Recent advances in zeolite-encapsulated metal catalysts: A suitable catalyst design for catalytic biomass conversion

Promotion Effect of the X-Zeolite Host on Encapsulated Platinum Clusters for Selective Hydrogenation of Phenylacetylene to Styrene

“…The geometry or electronic state properties of metal clusters or nanoparticles can be modulated by the zeolitic microenvironment. − Through the fine modulation of the zeolitic environment surrounding the encapsulated metal clusters or nanoparticles, their catalytic activity can be upgraded to a high value to some extent. , In addition to the influence of the zeolitic microenvironment on the activity of active metal species, the product selectivity during the catalytic process is highly relevant to the intimate zeolitic environment, which controls the adsorption trend of reactants or the desorption of the products. , Hence, the introduction of the Pt species into the microporosity of zeolite might lead to a catalyst for phenylacetylene selective hydrogenation to styrene with exceptional catalytic performance . Meanwhile, systematically understanding the function of the zeolitic inner cavity on the performance of the encapsulated active metal species in the phenylacetylene selective hydrogenation to styrene is also of great significance for the development of such a catalyst in the future.…”

A survey of recent progress on novel catalytic materials with precise crystalline structures for oxidation/hydrogenation of key biomass platform chemicals

“…The advancement in synthesis methods and characterization technologies has promoted the design of supported metal catalysts, focusing on alloy, micro-structure, or hybrid composites, functionalized supports with suitable microstructure or strong interaction, and quite a number of other novel structural catalytic materials. [17][18][19][20][21][22] Herein, we mainly concentrate upon the novel structural catalytic materials with precise crystalline structures, including porous materials (zeolites, MOFs, and COFs), and cluster materials (POMs and metal nanoclusters).…”

“…The LSV data showed that the Ni 18 had superior stability after 5000 cycles in 0.1 M KOH with 5 mM GLU. Noting that the current density (J) was enhanced with the increasing of test cycles (>5000), that is, J 20000th > J 15000th > J 10000th ≈ J 5000th , which was caused by the electrochemical activation of Ni 18 . In addition, it was unrelated to the atmosphere containing N 2 , air, or O 2 , indicating that calixarene-based {Ni 18 } nanoclusters had a great potential in the compartmentless GLU À air fuel cell.…”

“…Noting that the current density (J) was enhanced with the increasing of test cycles (>5000), that is, J 20000th > J 15000th > J 10000th ≈ J 5000th , which was caused by the electrochemical activation of Ni 18 . In addition, it was unrelated to the atmosphere containing N 2 , air, or O 2 , indicating that calixarene-based {Ni 18 } nanoclusters had a great potential in the compartmentless GLU À air fuel cell. 59 Recently, Ziolek et al found that Au/SBA-15 gave rise to a high gluconic acid selectivity with nearly full GLU conversion under the base-free condition.…”

Pd/Lewis Acid Synergy in Macroporous Pd@Na‐ZSM‐5 for Enhancing Selective Conversion of Biomass

“…Confinement of Pd nanometal in a zeolite matrix is a promising way to a catalyst design that shows significant synergy by combination of well‐defined acid sites, shape selectivity, and outstanding stability [7–10] . Zeolite‐confined Pd show unique cascade effects on a molecular scale, and thus enables spatially confined catalysis similar to enzyme catalysis [11–14] . The acid sites play a key role in sustainable production of biofuels, such as adsorption promotion of reactants [1,9] and electronically influence of Pd [15] .…”