Issue 22, 2018

TiO2-nanosheet-assembled microspheres as Pd-catalyst support for highly-stable low-temperature CO oxidation

Abstract

TiO2 morphology has an important effect on the activity and stability of the noble metals for CO oxidation. Here, hierarchical TiO2 microspheres of about 2.2 μm in diameter with a localized nanosheet about 23.2 nm in thickness, were prepared and used as a support for Pd catalyst. Various characterization methods including TEM, SEM, N2 adsorption, XPS, CO-DRIFTS, CO pulse chemisorption, CO-TPD, O2-TPD, and ICP were used in this study. As compared with commercial TiO2, the special nanosheet assemblied structure of TiO2 with larger surface areas led to higher dispersed Pd species, stronger Pd–TiO2 interaction, and enhanced CO and O2 adsorption, ultimately leading to better catalytic activity and stability. Among the three catalysts of Pd/TiO2-350, Pd/TiO2-P25, and Pd/TiO2-CA, the corresponding 100% conversion temperatures were 80, 140, and 160 °C, respectively. The CO conversion on Pd/TiO2-350 remained stable over 22 h. On the contrary, the Pd/TiO2-P25 catalyst suffered rapid deactivation with time on stream.

Graphical abstract: TiO2-nanosheet-assembled microspheres as Pd-catalyst support for highly-stable low-temperature CO oxidation

Article information

Article type
Paper
Submitted
28 Jul 2018
Accepted
01 Oct 2018
First published
03 Oct 2018

New J. Chem., 2018,42, 18066-18076

TiO2-nanosheet-assembled microspheres as Pd-catalyst support for highly-stable low-temperature CO oxidation

X. Zhai, C. Liu, Q. Chang, C. Zhao, R. Tan, H. Peng, D. Liu, P. Zhang and J. Gui, New J. Chem., 2018, 42, 18066 DOI: 10.1039/C8NJ03768J

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