Halloysite nanotube supported Ru nanocatalysts synthesized by the inclusion of preformed Ru nanoparticles for preferential oxidation of CO in H2-rich atmosphere

Wang, Li and Chen, Jiuling and Ge, Lei and Rudolph, Victor and Zhu, Zhonghua (2013) Halloysite nanotube supported Ru nanocatalysts synthesized by the inclusion of preformed Ru nanoparticles for preferential oxidation of CO in H2-rich atmosphere. The Journal of Physical Chemistry C, 117 (8). pp. 4141-4151. ISSN 1932-7447

Abstract

The small-sized and well-dispersed Ru nanocatalysts supported on halloysite nanotubes (HNTs) were synthesized
by the inclusion of preformed Ru nanoparticles onto HNTs (Ru NPs/HNTs) and employed for the preferential oxidation of CO in H2-rich atmosphere (PROX). Polyol reduction was adopted to prepare Ru nanoparticles, and the synthesis conditions affected the morphology of the resulting nanoparticles. The catalysis results show that the Ru NPs/HNTs present significantly higher CO conversion and CO2 selectivity than the catalyst prepared by traditional wet impregnation. RuCl3 is a better Ru precursor than
Ru(acac)3 for synthesizing Ru nanoparticles with higher catalytic reactivity. The catalytic performance of Ru NPs/HNTs can be further enhanced by the reduction pretreatment due to the removal of polyvinylpyrrolidone (PVP) capping on the surface of Ru nanoparticles, and this enhancement is more significant with reduction at 400 °C than at 200 °C. Finally, the characterizations on
the used catalysts indicate that the morphology of Ru nanoparticles is maintained after PROX reaction; slight growth of particle size is observed with 200 °C reduction pretreatment, yet Ru nanoparticles lose their original size and shape with 400 °C reduction.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: No Faculty
Date Deposited: 04 May 2017 02:51
Last Modified: 04 May 2017 02:51
Uncontrolled Keywords: catalytic performance; catalytic reactivity; CO conversion; growth of particles; halloysite nanotube (HNTs); halloysite nanotubes; polyol reductions; polyvinyl pyrrolidone; preferential oxidation; PROX reaction; reduction pretreatment; Ru nanocatalysts; Ru nanoparticles; Ru(acac); size and shape; synthesis conditions; well-dispersed; wet impregnation; carbon dioxide; catalyst activity; catalyst selectivity; morphology; nanoparticles; nanotubes; ruthenium compounds
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090402 Catalytic Process Engineering
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/jp312491m
URI: http://eprints.usq.edu.au/id/eprint/31142

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