Silica-encapsulated bimetallic Co-Ni nanoparticles as novel catalysts for partial oxidation of methane to syngas | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

4761309

Reference Type

Journal Article

Title

Silica-encapsulated bimetallic Co-Ni nanoparticles as novel catalysts for partial oxidation of methane to syngas

Author(s)

Li, Lei; Lu, P; Yao, Yao; Ji, W

Year

2012

Is Peer Reviewed?

Yes

Journal

Catalysis Communications
ISSN: 1566-7367

Publisher

Elsevier

Volume

Issue

Elsevier

Page Numbers

72-77

DOI

10.1016/j.catcom.2012.05.005

Web of Science Id

WOS:000308285100016

URL

https://linkinghub.elsevier.com/retrieve/pii/S1566736712001914
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Abstract

The bimetallic Co-Ni nanoparticles that are encapsulated by porous silica shell were synthesized for partial oxidation of methane to syngas. By carefully tuning the Co/Ni ratios of core-shell structured catalysts, the catalytic activity can be efficiently modified: CoNi2@SiO2>Ni@SiO2>CoNi@SiO2>Co2Ni@SiO2>>Co@SiO2. The CoNi2@SiO2 catalyst outperforms the other counterparts at a reaction temperature of 700 degrees C. The proper alloying of Co and Ni metals cannot only enhance catalyst activity but also suppress carbon deposition during the reaction. The encapsulation of the nanoparticles of Co-Ni alloy can also effectively prevent aggregation of core alloy nanoparticles. (C) 2012 Elsevier B.V. All rights reserved.

Keywords

Core-shell structure; Co and Ni; Nanoparticles; Silica; Partial oxidation; Methane