Design of Aerosol Nanoparticles for Interfacial Catalysis

Abstract

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.

Efficient Calcium Looping-Integrated Methane Dry Reforming by Dual Functional Aerosol Ca–Ni–Ce Nanoparticle Clusters

“…The aerosolized droplets are then delivered to a diffusion drying unit consisting of a preheating chamber and a silica-filled diffusion dryer. Here, the soluble precursors were dried and crystallized to form dried precursor particles via gas-phase EISA. ,, In the following stage (i.e., first thermal treatment), dried precursor particles are delivered to a quartz-made flow reactor for calcination at 550 °C, forming nanoparticles (NPs) of mixed oxides (CaO–NiO–CeO 2 ) with a homogeneous elemental distribution. After reduction under 0.25 L/min of H 2 flow at 700 °C (i.e., second-stage thermal treatment), NiO was selectively converted to Ni, while CaO and CeO 2 remained in oxide states.…”

“…Here, the soluble precursors were dried and crystallized to form dried precursor particles via gas-phase EISA. 29,36,37 Materials Characterization. Morphologies of the synthesized materials were examined using a high-resolution transmission electron microscope (JEM-2100HT; JEOL, Tokyo, Japan) equipped with an energy-dispersive spectrometer operated at an acceleration voltage of 300 kV and a field emission scanning electron microscope (SU8010; Hitachi, Tokyo, Japan) in combination with EDS operated at 10 kV.…”

“…As demonstrated in Scheme , Ca, Ni, and Ce precursors are uniformly mixed in the precursor solution and nebulized to become droplets. Through the evaporation-induced self-assembly (EISA) of precursors in the gas phase, the droplets become dried aerosol particles with a homogeneous elemental distribution. − After the first calcination stage, the dried aerosols of precursors are converted to hybrid nanostructures of metal oxides (CaO–NiO–CeO 2 ). NiO is then transformed to Ni after the second stage of reduction, whereby CaO and CeO 2 remained in the oxidized state.…”

DFT study on stereoselective Rh-catalyzed intramolecular [2 + 2 + 2] cycloaddition of allene–ene–ynes

“…Modern organic synthesis basically requires the addition of catalysts. At present, there are many types of catalysts that have been studied, such as molecular sieves, 1 ionic liquids, 2 ion exchange resins, 3 nanoparticles, 4 N-heterocyclic carbenes, 5 metal oxides, 6 metal–organic frameworks, 7 transition metals, 8 and so on. Among them, the homogeneous transition metal catalysts have the special properties of high chemical stability and reusability, so they have become the most popular catalysts for making useful products.…”

Exploring the Challenges of Calcium Looping Integrated with Methane Bireforming for Enhanced Carbon Capture and Utilization

“…First, the combination of SRM and DRM allows for better control over the hydrogen-to-carbon monoxide (H 2 /CO) ratio in the syngas. , DRM typically yields a near-equal H 2 /CO ratio of 1:1, which may not always be ideal for certain downstream processes. However, incorporation of steam in BRM enables the adjustment of the H 2 /CO ratio toward a higher hydrogen content (i.e., H 2 /CO = 2:1). , This flexibility in tailoring the syngas composition enhances the versatility and suitability of the produced syngas for various industrial applications, such as Fischer–Tropsch synthesis or methanol production. ,, Besides, the presence of steam mitigates coke formation on the catalyst surface, a common issue in DRM, resulting in improved catalyst stability and longevity. ,,– These advantages position BRM as a promising pathway for CCU, warranting further investigation and development.…”