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Weng J, Zhu C, Zhao B, Tang W, Lu X, Liu F, Wu M, Ding Y, Gao PX. Enhancing sorption kinetics by oriented and single crystalline array-structured ZSM-5 film on monoliths. Nat Commun 2024; 15:5541. [PMID: 38956044 PMCID: PMC11220059 DOI: 10.1038/s41467-024-49672-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 06/11/2024] [Indexed: 07/04/2024] Open
Abstract
To enhance the reaction kinetics without sacrificing activity in porous materials, one potential solution is to utilize the anisotropic distribution of pores and channels besides enriching active centers at the reactive surfaces. Herein, by designing a unique distribution of oriented pores and single crystalline array structures in the presence of abundant acid sites as demonstrated in the ZSM-5 nanorod arrays grown on monoliths, both enhanced dynamics and improved capacity are exhibited simultaneously in propene capture at low temperature within a short duration. Meanwhile, the ZSM-5 array also helps mitigate the long-chain HCs and coking formation due to the enhanced diffusion of reactants in and reaction products out of the array structures. Further integrating the ZSM-5 array with Co3O4 nanoarray enables comprehensive propene removal throughout a wider temperature range. The array structured film design could offer energy-efficient solutions to overcome both sorption and reaction kinetic restrictions in various solid porous materials for various energy and chemical transformation applications.
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Affiliation(s)
- Junfei Weng
- Department of Materials Science and Engineering & Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Chunxiang Zhu
- Department of Materials Science and Engineering & Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Binchao Zhao
- Department of Materials Science and Engineering & Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Wenxiang Tang
- Department of Materials Science and Engineering & Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Xingxu Lu
- Department of Materials Science and Engineering & Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Fangyuan Liu
- Department of Materials Science and Engineering & Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Mudi Wu
- Department of Materials Science and Engineering & Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Yong Ding
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Pu-Xian Gao
- Department of Materials Science and Engineering & Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA.
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Yu Y, Zhu C, Zhao B, Gao PX, Liu J. Electron Microscopy of Hierarchically Structured Nano-array Catalysts. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2023; 29:124-125. [PMID: 37613348 DOI: 10.1093/micmic/ozad067.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- Yiwei Yu
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, United States
| | - Chunxiang Zhu
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, United States
- Institute of Materials Science, University of Connecticut, Storrs, CT, United States
| | - Binchao Zhao
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, United States
| | - Pu-Xian Gao
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, United States
- Institute of Materials Science, University of Connecticut, Storrs, CT, United States
| | - Jingyue Liu
- Department of Physics, Arizona State University, Tempe, AZ, United States
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Low Heat Capacity 3D Hollow Microarchitected Reactors for Thermal and Fluid Applications. ENERGIES 2022. [DOI: 10.3390/en15114073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lightweight reactor materials that simultaneously possess low heat capacity and large surface area are desirable for various applications such as catalytic supports, heat exchangers, and biological scaffolds. However, they are challenging to satisfy this criterion originating from their structural property in most porous cellular solids. Microlattices have great potential to resolve this issue in directing transport phenomena because of their hierarchically ordered design and controllable geometrical features such as porosity, specific surface, and tortuosity. In this study, we report hollow ceramic microlattices comprising a 10 μm thick hollow nickel oxide beam in an octet-truss architecture with low heat capacity and high specific surface area. Our microarchitected reactors exhibited a low heat capacity for a rapid thermal response with a small Biot number (Bi << 1) and large intertwined surface area for homogeneous flow mixing and chemical reactions, which made them ideal candidates for various energy applications. The hollow ceramic microlattice was fabricated by digital light three-dimensional (3D) printing, composite electroless plating, polymer removal, and subsequent thermal annealing. The transient thermal response and fluidic properties of the 3D-printed microstructures were experimentally investigated using a small-scale thermal and fluid test system, and analytically interpreted using simplified models. Our findings indicate that hollow microarchitected reactors provide a promising platform for developing multifunctional materials for thermal and fluid applications.
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Lu X, Dang Y, Li M, Zhu C, Liu F, Tang W, Weng J, Ruan M, Suib SL, Gao PX. Synergistic promotion of transition metal ion-exchange in TiO 2 nanoarray-based monolithic catalysts for the selective catalytic reduction of NO x with NH 3. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00996j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The improved performance of the multi-component Cu–Ce–Mn/TNA catalysts over the mono-metallic catalysts demonstrated the synergistic promotion of multi-transition-metal-doped nanoarray catalysts for efficient NO abatement.
