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Articles by Joel E. Schmidt
Disentangling Catalytic Processes of Zeolites within Single Oriented Channels
Communication Bert Marc Weckhuysen Corresponding Author E-mail address: b.m.weckhuysen@uu.nl Utrecht University, Dept. of Inorganic Chemistry and Catalysis, Universiteitsweg 99, 3584 CG Utrecht, NETHERLANDS Search for more papers by this author PDF PDF ShareShare Abstract Establishing structure‐reactivity relationships is vital to developing superior materials for catalysis. It has been well studied in metal‐based catalysts by designing metal nanoparticles with controlled active sites.
Deactivation of Cu‐exchanged Automotive Emissions NH3‐SCR Catalysts Elucidated with Nanoscale Resolution using Scanning Transmission X‐ray Microscopy
Research Article Bert Marc Weckhuysen Corresponding Author E-mail address: b.m.weckhuysen@uu.nl Utrecht University, Dept.
Uniformly Oriented Zeolite ZSM‐5 Membranes with Tunable Wettability on a Porous Ceramic
Facile fabrication of well‐intergrown, oriented zeolite membranes with tunable chemical properties on commercially proven substrates is crucial to broadening their applications for separation and catalysis. Rationally determined electrostatic adsorption can enable the direct attachment of a b‐oriented silicalite‐1 monolayer on a commercial porous ceramic substrate.
Uniformly Oriented Zeolite ZSM‐5 Membranes with Tunable Wettability on a Porous Ceramic
Facile fabrication of well‐intergrown, oriented zeolite membranes with tunable chemical properties on commercially proven substrates is crucial to broadening their applications for separation and catalysis. Rationally determined electrostatic adsorption can enable the direct attachment of a b‐oriented silicalite‐1 monolayer on a commercial porous ceramic substrate.
Nanoscale Chemical Imaging of Zeolites Using Atom Probe Tomography
Understanding structure–composition–property relationships in zeolite‐based materials is critical to engineering improved solid catalysts. However, this can be difficult to realize as even single zeolite crystals can exhibit heterogeneities spanning several orders of magnitude, with consequences for, for example, reactivity, diffusion as well as stability.
Uniformly Oriented Zeolite ZSM‐5 Membranes with Tunable Wettability on a Porous Ceramic
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Isolating Clusters of Light Elements in Molecular Sieves with Atom Probe Tomography
Herein, we have studied seven distinct SAPO-34 samples ( Table 1 ), two of which are prepared withSi isotopically enriched Si to enhance theSi MAS ssNMR signal and simplify Si identification in the APT data analysis. The SAPO-34 phase was confirmed using powder X-ray diffraction ( Figures S1–S4 ). One-dimensionalSi ssNMR spectra suggested that all materials contained Si islands ( section S6, Figures S5–S9 ), surprisingly even those with a low Si content.
Methane-to-methanol conversion over zeolite Cu-SSZ-13, and its comparison with the selective catalytic reduction of NOx with NH3
The direct conversion of methane into methanol is considered as one of the holy grails in hydrocarbon chemistry and recently it was found that small pore zeolites, such as Cu-SSZ-13, Cu-SSZ-16 and Cu-SSZ-39, are active for this process. Here, we propose a reaction mechanism based on spectroscopic evidence for the methane-to-methanol reaction over Cu-SSZ-13 (Si/Al = 20).
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