Issue 46, 2016, Issue in Progress

Thermally stable sandwich-type catalysts of Pt nanoparticles encapsulated in CeO2 nanorod/CeO2 nanoparticle core/shell supports for methane oxidation at high temperatures

Abstract

The thermal stability of nanocatalysts is of great importance to develop high performing catalysts in terms of high activity and robust catalytic stability, especially for high-temperature catalysis. Herein, we report a sandwich-type Pt nanocatalyst encapsulated in ceria-based core/shell supports (CNR@Pt@CNP), which consists of CeO2 nanorods as core, CeO2 nanoparticles as shell and Pt nanoparticles (PtNPs) embedded between the CeO2 nanorods and CeO2 nanoparticles. The catalysts exhibited remarkable thermal stability at high temperature by effectively preventing PtNPs from thermal sintering. Methane combustion was carried out on the CNR@Pt@CNP catalysts at 400–700 °C to evaluate their catalytic activity and stability. By comparing to the same amount of PtNPs supported on CeO2 nanorods (CNR@Pt), CNR@Pt@CNP delivered higher catalytic activity at high temperatures (>500 °C). The methane conversion catalyzed by CNR@Pt@CNP slightly decreased from 82.3% to 80.0% after 12 hours at 650 °C. The improved performance of CNR@Pt@CNP originated from the CeO2 nanoparticles as stabilizer, which can prevent the thermal sintering of PtNPs, strengthen the thermal stability of the catalyst and enhance the metal-support interaction.

Graphical abstract: Thermally stable sandwich-type catalysts of Pt nanoparticles encapsulated in CeO2 nanorod/CeO2 nanoparticle core/shell supports for methane oxidation at high temperatures

Supplementary files

Article information

Article type
Paper
Submitted
07 Mar 2016
Accepted
13 Apr 2016
First published
14 Apr 2016

RSC Adv., 2016,6, 40323-40329

Thermally stable sandwich-type catalysts of Pt nanoparticles encapsulated in CeO2 nanorod/CeO2 nanoparticle core/shell supports for methane oxidation at high temperatures

Z. Zhang, J. Li, W. Gao, Z. Xia, Y. Qin, Y. Qu and Y. Ma, RSC Adv., 2016, 6, 40323 DOI: 10.1039/C6RA05967H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements