Journal ArticleDOI
Hierarchical Zeolites-confined Metal Catalysts and Their Enhanced Catalytic Performances.
Li Chengyang,Peng Sun,Fuwei Li +2 more
Reads0
Chats0
TLDR
In this paper, the authors classify five metals-hierarchical zeolites composite according to the location of metals on hierarchical structure, including metals located on micropores, intercrystalline mesopores, intracrystalline meshes, hollow nanobox and mesoporous shells, highlighting the rational design of catalyst preparation, improved catalytic efficiency and stability of metal species.Abstract:
The confinement of metal species within hierarchical zeolites combines the acidic/basic sites of zeolites, the enhanced mass transfer of mesoporous system, and the inside active metal sites, leading to high activity, unique selectivity, and superior stability in chemicals synthesis, energy and environment catalysis. To date, review on this emerging topic is rarely reported. Herein, we classify five metals-hierarchical zeolites composite (metal@hierarchical zeolites) according to the location of metals on hierarchical structure, including metals located on micropores, intercrystalline mesopores, intracrystalline mesopores, hollow nanobox and mesoporous shells. The synthesis and catalysis applications of metal@hierarchical zeolites composite are provided, highlighting the rational design of catalyst preparation, the improved catalytic efficiency and stability of metal species. Finally, we discuss the current limitations and future opportunities for this emerging field. This Review is expected to inspire more developments and applications of metal@hierarchical zeolites.read more
Citations
More filters
Journal ArticleDOI
Dynamics-driven Tailoring of Sub-nanometric Pt-Ni Bimetals Confined in Hierarchical Zeolite for Catalytic Hydrodeoxygenation
TL;DR: In this paper , highly stable sub-nanoscale Pt-Ni bimetals confined in a hierarchical ZSM-5 zeolite (ZSM5) framework are constructed.
Journal ArticleDOI
Uniform Ni species encapsulated in nanocrystalline ZSM–5 with enhanced catalytic performance for upgrading of fatty acids
TL;DR: In this article , a hierarchical ZSM-5 zeolite supporting Ni catalyst was used for upgrading of fatty acids under H2 atmosphere, which improved the cold flow properties of the upgraded oil.
Journal ArticleDOI
Selective Production of Petrochemicals through Reactions in Confined Space of Zeolites
Sumeet K. Sharma,Raksh V. Jasra +1 more
TL;DR: In this article , fine tuning of acidic properties and porosity of zeolites on the activity of catalyst and selectivity to desired product for alkylation, trans-alkylation, isomerization reactions, and production of olefins from methanol and syngas are discussed in details.
Journal ArticleDOI
Synthesis of high-density bio-jet fuel by one-pot Mannich-Michael reaction and subsequent hydrodeoxygenation over alkali-treated zeolite catalysts
Qixiang Kang,Xinghua Zhang,Yanyan Cui,Xuelai Zhao,Wuyu Wang,Jiapeng Zhang,Qi Zhang,Longlong Ma +7 more
TL;DR: In this paper , the one-pot Mannich-Michael reaction of cyclopentanone and formaldehyde followed by hydrodeoxygenation is a prospective route for the synthesis of cyclic high-density jet fuel.
References
More filters
Journal ArticleDOI
Stable single-unit-cell nanosheets of zeolite MFI as active and long-lived catalysts
Minkee Choi,Kyungsu Na,Jeongnam Kim,Jeongnam Kim,Yasuhiro Sakamoto,Yasuhiro Sakamoto,Osamu Terasaki,Osamu Terasaki,Ryong Ryoo,Ryong Ryoo +9 more
TL;DR: It is shown that appropriately designed bifunctional surfactants can direct the formation of zeolite structures on the mesoporous and microporous length scales simultaneously and thus yield MFI (ZSM-5, one of the most important catalysts in the petrochemical industry) zeolites that are only 2 nm thick, which corresponds to the b-axis dimension of a single MFI unit cell.
Journal ArticleDOI
Imparting functionality to a metal–organic framework material by controlled nanoparticle encapsulation
Guang Lu,Shaozhou Li,Zhen Guo,Omar K. Farha,Brad G. Hauser,Xiaoying Qi,Yi Wang,Xin Wang,Sanyang Han,Xiaogang Liu,Xiaogang Liu,Joseph S. DuChene,Hua Zhang,Qichun Zhang,Xiaodong Chen,Jan Ma,Say Chye Joachim Loo,Wei David Wei,Yanhui Yang,Joseph T. Hupp,Fengwei Huo +20 more
TL;DR: A controlled encapsulation strategy is reported that enables surfactant-capped nanostructured objects of various sizes, shapes and compositions to be enshrouded by a zeolitic imidazolate framework (ZIF-8).
Journal ArticleDOI
Hierarchical zeolites: enhanced utilisation of microporous crystals in catalysis by advances in materials design.
Javier Pérez-Ramírez,Claus H. Christensen,Kresten Egeblad,Christina Hviid Christensen,Johan C. Groen +4 more
TL;DR: This critical review examines recent advances in the rapidly evolving area of zeolite with improved accessibility and molecular transport and particularly dwells on the exciting field of hierarchical zeolites, which couple in a single material the catalytic power of micropores and the facilitated access and improved transport consequence of a complementary mesopore network.
Journal ArticleDOI
Applications of hierarchically structured porous materials from energy storage and conversion, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine
Ming-Hui Sun,Shaozhuan Huang,Li-Hua Chen,Yu Li,Xiao-Yu Yang,Zhong-Yong Yuan,Bao-Lian Su,Bao-Lian Su,Bao-Lian Su +8 more
TL;DR: Recent progress in the applications of hierarchically structured porous materials from energy conversion and storage, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine is reviewed and could stimulate researchers to synthesize new advanced hierarchically porous solids.
Journal ArticleDOI
Enhanced Electron Penetration through an Ultrathin Graphene Layer for Highly Efficient Catalysis of the Hydrogen Evolution Reaction
TL;DR: Density functional theory (DFT) calculations indicate that the ultrathin graphene shells strongly promote electron penetration from the CoNi nanoalloy to the graphene surface, which results in superior HER activity on the graphene shells.