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

被引：1

作者：

Bortun, Anatoly ^{[1
]}

Bortun, Mila ^{[1
]}

Brown, Benjamin ^{[1
]}

Madynski, Jeremy ^{[1
]}

机构：

[1] Pacific Ind Dev Co PIDC, 4788 Runway Blvd, Ann Arbor, MI 48108 USA

来源：

CATALYSTS | 2023年 / 13卷 / 12期

关键词：

ceria-zirconia-based mixed oxides; dry milling; wet milling; steam jet milling; crystal lattice distortions; redox properties; fast oxygen mobility; CATALYSTS;

D O I：

10.3390/catal13121511

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 degree celsius) 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-H-2 T-max shift from 450-550 to 150-250 degree celsius. 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.

引用

页数：17

共 19 条

[11] Catalytic Materials for Gasoline Particulate Filters Soot Oxidation [J].

Matarrese, Roberto .

CATALYSTS, 2021, 11 (08)

[12]

McCormick PG, 2001, ADV MATER, V13, P1008, DOI 10.1002/1521-4095(200107)13:12/13<1008::AID-ADMA1008>3.0.CO

[13]

2-Q

[14] Catalytic activity of CeO2-ZrO2 mixed oxide catalysts prepared via sol-gel technique:: CO oxidation [J].

Thammachart, M ;

Meeyoo, V ;

Rirksomboon, T ;

Osuwan, S .

CATALYSIS TODAY, 2001, 68 (1-3) :53-61

[15] Nanophase fluorite-structured CeO2-ZrO2 catalysts prepared by high-energy mechanical milling - Analysis of low-temperature redox activity and oxygen storage capacity [J].

Trovarelli, A ;

Zamar, F ;

Llorca, J ;

deLeitenburg, C ;

Dolcetti, G ;

Kiss, JT .

JOURNAL OF CATALYSIS, 1997, 169 (02) :490-502

[16] Catalytic properties of ceria and CeO2-containing materials [J].

Trovarelli, A .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1996, 38 (04) :439-520

[17]

Trovarelli A., 2002, CATALYTIC SCI SERIES, V2

[18] Mechanochemical synthesis of metal oxide nanoparticles [J].

Tsuzuki, Takuya .

COMMUNICATIONS CHEMISTRY, 2021, 4 (01)

[19] CERIA IN AUTOMOTIVE EXHAUST CATALYSTS .1. OXYGEN STORAGE [J].

YAO, HC ;

YAO, YFY .

JOURNAL OF CATALYSIS, 1984, 86 (02) :254-265

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