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Synthesis and characterization of doped nano-sized ceria-zirconia solid solutions

Synthesis and characterization of doped nano-sized ceria-zirconia solid solutions
Synthesis and characterization of doped nano-sized ceria-zirconia solid solutions
Two compositions Ce0.50Zr0.39La0.04Y0.07O2?? and Ce0.25Zr0.65La0.04Y0.06O2?? based on ceria-zirconia solid solutions were prepared as nanopowders using a continuous hydrothermal flow synthesis reactor, followed by either freeze-drying or hotplate-drying of the slurry. Each dried nanopowder was then subjected to 10 h heat-treatment at 1000 °C, 1100 °C or 1200 °C in air (to simulate accelerated ageing). The reducibility and hydrogen consumption of the oxidised samples were measured using temperature programmed reduction (TPR) up to 1000 °C. The effects of composition, drying method and heat-treatment temperature were evaluated on the TPR profiles of the materials. The powders were further investigated using a range of analytical methods including UV/Vis spectroscopy (which yielded colour data), Raman spectroscopy, powder X-ray diffraction, BET surface area measurements and X-ray photoelectron spectroscopy (XPS). Chemometric methods were used to investigate relationships between the spectroscopic and total oxygen storage capacity (OSC) data. Principal component analysis (PCA) was used to provide a simple interpretation of the effects of various synthesis and treatment parameters on Raman spectra. Principal component regression (PCR) was used to build regression models relating the Raman spectra and the temperature of hydrogen consumption peak at several set temperatures in the TPR. The total hydrogen consumption of the materials was generally high, while the drying and heat-treatment conditions appeared to have a significant effect on the final properties of the resulting powders, such as the surface area and total oxygen storage capacity
ceria-zirconia solid solution, nano, supercritical water, hydrothermal synthesis, chemometric
405-415
Weng, Xiaole
2e86c2b0-8c47-46ec-895e-027d5a3a2a6d
Perston, Ben
a7c71ca5-050e-4ad3-b591-292ceb26edf6
Wang, Xue Z.
5d5284a7-dc3f-4741-9dcb-6353f2529347
Abrahams, Isaac
0aff7c81-afb7-4f27-b895-09ff35c970bb
Lin, Tian
23f0cdac-82f4-4dc7-a399-8d51f113a5dc
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Evans, Julian R. G.
1e4ff64d-fdc6-460e-ae9f-f41746899f57
Morgan, David J.
a54eaa5b-09bc-4185-8f18-dfc1eeeb310e
Carley, Albert F.
c053dee4-762f-4dfc-8a26-ad4cc070c849
Bowker, Michael
c9ab10a5-d144-4533-bf6d-2fa16b669565
Knowles, Jonathan C.
5660c13f-e9d0-407a-87a1-50b4fa2c5d69
Rehman, Ihtesham
9f1c9370-9e7b-4172-aeb6-7c26b22c8bf7
Darr, Jawwad A.
e3096708-4001-4347-87ca-5b45060aa63a
Weng, Xiaole
2e86c2b0-8c47-46ec-895e-027d5a3a2a6d
Perston, Ben
a7c71ca5-050e-4ad3-b591-292ceb26edf6
Wang, Xue Z.
5d5284a7-dc3f-4741-9dcb-6353f2529347
Abrahams, Isaac
0aff7c81-afb7-4f27-b895-09ff35c970bb
Lin, Tian
23f0cdac-82f4-4dc7-a399-8d51f113a5dc
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Evans, Julian R. G.
1e4ff64d-fdc6-460e-ae9f-f41746899f57
Morgan, David J.
a54eaa5b-09bc-4185-8f18-dfc1eeeb310e
Carley, Albert F.
c053dee4-762f-4dfc-8a26-ad4cc070c849
Bowker, Michael
c9ab10a5-d144-4533-bf6d-2fa16b669565
Knowles, Jonathan C.
5660c13f-e9d0-407a-87a1-50b4fa2c5d69
Rehman, Ihtesham
9f1c9370-9e7b-4172-aeb6-7c26b22c8bf7
Darr, Jawwad A.
e3096708-4001-4347-87ca-5b45060aa63a

Weng, Xiaole, Perston, Ben, Wang, Xue Z., Abrahams, Isaac, Lin, Tian, Yang, Shoufeng, Evans, Julian R. G., Morgan, David J., Carley, Albert F., Bowker, Michael, Knowles, Jonathan C., Rehman, Ihtesham and Darr, Jawwad A. (2009) Synthesis and characterization of doped nano-sized ceria-zirconia solid solutions. Applied Catalysis B Environmental, 90 (3-4), 405-415. (doi:10.1016/j.apcatb.2009.03.031).

Record type: Article

Abstract

Two compositions Ce0.50Zr0.39La0.04Y0.07O2?? and Ce0.25Zr0.65La0.04Y0.06O2?? based on ceria-zirconia solid solutions were prepared as nanopowders using a continuous hydrothermal flow synthesis reactor, followed by either freeze-drying or hotplate-drying of the slurry. Each dried nanopowder was then subjected to 10 h heat-treatment at 1000 °C, 1100 °C or 1200 °C in air (to simulate accelerated ageing). The reducibility and hydrogen consumption of the oxidised samples were measured using temperature programmed reduction (TPR) up to 1000 °C. The effects of composition, drying method and heat-treatment temperature were evaluated on the TPR profiles of the materials. The powders were further investigated using a range of analytical methods including UV/Vis spectroscopy (which yielded colour data), Raman spectroscopy, powder X-ray diffraction, BET surface area measurements and X-ray photoelectron spectroscopy (XPS). Chemometric methods were used to investigate relationships between the spectroscopic and total oxygen storage capacity (OSC) data. Principal component analysis (PCA) was used to provide a simple interpretation of the effects of various synthesis and treatment parameters on Raman spectra. Principal component regression (PCR) was used to build regression models relating the Raman spectra and the temperature of hydrogen consumption peak at several set temperatures in the TPR. The total hydrogen consumption of the materials was generally high, while the drying and heat-treatment conditions appeared to have a significant effect on the final properties of the resulting powders, such as the surface area and total oxygen storage capacity

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More information

Published date: August 2009
Keywords: ceria-zirconia solid solution, nano, supercritical water, hydrothermal synthesis, chemometric
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 165019
URI: https://eprints.soton.ac.uk/id/eprint/165019
PURE UUID: 47cb0d0f-c35b-4e9f-8a99-92eeaca589ff
ORCID for Shoufeng Yang: ORCID iD orcid.org/0000-0002-3888-3211

Catalogue record

Date deposited: 08 Oct 2010 07:45
Last modified: 06 Jun 2018 12:33

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