Cu-ZnO@Al2O3 hybrid nanoparticle with enhanced activity for catalytic CO2 conversion to methanol

Hoang, Thanh Truc Nguyen; Lin, Yu‐Shih; Le, Thi Nhu Huynh; Lê, Tiến Khoa; Huỳnh, Thị Kiều Xuân; Tsai, De‐Hao

doi:10.1016/j.apt.2021.03.034

Cited by 20 publications

(14 citation statements)

References 44 publications

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“…29−31 Several works in the literature have proposed that synergistic catalytic CO 2 hydrogenation occurs at the interface between Cu and ZnO; thus, the existence of the Cu−ZnO interfacial site is crucial for methanol production. 29,30,32 In a typical catalytic CO 2 hydrogenation process (Scheme 2c), Cu acted as the active metal for the activation of H 2 , while ZnO promoted the catalysis process by providing basic sites for CO 2 adsorption and subsequent activation. 30 During the catalytic process, the active hydrogen species on the surface of Cu spill over to react with the adsorbed CO 2 to form methanol at the Cu−ZnO interface.…”

Section: Using Aerosol Phase-synthesized Nanoparticlesmentioning

confidence: 99%

“…29,30,32 In a typical catalytic CO 2 hydrogenation process (Scheme 2c), Cu acted as the active metal for the activation of H 2 , while ZnO promoted the catalysis process by providing basic sites for CO 2 adsorption and subsequent activation. 30 During the catalytic process, the active hydrogen species on the surface of Cu spill over to react with the adsorbed CO 2 to form methanol at the Cu−ZnO interface. 30 In this regard, several approaches were taken to modify the Cu−ZnO-based catalyst, such as the incorporation of promoter or catalyst support.…”

Section: Using Aerosol Phase-synthesized Nanoparticlesmentioning

confidence: 99%

“…30 During the catalytic process, the active hydrogen species on the surface of Cu spill over to react with the adsorbed CO 2 to form methanol at the Cu−ZnO interface. 30 In this regard, several approaches were taken to modify the Cu−ZnO-based catalyst, such as the incorporation of promoter or catalyst support. Zhu et al employed flame spray pyrolysis to fabricate Cu−ZnO−CeO 2 to enhance methanol selectivity in the CO 2 hydrogenation reaction.…”

Section: Using Aerosol Phase-synthesized Nanoparticlesmentioning

confidence: 99%

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Design of Aerosol Nanoparticles for Interfacial Catalysis

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Tsai

2022

Langmuir

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Interest in multifunctional nanoparticles is currently rising due to the increasing demand in green energy and environmental applications. The aerosol-based synthetic route emerges as a promising method for enabling the fabrication of multifunctional nanoparticles in a continuous and scalable manner. Meanwhile, interfacial catalysis is receiving great attention to enhance the performance of chemical reactions. In this regard, the utilization of aerosol nanoparticles is highly beneficial to the catalysis field by the creation of strong metal−support−promoter interactions for promoting interfacial catalysis. In this Perspective, aerosol-based synthesis of hybrid nanoparticles is briefly discussed. In addition, the interfacial catalysis of CO oxidation, methane combustion, CO 2 hydrogenation, and dry reforming of methane are discussed to provide fundamental insights and concepts for the rational design of nanocatalysts with efficient interfaces.

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Section: Using Aerosol Phase-synthesized Nanoparticlesmentioning

confidence: 99%

Section: Using Aerosol Phase-synthesized Nanoparticlesmentioning

confidence: 99%

Section: Using Aerosol Phase-synthesized Nanoparticlesmentioning

confidence: 99%

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Design of Aerosol Nanoparticles for Interfacial Catalysis

Law

Tsai

2022

Langmuir

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“…Metallic nanoparticles such as gold MNPs [170], iron [171], and silver [172] have been synthesized, characterized and investigated in several applications, and it has been demonstrated that these materials have very interesting surface, optical and electronic properties. Many types of nanostructured metal oxides, as TiO 2 [173], Fe 2 O 3 [174], Al 2 O 3 [175], ZnO [176], SiO 2 [177], MnO 2 [178], and binary metal oxides [179] were investigated for different applications, demonstrating high potential due to the unique properties offered by nanomaterials. The main characteristics of MNPs are their large surface area, large surface energies, transition between molecular and metallic states providing specific electronic structures (local density of states-LDOS), plasmon excitation, quantum confinement, increased number of kinks, a large number of low-coordination sites such as corners and edges, a large number of dangling bonds and, consequently, specific and chemical properties and the ability to store excess electrons [180].…”

