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Volume 13
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Article

Effect of High-Energy Milling on Ceria-Zirconia’s Redox Properties

by
Anatoly Bortun
*,
Mila Bortun
,
Benjamin Brown
and
Jeremy Madynski
Pacific Industrial Development Company (PIDC), 4788 Runway Blvd., Ann Arbor, MI 48108, USA
*
Author to whom correspondence should be addressed.
Catalysts 2023, 13(12), 1511; https://doi.org/10.3390/catal13121511
Submission received: 1 November 2023 / Revised: 6 December 2023 / Accepted: 8 December 2023 / Published: 14 December 2023
(This article belongs to the Section Catalytic Materials)
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Abstract

Series of ceria-zirconia (CZ)-based nano-materials with a d50 in the range of 0.2 to 1.3 microns were made using the jar milling, Eiger milling, and steam jet milling (SJM) techniques. The effect of the milling conditions on the morphology and textural properties was studied. High-energy steam jet milling in a quasi-hydrothermal environment (with potential local temperature spikes over 500 °C) significantly impacted the CZ crystal structure by inducing lattice distortions. It was shown that the acquired lattice stress resulted in a significant increase in oxygen mobility, which was manifested by a TPR-H2 Tmax shift from 450–550 to 150–250 °C. CZ materials with fast oxygen mobility are metastable phases, and re-slurring nano-CZ powders in water and impregnation with precious metals had stabilizing effects on fast oxygen mobility. Efficiently enhancing the CZ redox activity milling process took place in the following order: Steam jet milling > Eiger milling > jar milling.
Keywords: ceria-zirconia-based mixed oxides; dry milling; wet milling; steam jet milling; crystal lattice distortions; redox properties; fast oxygen mobility ceria-zirconia-based mixed oxides; dry milling; wet milling; steam jet milling; crystal lattice distortions; redox properties; fast oxygen mobility
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MDPI and ACS Style

Bortun, A.; Bortun, M.; Brown, B.; Madynski, J. Effect of High-Energy Milling on Ceria-Zirconia’s Redox Properties. Catalysts 2023, 13, 1511. https://doi.org/10.3390/catal13121511

AMA Style

Bortun A, Bortun M, Brown B, Madynski J. Effect of High-Energy Milling on Ceria-Zirconia’s Redox Properties. Catalysts. 2023; 13(12):1511. https://doi.org/10.3390/catal13121511

Chicago/Turabian Style

Bortun, Anatoly, Mila Bortun, Benjamin Brown, and Jeremy Madynski. 2023. "Effect of High-Energy Milling on Ceria-Zirconia’s Redox Properties" Catalysts 13, no. 12: 1511. https://doi.org/10.3390/catal13121511

APA Style

Bortun, A., Bortun, M., Brown, B., & Madynski, J. (2023). Effect of High-Energy Milling on Ceria-Zirconia’s Redox Properties. Catalysts, 13(12), 1511. https://doi.org/10.3390/catal13121511

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