Au20Pd1@SiO2 nanoreactors highly effective in CO oxidation Article

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Overview

abstract

• Au cores partially covered with Pd (molar ratio Au20:Pd1) were homogeneously encapsulated into silica shells to form AuPd%40SiO2 nanoreactors via usage of high polyvinylpyrrolidone (PVP) concentration and prolonged time of nanoparticle treatment with PVP before bimetallic nanoparticle encapsulation. The presence of both metals in the core of the nanoreactors was confirmed by means of STEM-EDS, UV-Vis and XPS. The AuPd%40SiO2 nanoreactors showed enhanced catalytic activity in CO oxidation compared with that for reference Au%40SiO2 nanoreactors. The developed experimental procedure for successful encapsulation of bimetallic nanoparticles into silica is relevant for the design of gold-based nanoreactors with modified cores. © 2016 Inderscience Enterprises Ltd.
• Au cores partially covered with Pd (molar ratio Au20:Pd1) were homogeneously encapsulated into silica shells to form AuPd@SiO2 nanoreactors via usage of high polyvinylpyrrolidone (PVP) concentration and prolonged time of nanoparticle treatment with PVP before bimetallic nanoparticle encapsulation. The presence of both metals in the core of the nanoreactors was confirmed by means of STEM-EDS, UV-Vis and XPS. The AuPd@SiO2 nanoreactors showed enhanced catalytic activity in CO oxidation compared with that for reference Au@SiO2 nanoreactors. The developed experimental procedure for successful encapsulation of bimetallic nanoparticles into silica is relevant for the design of gold-based nanoreactors with modified cores. © 2016 Inderscience Enterprises Ltd.

authors

• Acosta Ruelas Brenda Jeanneth
• Evangelista V.
• Fuentes S.
• Miridonov S.
• Simakov A.
• Smolentseva E.

publication date

• 2016-01-01

published in

• International Journal of Nanotechnology  Journal

Research

keywords

• AuPd@SiO2 nanoreactors; CO oxidation; Homogeneous encapsulation; Polyvinylpyrrolidone (PVP); SiO2 shell Catalyst activity; Catalytic oxidation; Molar concentration; Molar ratio; Nanoparticles; Nanoreactors; Oxidation; Palladium compounds; Silica; Silicon; SiO2 nanoparticles; Bimetallic nanoparticles; Co oxidation; Enhanced catalytic activity; Experimental procedure; Polyvinyl pyrrolidone; Silica shell; SiO2 shell; Gold compounds

Identity

Digital Object Identifier (DOI)

• 10.1504/IJNT.2016.074532

Additional Document Info

start page

• 168

end page

• 184

volume

• 13

issue

• 1-3