Advances in Designing Au Nanoparticles for Catalytic Epoxidation of Propylene with H2 and O2

Abstract

Au nanoparticles, which can be used in various industrial and environmental applications, have drawn substantial research interest. In this review, a comprehensive background and some insights are provided regarding recent studies concerning the use of Au nanoparticles for catalytic propylene epoxidation with H2 and O2. Over the last two decades, substantial progress has been made toward the efficient production of propylene oxide (PO); this includes the design of highly dispersed Au catalysts on Ti-modified mesoporous silica supports, the optimization of catalytic epoxidation, and the determination of the mechanisms and reaction pathways of epoxidation. Particularly, the critical roles of catalyst synthesis, the types of material support, Au nanoparticle sizes, and the dispersion amounts of Au nanoparticles are emphasized in this review. In future studies, novel, practical, robust, and highly PO-selective Au nanoparticle catalyst systems are expected to be continually designed for the enhanced catalytic epoxidation of propylene.

Advances in metal-based vanadate compound photocatalysts: synthesis, properties and applications

“…Studies have shown that monomeric photocatalysts always lose their photocatalytic activity under the influence of inherent defects such as structural defects, photo corrosion, and rapid recombination of charge carriers produced by light. There are some ways to improve the photocatalytic activity of monomers that can be useful for the industrialization of photocatalysts [117]. For this purpose, conventional methods such as heterogeneous fabrication with other metals, combination with semiconductors, molecular and elemental doping and preparation of nanocomposite have been used so far [118].…”

Entropy-stabilized metal oxide nanoparticles supported on reduced graphene oxide as a highly active heterogeneous catalyst for selective and solvent-free oxidation of toluene: a combined experimental and numerical investigation

“…[12][13][14][15] More generally, the design and engineering of catalysts that selectively activate carbon-hydrogen bonds to produce desired products are still not in the reach of green chemistry. [26][27][28] Only recently, few selective solvent-free processes for conversion of toluene to benzoic acid using Ca 2 Sb 2 O 7 , Co-MOF-74@NDHPI, and Co@N/Co-CNT catalysts have been reported. [16][17][18] Moreover, the graphene oxides (GO) with different metal-based architectural designs have been applied for different oxidation reactions such as CO and alcohol oxidation and water splitting.…”

“…[19][20][21][22][23][24][25] However, developing catalysts that selectively activate carbon-hydrogen bonds and modify reaction pathways to produce desired products is still challenging in green chemistry. [26][27][28] The entropy stabilization concept has triggered an extensive research interest in exploring the vast compositional space provided by multicomponent materials containing four or more elements. Such multicomponent materials usually crystallize into a single-phase solid solution and exhibit a superior combination of properties compared to conventional solid solutions.…”

“…19–25 However, developing catalysts that selectively activate carbon–hydrogen bonds and modify reaction pathways to produce desired products is still challenging in green chemistry. 26–28…”

Combining trace Pt with surface silylation to boost Au/uncalcined TS‐1 catalyzed propylene epoxidation with H2 and O2

“…Direct gas‐phase epoxidation of propylene with H 2 and O 2 over Au‐Ti catalysts has attracted considerable interests for clean and economical production of propylene oxide (PO) compared to the traditionally industrial processes 1–4 . Among the tested catalysts, the Au nanoparticles immobilized on uncalcined TS‐1 have exhibited state‐of‐the‐art PO formation rate and stability by avoiding the deactivation caused by micropore blocking 5–7 .…”