Enhancing the low-temperature performance of Pt-based three-way catalysts using CeO2(core)@ZrO2(shell) supports

Chih Han Liu; Junjie Chen; Patrick R. Raffaelle; Michael J. Lance; Jacob Concolino; Prateek Khatri; Tala Mon; Todd J. Toops; Alexander A. Shestopalov; Eleni A. Kyriakidou

doi:10.1039/d4cy00921e

Enhancing the low-temperature performance of Pt-based three-way catalysts using CeO₂(core)@ZrO₂(shell) supports

Chih Han Liu
, Junjie Chen
, Patrick R. Raffaelle
, Michael J. Lance
, Jacob Concolino
, Prateek Khatri
, Tala Mon
, Todd J. Toops
, Alexander A. Shestopalov
, Eleni A. Kyriakidou

Department of Chemical and Biological Engineering

SUNY Buffalo
University of Rochester
Oak Ridge National Laboratory

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Developing robust Pt/CeO₂-based three-way catalysts (TWCs) with enhanced oxygen buffering capability and low-temperature activity is highly desirable. In this study, a new TWC family, Pt/(1 − x)CeO₂(core)@xZrO₂(shell) (where x = 0-0.5), was prepared and evaluated at degreened (DG) and hydrothermally aged (HTA) states. Incorporation of 0.1 molar concentration of ZrO₂ resulted in a decreased temperature that 50% (T₅₀) (CO: 167 °C, THCs: 218 °C, NO: 228 °C) and 90% (T₉₀) (CO: 207 °C, THCs: 237 °C, NO: 244 °C) conversions achieved over HTA 1.8 wt% Pt/0.9CeO₂@0.1ZrO₂ compared to the HTA 1.8 wt% Pt/CeO₂ sphere (CO: T_50,90 = 179, 222 °C, THCs: 234, 252 °C, NO_x: 240, 260 °C). An enhanced oxygen storage capacity and oxygen release rate were observed over Pt/0.9CeO₂@0.1ZrO₂ compared to the Pt/CeO₂ sphere. Increasing the ZrO₂ molar concentration to values greater than 0.2 resulted in increased T₅₀s (224, 265 274 °C) and T₉₀s (251, 289, 292 °C) for CO, THCs, and NO_x, respectively, over 1.8 wt.% Pt/0.5CeO₂@0.5ZrO₂. Overall, this work highlights the potential of forming a ZrO₂ shell on CeO₂ spheres as a support for TWC applications.

Original language	English
Pages (from-to)	3298-3306
Number of pages	9
Journal	Catalysis Science and Technology
Volume	15
Issue number	11
DOIs	https://doi.org/10.1039/d4cy00921e
State	Published - Apr 17 2025

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10.1039/d4cy00921e

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@article{dcd372586bd348f486bf8041b2b15970,

title = "Enhancing the low-temperature performance of Pt-based three-way catalysts using CeO2(core)@ZrO2(shell) supports",

abstract = "Developing robust Pt/CeO2-based three-way catalysts (TWCs) with enhanced oxygen buffering capability and low-temperature activity is highly desirable. In this study, a new TWC family, Pt/(1 − x)CeO2(core)@xZrO2(shell) (where x = 0-0.5), was prepared and evaluated at degreened (DG) and hydrothermally aged (HTA) states. Incorporation of 0.1 molar concentration of ZrO2 resulted in a decreased temperature that 50\% (T50) (CO: 167 °C, THCs: 218 °C, NO: 228 °C) and 90\% (T90) (CO: 207 °C, THCs: 237 °C, NO: 244 °C) conversions achieved over HTA 1.8 wt\% Pt/[email protected] compared to the HTA 1.8 wt\% Pt/CeO2 sphere (CO: T50,90 = 179, 222 °C, THCs: 234, 252 °C, NOx: 240, 260 °C). An enhanced oxygen storage capacity and oxygen release rate were observed over Pt/[email protected] compared to the Pt/CeO2 sphere. Increasing the ZrO2 molar concentration to values greater than 0.2 resulted in increased T50s (224, 265 274 °C) and T90s (251, 289, 292 °C) for CO, THCs, and NOx, respectively, over 1.8 wt.\% Pt/[email protected]. Overall, this work highlights the potential of forming a ZrO2 shell on CeO2 spheres as a support for TWC applications.",

