Special Issue "Hierarchically Porous Catalysts"

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Nanostructured Catalysts".

Deadline for manuscript submissions: 31 December 2022 | Viewed by 1642

Special Issue Editor

Dr. Zhao Wang
E-Mail Website
Guest Editor
1. Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
2. Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, China
Interests: porous hierarchy in materials; nanocatalyst synthesis; supported metal catalysts; heterogenous catalysis; energy conversion

Special Issue Information

Dear Colleagues,

Hierarchically porous catalysts that replicate the complex three-dimentional structures in living organisms have attracted intense attention from both the academic and industrial communities, as their special porous structure allows us to maximize the efficiency of each specific application.

Porous hierarchies enables the enhancement of catalytic performance beyond existing limits. In particular, hierarchically porous structures bring about significant improvents in the catalytic performce of zeolite by upgrading the effective diffusivity of guest moleculars and extending the utilization of active sites. Moreover, they enable the creation of uniformly dispersed active sites with particle sizes ranging from nanometers to single atoms at high metal loading values for supported metal catalysts owing to their large specific area. Additionally, special porus structures also allow the sequential harvesting of solar light for photocatalysis. Therefore, developing hierarchically porous catalysts has become a hot topic that will continue to produce useful results in years to come.

This Special Issue will focus on the use of hierarchically porous catalysts for various heterogeneous reactions. Particular importance will be placed on advanced synthesis methods, enhanced catalytic performances, and the clear identification of structure–function relationships.

We cordially invite you to submit a manuscript for consideration and possible publication in this Special Issue. We hope that this topic is of interest and look forward to hearing from you.

Dr. Zhao Wang
Guest Editor

Manuscript Submission Information

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Keywords

  • hierarchically porous stuctures
  • green synthesis
  • heterogeneous catalysis
  • zeolite
  • supported catalysts
  • photocatalysis

Published Papers (2 papers)

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Research

Article
Interface Synergistic Effect from Hierarchically Porous Cu(OH)2@FCN MOF/CF Nanosheet Arrays Boosting Electrocatalytic Oxygen Evolution
Catalysts 2022, 12(6), 625; https://doi.org/10.3390/catal12060625 - 07 Jun 2022
Cited by 1 | Viewed by 484
Abstract
The electrolysis of water is an efficient and environmentally friendly technology for large-scale hydrogen production. However, the oxygen evolution reaction (OER) involves a multi-electron–proton coupling transfer step that limits the efficiency of water splitting. Therefore, there is an urgent need to develop electrocatalysts [...] Read more.
The electrolysis of water is an efficient and environmentally friendly technology for large-scale hydrogen production. However, the oxygen evolution reaction (OER) involves a multi-electron–proton coupling transfer step that limits the efficiency of water splitting. Therefore, there is an urgent need to develop electrocatalysts with expected activity and stability to accelerate the kinetics of the oxygen evolution reaction. In this paper, hierarchically porous Cu(OH)2@(Fe, Co, Ni)MOF/CF nanosheet (denoted as Cu(OH)2@FCN MOF/CF) arrays were successfully prepared by the hydrothermally induced in situ growth of FCN MOF nanosheets using modified Cu(OH)2 nanowires as carriers; herein, the tuned active species of metal ligands in the FCN MOF composition structure are used as the main catalytic reaction size in the OER. The synergistic effect of a unique porous structure and the active metal-ligand species in the MOF render the catalyst a large electrochemically active surface area and more active species. Then, the active material is fully contacted with the electrolyte to expose more electrochemically active sites, thus greatly improving the electrocatalytic activity and durability of the OER. Specifically, the Cu(OH)2@FCN MOF/CF delivers a minimum overpotential of 290 mV and low Tafel slope of 96.15 mV·dec−1 at 10 mA·cm−2 as well as ultra-long cycling stability. The resulted OER performance is superior to most reported MOF-based electrocatalysts. This novel structural design not only provides a new strategy for the facile preparation of low-cost and high-efficiency OER electrocatalysts but also paves an avenue for the development of other MOF-based composite electrocatalysts with excellent electrocatalytic performances. Full article
(This article belongs to the Special Issue Hierarchically Porous Catalysts)
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Article
Highly Enhanced Catalytic Stability of Copper by the Synergistic Effect of Porous Hierarchy and Alloying for Selective Hydrogenation Reaction
Catalysts 2022, 12(1), 12; https://doi.org/10.3390/catal12010012 - 24 Dec 2021
Viewed by 891
Abstract
Supported copper has a great potential for replacing the commercial palladium-based catalysts in the field of selective alkynes/alkadienes hydrogenation due to its excellent alkene selectivity and relatively high activity. However, fatally, it has a low catalytic stability owing to the rapid oligomerization of [...] Read more.
Supported copper has a great potential for replacing the commercial palladium-based catalysts in the field of selective alkynes/alkadienes hydrogenation due to its excellent alkene selectivity and relatively high activity. However, fatally, it has a low catalytic stability owing to the rapid oligomerization of alkenes on the copper surface. In this study, 2.5 wt% Cu catalysts with various Cu:Zn ratios and supported on hierarchically porous alumina (HA) were designed and synthesized by deposition–precipitation with urea. Macropores (with diameters of 1 μm) and mesopores (with diameters of 3.5 nm) were introduced by the hydrolysis of metal alkoxides. After in situ activation at 350 °C, the catalytic stability of Cu was highly enhanced, with a limited effect on the catalytic activity and alkene selectivity. The time needed for losing 10% butadiene conversion for Cu1Zn3/HA was ~40 h, which is 20 times higher than that found for Cu/HA (~2 h), and 160 times higher than that found for Cu/bulky alumina (0.25 h). It was found that this type of enhancement in catalytic stability was mainly due to the rapid mass transportation in hierarchically porous structure (i.e., four times higher than that in bulky commercial alumina) and the well-dispersed copper active site modified by Zn, with identification by STEM–HAADF coupled with EDX. This study offers a universal way to optimize the catalytic stability of selective hydrogenation reactions. Full article
(This article belongs to the Special Issue Hierarchically Porous Catalysts)
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