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Affiliation(s)
- Xingxu Lu
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Yanliu Dang
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Meilin Li
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
| | - Chunxiang Zhu
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Fangyuan Liu
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Wenxiang Tang
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Junfei Weng
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | - Mingyue Ruan
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Steven L. Suib
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
| | - Pu-Xian Gao
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
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Amin KM, Muench F, Kunz U, Ensinger W. 3D NiCo-Layered double Hydroxide@Ni nanotube networks as integrated free-standing electrodes for nonenzymatic glucose sensing. J Colloid Interface Sci 2021; 591:384-395. [PMID: 33631526 DOI: 10.1016/j.jcis.2021.02.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/02/2021] [Accepted: 02/07/2021] [Indexed: 12/29/2022]
Abstract
Nickel cobalt layered double hydroxide (NiCo-LDH)-based materials have recently emerged as catalysts for important electrochemical applications. However, they frequently suffer from low electrical conductivity and agglomeration, which in turn impairs their performance. Herein, we present a catalyst design based on integrated, self-supported nickel nanotube networks (Ni-NTNWs) loaded with NiCo-LDH nanosheets, which represents a binder-free, hierarchically nanostructured electrode architecture combining continuous conduction paths and openly accessible macropores of low tortuosity with an ultrahigh density of active sites. Similar to macroscale metallic foams, the NTNWs serve as three-dimensionally interconnected, robust frameworks for the deposition of active material, but are structured in the submicron range. Our synthesis is solely based on scalable approaches, namely templating with commercial track-etched membranes, electroless plating, and electrodeposition. Morphological and compositional characterization proved the successful decoration of the inner and outer nanotube surfaces with a conformal NiCo-LDH layer. Ni-NTNW electrodes and hydroxide-decorated variants showed excellent performance in glucose sensing. The highest activity was achieved for the catalyst augmented with NiCo-LDH nanosheets, which surpassed the modification with pure Ni(OH)2. Despite its low thickness of 20 µm, the optimized catalyst layer provided an outstanding sensitivity of 4.6 mA mM-1 cm-2, a low detection limit of 0.2 µM, a fast response time of 5.3 s, high selectivity and stability, and two linear ranges covering four orders of magnitude, up to 2.5 mM analyte. As such, derivatized interconnected metal nano-networks represent a promising design paradigm for highly miniaturized yet effective catalyst electrodes and electrochemical sensors.
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Affiliation(s)
- Khaled M Amin
- Department of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany; Department of Polymer Chemistry, Atomic Energy Authority, Cairo 11787, Egypt.
| | - Falk Muench
- Department of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany
| | - Ulrike Kunz
- Department of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany
| | - Wolfgang Ensinger
- Department of Materials Science, Technische Universität Darmstadt, Darmstadt 64287, Germany
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Lu X, Li M, Hoang S, Suib SL, Gao PX. Solvent effects on the heterogeneous growth of TiO2 nanostructure arrays by solvothermal synthesis. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.02.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pauletto G, Vaccari A, Groppi G, Bricaud L, Benito P, Boffito DC, Lercher JA, Patience GS. FeCrAl as a Catalyst Support. Chem Rev 2020; 120:7516-7550. [DOI: 10.1021/acs.chemrev.0c00149] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Gianluca Pauletto
- Chemical Engineering Department, École Polytechnique de Montréal, 2900 Boulevard Édourd-Montpetit, Montréal H3T 1J4, Canada
- Department of Chemistry, Technical University of Munich, 4 Lichtenbergstr, 85747 Garching, Germany
| | - Angelo Vaccari
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 41036 Bologna, Italy
| | - Gianpiero Groppi
- Laboratory of Catalysis and Catalytic Processes, Dipartimento di Energia, Politecnico di Milano, via La Masa 34, 20156 Milano, Italy
| | - Lauriane Bricaud
- Chemical Engineering Department, École Polytechnique de Montréal, 2900 Boulevard Édourd-Montpetit, Montréal H3T 1J4, Canada
- Ecole Nationale Superieure des Mines, 158 Cours Fauriel, 42023 St Etienne, France
| | - Patricia Benito
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale Risorgimento 4, 41036 Bologna, Italy
| | - Daria C. Boffito
- Chemical Engineering Department, École Polytechnique de Montréal, 2900 Boulevard Édourd-Montpetit, Montréal H3T 1J4, Canada
| | - Johannes A. Lercher
- Department of Chemistry, Technical University of Munich, 4 Lichtenbergstr, 85747 Garching, Germany
- Pacific Northwest National Laboratory, Institute for Integrated Catalysis, 902 Battelle Boulevard, Richland, Washington 99352, United States
| | - Gregory S. Patience
- Chemical Engineering Department, École Polytechnique de Montréal, 2900 Boulevard Édourd-Montpetit, Montréal H3T 1J4, Canada
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Lu X, Tang W, Du S, Wen L, Weng J, Ding Y, Willis WS, Suib SL, Gao PX. Ion-Exchange Loading Promoted Stability of Platinum Catalysts Supported on Layered Protonated Titanate-Derived Titania Nanoarrays. ACS APPLIED MATERIALS & INTERFACES 2019; 11:21515-21525. [PMID: 31132239 DOI: 10.1021/acsami.9b04378] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Supported metal catalysts are one of the major classes of heterogeneous catalysts, which demand good stability in both the supports and catalysts. Herein, layered protonated titanate-derived TiO2 (LPT-TiO2) nanowire arrays were synthesized to support platinum catalysts using different loading processes. The Pt ion-exchange loading on pristine LPTs followed by thermal annealing resulted in superior Pt catalysts supported on the LPT-TiO2 nanoarrays with excellent hydrothermal stability and catalytic performance toward CO and NO oxidations as compared to the Pt catalysts through wet-impregnation on the anatase TiO2 (ANT-TiO2) nanoarrays resulted from thermal annealing of LPT nanoarrays. Both loading processes resulted in highly dispersed Pt nanoparticles (NPs) with average sizes smaller than 1 nm at their pristine states. However, after hydrothermal aging at 800 °C for 50 h, highly dispersed Pt NPs were only retained on the ion-exchanged LPT-TiO2 nanoarrays with the support structure consisting of a mixture of 74% anatase and 26% rutile TiO2. For the wet-impregnation loading directly on anatase TiO2 nanoarrays derived from LPT, the Pt catalysts experienced severe agglomeration after hydrothermal aging, with the nanoarray supports consisting of 86% anatase and 14% rutile TiO2. Spectroscopy analysis suggested that Pt2+ cations intercalated into the interlayers of the titanate frameworks through ion-exchange impregnation procedure, which altered the chemical and electronic structures of the catalysts, resulting in the shifts of the electronic binding energy, Raman bands, and optical energy bandgap. The ion-exchangeable nature of LPT nanoarrays clearly provides a structural modification in Pt-doped LPT that has resulted in a strong interaction between the Pt catalysts and LPT-TiO2 nanoarray supports, leading to the enhanced hydrothermal stability of the catalysts. Considering the wide applications of the LPT and TiO2 nanomaterials as supports for catalysts, this finding provides a new pathway to design highly stable supported metal catalysts for different reactions.