author = "Liu, \{Chih Han\} and Junjie Chen and Raffaelle, \{Patrick R.\} and Lance, \{Michael J.\} and Jacob Concolino and Prateek Khatri and Tala Mon and Toops, \{Todd J.\} and Shestopalov, \{Alexander A.\} and Kyriakidou, \{Eleni A.\}",

note = "Publisher Copyright: {\textcopyright} 2025 The Royal Society of Chemistry.",

year = "2025",

month = apr,

day = "17",

doi = "10.1039/d4cy00921e",

language = "English",

volume = "15",

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journal = "Catalysis Science and Technology",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Enhancing the low-temperature performance of Pt-based three-way catalysts using CeO2(core)@ZrO2(shell) supports

AU - Liu, Chih Han

AU - Chen, Junjie

AU - Raffaelle, Patrick R.

AU - Lance, Michael J.

AU - Concolino, Jacob

AU - Khatri, Prateek

AU - Mon, Tala

AU - Toops, Todd J.

AU - Shestopalov, Alexander A.

AU - Kyriakidou, Eleni A.

PY - 2025/4/17

Y1 - 2025/4/17

N2 - Developing robust Pt/CeO2-based three-way catalysts (TWCs) with enhanced oxygen buffering capability and low-temperature activity is highly desirable. In this study, a new TWC family, Pt/(1 − x)CeO2(core)@xZrO2(shell) (where x = 0-0.5), was prepared and evaluated at degreened (DG) and hydrothermally aged (HTA) states. Incorporation of 0.1 molar concentration of ZrO2 resulted in a decreased temperature that 50% (T50) (CO: 167 °C, THCs: 218 °C, NO: 228 °C) and 90% (T90) (CO: 207 °C, THCs: 237 °C, NO: 244 °C) conversions achieved over HTA 1.8 wt% Pt/[email protected] compared to the HTA 1.8 wt% Pt/CeO2 sphere (CO: T50,90 = 179, 222 °C, THCs: 234, 252 °C, NOx: 240, 260 °C). An enhanced oxygen storage capacity and oxygen release rate were observed over Pt/[email protected] compared to the Pt/CeO2 sphere. Increasing the ZrO2 molar concentration to values greater than 0.2 resulted in increased T50s (224, 265 274 °C) and T90s (251, 289, 292 °C) for CO, THCs, and NOx, respectively, over 1.8 wt.% Pt/[email protected]. Overall, this work highlights the potential of forming a ZrO2 shell on CeO2 spheres as a support for TWC applications.

AB - Developing robust Pt/CeO2-based three-way catalysts (TWCs) with enhanced oxygen buffering capability and low-temperature activity is highly desirable. In this study, a new TWC family, Pt/(1 − x)CeO2(core)@xZrO2(shell) (where x = 0-0.5), was prepared and evaluated at degreened (DG) and hydrothermally aged (HTA) states. Incorporation of 0.1 molar concentration of ZrO2 resulted in a decreased temperature that 50% (T50) (CO: 167 °C, THCs: 218 °C, NO: 228 °C) and 90% (T90) (CO: 207 °C, THCs: 237 °C, NO: 244 °C) conversions achieved over HTA 1.8 wt% Pt/[email protected] compared to the HTA 1.8 wt% Pt/CeO2 sphere (CO: T50,90 = 179, 222 °C, THCs: 234, 252 °C, NOx: 240, 260 °C). An enhanced oxygen storage capacity and oxygen release rate were observed over Pt/[email protected] compared to the Pt/CeO2 sphere. Increasing the ZrO2 molar concentration to values greater than 0.2 resulted in increased T50s (224, 265 274 °C) and T90s (251, 289, 292 °C) for CO, THCs, and NOx, respectively, over 1.8 wt.% Pt/[email protected]. Overall, this work highlights the potential of forming a ZrO2 shell on CeO2 spheres as a support for TWC applications.

UR - https://www.scopus.com/pages/publications/105003491699

U2 - 10.1039/d4cy00921e

DO - 10.1039/d4cy00921e

M3 - Article

AN - SCOPUS:105003491699

SN - 2044-4753

VL - 15

SP - 3298

EP - 3306

JO - Catalysis Science and Technology

JF - Catalysis Science and Technology

IS - 11

ER -

Enhancing the low-temperature performance of Pt-based three-way catalysts using CeO₂(core)@ZrO₂(shell) supports

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