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Listar por autor "Li, Chengeng"

Mostrando ítems 1-11 de 11

Approaching enzymatic catalysis with zeolites or how to select one reaction mechanism competing with others

Ferri-Vicedo, Pau; Li, Chengeng; Schwalbe-Koda, Daniel; Xie, Mingrou; Moliner Marin, Manuel; Gomez-Bombarelli, Rafael; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (Nature Publishing Group, 2023-05-19)

[EN] Approaching the level of molecular recognition of enzymes with solid catalysts is a challenging goal, achieved in this work for the competing transalkylation and disproportionation of diethylbenzene catalyzed by acid ...
Building zeolites from precrystallized units: nanoscale architecture

Li, Chengeng; Moliner Marin, Manuel; Corma Canós, Avelino (John Wiley & Sons, 2018-11-19)

[EN] Since the early reports by Barrer in the 1940s on converting natural minerals into synthetic zeolites, the use of precrystallized zeolites as crucial inorganic directing agents to synthesize other crystalline zeolites ...
Chemical and Structural Parameter Connecting Cavity Architecture, Confined Hydrocarbon Pool Species, and MTO Product Selectivity in Small-Pore Cage-Based Zeolites

Ferri-Vicedo, Pau; Li, Chengeng; Paris, Cecilia; Vidal Moya, José Alejandro; Moliner Marin, Manuel; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (American Chemical Society, 2019-12-06)

[EN] The catalysts used in the methanol-to-olefins (MTO) reaction are considered dual systems comprising an inorganic zeolite framework and organic compounds hosted inside that act as cocatalysts. The influence of zeolite ...
Design and Synthesis of the Active Site Environment in Zeolite Catalysts for Selectively Manipulating Mechanistic Pathways

Li, Chengeng; Ferri-Vicedo, Pau; Paris, Cecilia; Moliner Marin, Manuel; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (American Chemical Society, 2021-07-21)

[EN] By combining kinetics and theoretical calculations, we show here the benefits of going beyond the concept of static localized and defined active sites on solid catalysts, into a system that globally and dynamically ...
Impact of Zeolite Framework Composition and Flexibility on Methanol-To-Olefins Selectivity: Confinement or Diffusion?

Ferri-Vicedo, Pau; Li, Chengeng; Millán-Cabrera, Reisel; Martínez-Triguero, Joaquín; Moliner Marin, Manuel; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (John Wiley & Sons, 2020-10-26)

[EN] The methanol-to-olefins reaction catalyzed by small-pore cage-based acid zeolites and zeotypes produces a mixture of short chain olefins, whose selectivity to ethene, propene and butene varies with the cavity architecture ...
Making Nanosized CHA Zeolites with Controlled Al Distribution for Optimizing Methanol-to-Olefin Performance

Gallego-Sánchez, Eva María; Li, Chengeng; Paris, Cecilia; Martín-García, Nuria; Martínez-Triguero, Joaquín; Boronat Zaragoza, Mercedes; Moliner Marin, Manuel; Corma Canós, Avelino (John Wiley & Sons, 2018-10-01)

[EN] From theoretical calculations and a rational synthesis methodology, it has been possible to prepare nanocrystalline (60-80 nm) chabazite with an optimized framework Al distribution that has a positive impact on its ...
Rationalize the synthesis of zeolite catalysts by understanding reaction mechanism

Li, Chengeng (Universitat Politècnica de València, 2020-06-29)

[EN] The present thesis focuses on the rationalization of the zeolite synthesis for catalysis by understanding the nature of active sites and their microenvironments, together with their influence on the mechanisms of ...
Regioselective generation and reactivity control of subnanometric platinum clusters in zeolites for high-temperature catalysis

Liu, Lichen; Lopez-Haro, Miguel; Lopes, Christian W.; Li, Chengeng; Concepción Heydorn, Patricia; Simonelli, Laura; Calvino, Jose J.; Corma Canós, Avelino (Nature Publishing Group, 2019-08)

[EN] Subnanometric metal species (single atoms and clusters) have been demonstrated to be unique compared with their nanoparticulate counterparts. However, the poor stabilization of subnanometric metal species towards ...
Selective Introduction of Acid Sites in Different Confined Positions in ZSM-5 and Its Catalytic Implications

Li, Chengeng; Vidal Moya, José Alejandro; Miguel, Pablo J.; Dedecek, Jiri; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (American Chemical Society, 2018-08)

[EN] Controlling the location of acid sites in zeolites can have a great effect on catalysis. In this work we face the objective of directing the location of AI into the 10R channels of ZSM-5 by taking advantage of the ...
Synthesis of reaction-adapted zeolites as methanol-to-olefins catalysts with mimics of reaction intermediates as organic structure-directing agents

Li, Chengeng; Paris, Cecilia; Martínez-Triguero, Joaquín; Boronat Zaragoza, Mercedes; Moliner Marin, Manuel; Corma Canós, Avelino (Nature Publishing Group, 2018)

[EN] Catalysis with enzymes and zeolites have in common the presence of well-defined single active sites and pockets/cavities where the reaction transition states can be stabilized by longer-range interactions. We show ...
The Limits of the Confinement Effect Associated to Cage Topology on the Control of the MTO Selectivity

Ferri-Vicedo, Pau; Li, Chengeng; Paris, Cecilia; Rodríguez-Fernández, Aida; Moliner Marin, Manuel; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (John Wiley & Sons, 2021-03-19)

[EN] The light olefin product distribution of the methanol-to-olefin (MTO) reaction catalyzed by acid zeolites and zeotypes depends on the nature of the entrapped hydrocarbon pool species that act as co-catalysts. The ...