After returning to EDH, conversion returns to the thermodynamic limit; however, catalyst deactivation has changed from the fresh catalyst, and initial selectivity to methane is noticeably higher immediately after regeneration. Higher methane selectivity and fast deactivation are hallmarks of changes in the active site structure, and likely a change in the interaction between Pt and Sn, with less Sn interaction . These results motivate the design of bimetallic PtSn catalysts that are stable under cycling EDH (at 600 °C) and oxidative conditions necessary for oxidative regeneration.…”

Advanced design and development of catalysts in propane dehydrogenation

“…Sattler and coworkers evaluated the interaction between metallic Pt and Sn together with catalytic properties according to the related reaction activity characterization. 58 It demonstrated that bimetallic Pt–Sn sub-nanoclusters could achieve better catalytic performance when used with an increased pre-reduced time in H 2 . The improvement of bimetallic Pt–Sn interactions can be attributed to the regulated adsorption of light hydrocarbon and intermediates, thus further preventing the formation of by-products and coke.…”