Zeolites possessing large specific surface areas, ordered micropores, and adjustable acidity/basicity have emerged as ideal supports to immobilize metal species with small sizes and high dispersities. In recent years, the zeolite-supported metal catalysts have been widely used in diverse catalytic processes, showing excellent activity, superior thermal/hydrothermal stability, and unique shape-selectivity. In this review, a comprehensive summary of the state-of-the-art achievements in catalytic applications of zeolite-supported metal catalysts are presented for important heterogeneous catalytic processes in the last five years, mainly including 1) the hydrogenation reactions (e.g., CO/CO2 hydrogenation, hydrogenation of unsaturated compounds, and hydrogenation of nitrogenous compounds); 2) dehydrogenation reactions (e.g., alkane dehydrogenation and dehydrogenation of chemical hydrogen storage materials); 3) oxidation reactions (e.g., CO oxidation, methane oxidation, and alkene epoxidation); and 4) other reactions (e.g., hydroisomerization reaction and selective catalytic reduction of NOx with ammonia reaction). Finally, some current limitations and future perspectives on the challenge and opportunity for this subject are pointed out. It is believed that this review will inspire more innovative research on the synthesis and catalysis of zeolite-supported metal catalysts and promote their future developments to meet the emerging demands for practical applications.

Advances in Catalytic Applications of Zeolite-Supported Metal Catalysts.

Regulatory pore structure of biomass-based carbon for supercapacitor applications

Mesoporous SiO2 nanostructure: Light-induced adsorption enhancement and its application in photocatalytic degradation of organic dye

Creation of Hierarchical Titanosilicate TS‐1 Zeolites

Oxidative dehydration of glycerol over alternative H,Fe-MCM-22 catalysts: Sustainable production of acrylic acid

Nano-crystalline, hierarchical zeolite Ti-Beta: Hydrothermal synthesis and catalytic performance in alkenes epoxidation reactions

Silica beta synthesized under alkaline conditions

Zeolite Fe-MFI as catalysts in the selective liquid-phase dehydration of 1-phenylethanol

The fabrication of intracrystalline secondary pores is an important approach to improve the catalytic performance of microporous zeolites. Herein, a two-step crystallization process using only TEAOH/TEA has been developed for the hydrothermal synthesis of hierarchical SAPO-34. When crystalline AlPO4 characterized with four-coordinated aluminum and phosphorus atoms was applied, hierarchical SAPO-34 could hydrothermally be synthesized under the nH2O : nAl2O3 > 20 condition, and the crystallization process was analyzed. The crystalline AlPO4 is beneficial for the SAPO-34 synthesis, and hierarchical SAPO-34 with abundant intracrystalline secondary porosity can be efficiently synthesized in 2 h. Although both the distribution range and volume of the mesopores decrease with time, the mesopore volume of hierarchical SAPO-34-31 achieved 0.069 cm3 g−1. Furthermore, the silicon atoms in hierarchical SAPO-34-31 are mainly in the Si(OAl)4 and Si(OSi)(OAl)3 states, and the accessibility would be improved by the intracrystalline mesopores (16–20.3 nm). SAPO-34-31 exhibited more excellent MTO activity than the nano-sized SAPO-34, and the selectivity of ethylene and propylene achieved more than 80%, while the nC2H4 : nC3H6 is always about 0.8.

Jianming Yang

Papers

Nano-crystalline, hierarchical zeolite Ti-Beta: Hydrothermal synthesis and catalytic performance in alkenes epoxidation reactions

Silica beta synthesized under alkaline conditions

Zeolite Fe-MFI as catalysts in the selective liquid-phase dehydration of 1-phenylethanol

The hydrothermal synthesis of hierarchical SAPO-34 with improved MTO performance