Rh(0)/Rh(iii) core–shell nanoparticles as heterogeneous catalysts for cyclic carbonate synthesis

Rh(0)/Rh(iii) core–shell nanoparticles, generated by surface oxidation with N-bromosuccinimide, exhibited high activity and excellent recyclability for cyclic carbonate synthesis.

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Preparation of Core-Shell Silica - 12-Tungstophosphoricacid Nanoparticles for Acylation of Aromatics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.706-708.219 ◽

2013 ◽

Vol 706-708 ◽

pp. 219-223

Author(s):

Hsiu Ling Hsu ◽

Rosilda Selvin ◽

L. Selva Roselin

Keyword(s):

Liquid Phase ◽

High Activity ◽

Solid Acid ◽

Coke Formation ◽

Solid Acid Catalysts ◽

Core Shell ◽

Acid Catalysts ◽

Shell Nanoparticles ◽

Core Shell Nanoparticles ◽

Enhanced Selectivity

A variety of solid acid catalysts especially 12-Tungstophosphoricacid (DTP) supported on silica has been reported for the acylation of anisole, veratrole and toluene. However, the activity of this catalyst is susceptible to coke formation or poor activity. This paper reports the novelties of steam treated SiO2-DTP core-shell nanoparticles, which exhibits tremendous stability, high activity and enhanced selectivity in the liquid-phase acylation of anisole, veratrole and toluene as compared to conventional DTP supported on silica.

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Impact of the capping agent removal from Au NPs@MOF core-shell nanoparticles heterogeneous catalysts

Journal of Materials Chemistry A ◽

10.1039/d1ta09108e ◽

2022 ◽

Author(s):

Shan Dai ◽

Kieu Phung Ngoc ◽

Laurence Grimaud ◽

Sanjun Zhang ◽

Antoine Tissot ◽

...

Keyword(s):

Metal Nanoparticles ◽

Heterogeneous Catalysts ◽

Synergistic Effects ◽

Core Shell ◽

Capping Agent ◽

Shell Nanoparticles ◽

Au Nps ◽

Capping Agents ◽

Core Shell Nanoparticles

Metal nanoparticles encased in a MOF shell have shown remarkable properties in catalysis due to potential synergistic effects. However, capping agents, commonly used to prepare these nanoparticles, lower their reactivity...

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Core-Shell Nanostructure ofα-Fe2O3/Fe3O4: Synthesis and Photocatalysis for Methyl Orange

Journal of Nanomaterials ◽

10.1155/2011/837123 ◽

2011 ◽

Vol 2011 ◽

pp. 1-5 ◽

Cited By ~ 10

Author(s):

Yang Tian ◽

Di Wu ◽

Xiao Jia ◽

Binbin Yu ◽

Sihui Zhan

Keyword(s):

Magnetic Field ◽

Magnetic Properties ◽

Methyl Orange ◽

Molten Salts ◽

Surface Oxidation ◽

The Self ◽

Core Shell ◽

Shell Nanoparticles ◽

Core Shell Nanoparticles

Fe3O4nanoparticle was synthesized in the solution involving water and ethanol. Then,α-Fe2O3shell was produced in situ on the surface of theFe3O4nanoparticle by surface oxidation in molten salts, formingα-Fe2O3/Fe3O4core-shell nanostructure. It was showed that the magnetic properties transformed from ferromagnetism to superparamagnetism after the primaryFe3O4nanoparticles were oxidized. Furthermore, the obtainedα-Fe2O3/Fe3O4core-shell nanoparticles were used to photocatalyse solution of methyl orange, and the results revealed thatα-Fe2O3/Fe3O4nanoparticles were more efficient than the self-preparedα-Fe2O3nanoparticles. At the same time, the photocatalyzer was recyclable by applying an appropriate magnetic field.

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Photochemical Synthesis and Characterization of Pd@Pt Core-Shell Nanoparticles with Low Cost and High Activity for Methanol Electro-catalytic Oxidation

Rare Metal Materials and Engineering ◽

10.1016/s1875-5372(15)60047-9 ◽

2014 ◽

Vol 43 (12) ◽

pp. 2985-2988 ◽

Cited By ~ 2

Author(s):

Dong Yingnan ◽

Yang Xikun ◽

Li Shanshan ◽

Bi Xiaoguo ◽

Tang Meiling

Keyword(s):

High Activity ◽

Catalytic Oxidation ◽

Low Cost ◽

Photochemical Synthesis ◽

Synthesis And Characterization ◽

Core Shell ◽

Shell Nanoparticles ◽

Electro Catalytic Oxidation ◽

Core Shell Nanoparticles

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Self-driven microstructural evolution of Au@Pd core–shell nanoparticles for greatly enhanced catalytic performance during methanol electrooxidation

Nanoscale ◽

10.1039/d0nr07135h ◽

2021 ◽

Author(s):

Yaxing Liu ◽

Weiyin Li ◽

Guizhe zhao ◽

Gang Qin ◽

Yuexia Li ◽

...

Keyword(s):

Microstructural Evolution ◽

Heterogeneous Catalysts ◽

Catalytic Performance ◽

Methanol Electrooxidation ◽

Core Shell ◽

Electrochemical Polarization ◽

Shell Nanoparticles ◽

Catalytic Materials ◽

Core Shell Nanoparticles ◽

Insight Into

The lack of direct insight into the microstructural evolution of catalytic materials under electrochemical polarization has inhibited the development of heterogeneous catalysts. By investigating a typical Au@Pd core–shell nanostructure, the...

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Activity and Durability of PEFCs Alloy Core-Shell Catalysts: Role of Surface Oxidation

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.93.31 ◽

2014 ◽

Vol 93 ◽

pp. 31-40 ◽

Cited By ~ 1

Author(s):

Guadalupe Ramos-Sanchez ◽

Fernando Godínez-Salomón ◽

Omar Solorza-Feria ◽

Perla Balbuena

Keyword(s):

Oxygen Reduction ◽

Density Functional ◽

Electrochemical Characterizations ◽

Surface Oxidation ◽

Density Functional Theory Calculations ◽

Oxidation Potential ◽

Electrochemical Activity ◽

Core Shell ◽

Shell Nanoparticles ◽

Core Shell Nanoparticles

Low temperature fuel cells are one of the most promising systems for the transformation of fuels into electricity in an efficient, silent, and environmentally friendly manner. In this paper we show the advances accomplished in the synthesis and a theoretical-experimental analysis of the changes induced by the Ni@Pt structure and the presence of the almost unavoidable NiO species. The synthesis of core-shell nanoparticles is described and then physical and electrochemical characterizations confirm the presence of core-shell nanoparticles with a high electrochemical activity towards the Oxygen Reduction Reaction. Periodic density functional theory calculations are used to analyze the shift in the oxidation potential for Pt, Ni@Pt and NiO@Pt with different number of layers in the shell. The changes in the electrochemical activity towards oxygen reduction are evaluated by allowing oxygen to adsorb on the surface of the nanoparticle and alloys. It is found that only the first and second layers of Pt are being affected by the presence of the Ni or NiO core.

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