Section: Metallic Nanoparticles and Nanostructured Metal Oxidesmentioning

confidence: 99%

Conversion of Plastic Waste into Supports for Nanostructured Heterogeneous Catalysts: Application in Environmental Remediation

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Plastics are ubiquitous in our society and are used in many industries, such as packaging, electronics, the automotive industry, and medical and health sectors, and plastic waste is among the types of waste of higher environmental concern. The increase in the amount of plastic waste produced daily has increased environmental problems, such as pollution by micro-plastics, contamination of the food chain, biodiversity degradation and economic losses. The selective and efficient conversion of plastic waste for applications in environmental remediation, such as by obtaining composites, is a strategy of the scientific community for the recovery of plastic waste. The development of polymeric supports for efficient, sustainable, and low-cost heterogeneous catalysts for the treatment of organic/inorganic contaminants is highly desirable yet still a great challenge; this will be the main focus of this work. Common commercial polymers, like polystyrene, polypropylene, polyethylene therephthalate, polyethylene and polyvinyl chloride, are addressed herein, as are their main physicochemical properties, such as molecular mass, degree of crystallinity and others. Additionally, we discuss the environmental and health risks of plastic debris and the main recycling technologies as well as their issues and environmental impact. The use of nanomaterials raises concerns about toxicity and reinforces the need to apply supports; this means that the recycling of plastics in this way may tackle two issues. Finally, we dissert about the advances in turning plastic waste into support for nanocatalysts for environmental remediation, mainly metal and metal oxide nanoparticles.

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“…The composite solid-based catalysts were prepared through a modified sol−gel-based coprecipitation approach. 35,36 First, the precursors of Ca, Mg and Al with desired mass ratios were dissolved and/or dispersed in DI water. The homogeneously mixed solution of precursors was added dropwise to the KOH (precipitant) aqueous solution at pH 13.6 under constant stirring.…”

Section: ■ Introductionmentioning

confidence: 99%

Sustainable Synthesis of Epoxides from Halohydrin Cyclization by Composite Solid-Based Catalysts

Chang

Chen

Tsai

et al. 2022

Ind. Eng. Chem. Res.

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A facile synthesis of CaO- and MgO-based composite solid-based catalysts is demonstrated for a sustainable synthesis of epoxides from halohydrin cyclization (i.e., via heterogeneous catalysis). The cyclodehydrohalogenation of 3-chloro-1,2-propanediol (3-MCH) to glycidol (GLD) was chosen as the representative of the study. The activity, selectivity, and operation stability of the developed composite catalysts versus their material properties were studied through the establishment of a suitable synthesis, characterization, and performance testing platform. An X-ray diffractometer, a scanning electron microscope, a Brunauer–Emmett–Teller N2 adsorption analyzer, a chemisorption analyzer, and an inductively coupled plasma–optical emission spectrometer were used complementarily for the characterization of catalyst materials. The results show that we can successfully synthesize composite solid-based catalysts with adjustable chemical and physical properties, including surface basicity. The liquid–solid reaction system is useful for the mechanistic understanding of the cyclodehydrohalogenation of 3-MCH catalyzed by the solid-based catalysts, especially the byproduct generation paths and the catalyst deactivation by surface poisoning. The results show that the conversion rate of cyclodehydrohalogenation of 3-MCH to GLD was proportional to the amount of total basic sites on the catalyst, and the selectivity to GLD was proportional to the medium basicity strength of the catalyst. The fundamental understanding obtained in this study provides valuable design principles for composite solid-based catalysts for a wide variety of dehydrohalogenation reactions.

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Cu-ZnO@Al2O3 hybrid nanoparticle with enhanced activity for catalytic CO2 conversion to methanol

Cited by 20 publications

References 44 publications

Design of Aerosol Nanoparticles for Interfacial Catalysis

Design of Aerosol Nanoparticles for Interfacial Catalysis

Conversion of Plastic Waste into Supports for Nanostructured Heterogeneous Catalysts: Application in Environmental Remediation

Sustainable Synthesis of Epoxides from Halohydrin Cyclization by Composite Solid-Based Catalysts

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