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Affiliation(s)
| | | | | | | | | | - Yong Ding
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - William S Willis
- Department of Chemistry , University of Connecticut , Storrs , Connecticut 06269-3060 , United States
| | - Steven L Suib
- Department of Chemistry , University of Connecticut , Storrs , Connecticut 06269-3060 , United States
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Abstract
Combining 1D metal nanotubes and nanowires into cross-linked 2D and 3D architectures represents an attractive design strategy for creating tailored unsupported catalysts. Such materials complement the functionality and high surface area of the nanoscale building blocks with the stability, continuous conduction pathways, efficient mass transfer, and convenient handling of a free-standing, interconnected, open-porous superstructure. This review summarizes synthetic approaches toward metal nano-networks of varying dimensionality, including the assembly of colloidal 1D nanostructures, the buildup of nanofibrous networks by electrospinning, and direct, template-assisted deposition methods. It is outlined how the nanostructure, porosity, network architecture, and composition of such materials can be tuned by the fabrication conditions and additional processing steps. Finally, it is shown how these synthetic tools can be employed for designing and optimizing self-supported metal nano-networks for application in electrocatalysis and related fields.
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Lu X, Hoang S, Tang W, Du S, Wang S, Liu F, Zhong W, Suib SL, Yang G, Zhang FY, Gao PX. Direct Synthesis of Conformal Layered Protonated Titanate Nanoarray Coatings on Various Substrate Surfaces Boosted by Low-Temperature Microwave-Assisted Hydrothermal Synthesis. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35164-35174. [PMID: 30239188 DOI: 10.1021/acsami.8b11801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Layered protonated titanates (LPTs) are promising support materials for catalytic applications because their high surface area and cation exchange capacity provide the possibility of achieving a high metal dispersion. However, the reported LPT nanomaterials are mainly limited to free-standing nanoparticles (NPs) and usually require high temperature and pressure conditions with extended reaction time. In this work, a high-throughput microwave-assisted hydrothermal method was developed for the direct synthesis of conformal LPT nanoarray coatings onto the three-dimensional honeycomb monoliths as well as other substrate surfaces at low temperature (75-95 °C) and pressure (1 atm). Using TiCl3 as the titanium source, H2O2 as the oxidant, and hydrochloric acid as the pH controller, a peroxotitanium complex (PTC) was formed and identified to play an essential role for the formation of LPT nanoarrays. The gaseous O2 released during the decomposition of PTC promotes the mass transfer of the precursors, making this method applicable to substrates with complex geometries. With the optimized conditions, a growth rate of 42 nm/min was achieved on cordierite monolith substrates. When loaded with Pt NPs, the LPT nanoarray-based monolithic catalysts showed excellent low-temperature catalytic activity for CO and hydrocarbon oxidation as well as satisfactory hydrothermal stability and mechanical robustness. The low temperature and pressure requirements of this facile hydrothermal method overcome the size- and pressure-seal restrictions of the reactors, making it feasible for scaled production of LPT nanoarray-based devices for various applications.
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Affiliation(s)
| | | | | | | | | | | | | | - Steven L Suib
- Department of Chemistry , University of Connecticut , Storrs , Connecticut 06269-3060 , United States
| | - Gaoqiang Yang
- Department of Mechanical, Aerospace & Biomedical Engineering, UT Space Institute , University of Tennessee , Knoxville , Tennessee , 37996 , United States
| | - Feng-Yuan Zhang
- Department of Mechanical, Aerospace & Biomedical Engineering, UT Space Institute , University of Tennessee , Knoxville , Tennessee , 37996 , United States
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