Supported metal and metal oxide particles with proximity effect for catalysis

Biswas, Subhadeep; Pal, Anjali; Pal, Tarasankar

doi:10.1039/d0ra06168a

Cited by 40 publications

(21 citation statements)

References 186 publications

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“…These results clearly indicate that sintering of the ZrO 2 primary particles and Ni particles occurred. Meanwhile, the coprecipitation technique is an alternative way to prepare noble metal catalysts supported on base metal oxides [ 23 ]. Typically, a mixed solution of a noble metal salt and a base metal salt is neutralized by an alkaline solution to yield a coprecipitate containing mixed hydroxides of both metals.…”

Section: Resultsmentioning

confidence: 99%

One-Step Solvothermal Synthesis of Ni Nanoparticle Catalysts Embedded in ZrO2 Porous Spheres to Suppress Carbon Deposition in Low-Temperature Dry Reforming of Methane

et al. 2022

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Ni nanoparticle catalysts embedded in ZrO2 porous spheres and ZrO2 porous composite spheres, SiO2-ZrO2, MgO-ZrO2, and Y2O3-ZrO2, with 83−115 nm diameter and 167–269 m2/g specific surface area were prepared by a one-pot and one-step solvothermal reaction from precursor solutions consisting of Ni(NO3)2‧6H2O, Zr(OnBu)4, and acetylacetone in moist ethanol combined with either Si(OEt)4, magnesium acetylacetate, or Y(OiPr)3. The obtained Ni catalysts have high specific surface areas of 130–196 m2/g, even after high-temperature reduction by H2 at 450 °C for 2 h. They were utilized as catalysts for low-temperature dry reforming of methane (DRM) at 550 °C to suppress carbon deposition on Ni nanoparticles. The Ni catalysts embedded in SiO2-ZrO2 and Y2O3-ZrO2 demonstrated high catalytic activity and long stability in the reaction. Moreover, carbon deposition on Ni nanoparticles in the DRM reaction was effectively suppressed in when using the SiO2-ZrO2 and Y2O3-ZrO2 composites. Graphical abstract

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Section: Resultsmentioning

confidence: 99%

One-Step Solvothermal Synthesis of Ni Nanoparticle Catalysts Embedded in ZrO2 Porous Spheres to Suppress Carbon Deposition in Low-Temperature Dry Reforming of Methane

et al. 2022

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“…Noble metal nanoparticles (NPs) on oxide supports are common catalytic materials in several key technologies [1,2] . They have numerous applications in the chemical industry, environmental catalysis, photocatalysis, fuel production, and electrocatalysis [3–6] .…”

Section: Figurementioning

confidence: 99%

Silica Support Affects the Catalytic Hydrogen Evolution by Silver

et al. 2021

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Silica supported silver nanoparticles, SiO2‐Ag0‐NPs, catalyze the hydrolysis of BH4−. A comparison of the isotopic composition of the hydrogen formed in the hydrolysis of BD4− points out that the contribution of hydrides, the Heyrovsky mechanism, rather than that of hydrogen atoms, the Tafel mechanism, to the hydrogen evolution is considerably larger for the SiO2‐Ag0‐NPs catalyzed process than for the Ag0‐NPs catalyzed process. This indicates some electron transfer from the SiO2 to the silver that increases the negative charge on the Ag0‐NPs.

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“…In vitro and in vivo studies indicate that reactive oxygen species (ROS) are produced by the exposure of nanoparticles, which is a predominant mechanism leading to toxicity. Immobilization and metal oxide nanoparticle catalyst supports are approaches for suppressing these drawbacks [ 17 , 18 ]. Solid supports play important roles in supporting metal oxide nanoparticles, by positioning themselves as ligands and protectors for reactive and uncontrolled conditions; these can contribute to providing an active surface site which contribute directly to the reactivity.…”

Section: Introductionmentioning

confidence: 99%

“…Silica-alumina-based materials, as well as porous materials, have been reported to be good solid supports for many metal oxide catalysts and photocatalysts [ 17 , 19 ]. The capability of these materials for adsorbing target compounds is a distinct advantage for efficient mechanisms which are usually studied by such kinetics and mechanism models.…”

Section: Introductionmentioning

confidence: 99%

Clay-Supported Metal Oxide Nanoparticles in Catalytic Advanced Oxidation Processes: A Review

et al. 2022

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Advanced oxidation processes (AOPs) utilizing heterogeneous catalysts have attracted great attention in the last decade. The use of solid catalysts, including metal and metal oxide nanoparticle support materials, exhibited better performance compared with the use of homogeneous catalysts, which is mainly related to their stability in hostile environments and recyclability and reusability. Various solid supports have been reported to enhance the performance of metal and metal oxide catalysts for AOPs; undoubtedly, the utilization of clay as a support is the priority under consideration and has received intensive interest. This review provides up-to-date progress on the synthesis, features, and future perspectives of clay-supported metal and metal oxide for AOPs. The methods and characteristics of metal and metal oxide incorporated into the clay structure are strongly influenced by various factors in the synthesis, including the kind of clay mineral. In addition, the benefits of nanomaterials from a green chemistry perspective are key aspects for their further considerations in various applications. Special emphasis is given to the basic schemes for clay modifications and role of clay supports for the enhanced mechanism of AOPs. The scaling-up issue is suggested for being studied to further applications at industrial scale.

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Supported metal and metal oxide particles with proximity effect for catalysis

Abstract: Catalysts are empowered with proper support materials (SM). The proximity effect, in other word ‘synergism’ between the two, is still necessary to be explored at the molecular level to revamp this never ending field of catalysis.

Cited by 40 publications

References 186 publications

One-Step Solvothermal Synthesis of Ni Nanoparticle Catalysts Embedded in ZrO2 Porous Spheres to Suppress Carbon Deposition in Low-Temperature Dry Reforming of Methane

One-Step Solvothermal Synthesis of Ni Nanoparticle Catalysts Embedded in ZrO2 Porous Spheres to Suppress Carbon Deposition in Low-Temperature Dry Reforming of Methane

Silica Support Affects the Catalytic Hydrogen Evolution by Silver

Clay-Supported Metal Oxide Nanoparticles in Catalytic Advanced Oxidation Processes: A Review

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