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Title: Activation of surface lattice oxygen in single-atom Pt/CeO 2 for low-temperature CO oxidation

Abstract

To improve fuel efficiency, advanced combustion engines are being designed to minimize the amount of heat wasted in the exhaust. Hence, future generations of catalysts must perform at temperatures that are 100°C lower than current exhaust-treatment catalysts. Achieving low-temperature activity, while surviving the harsh conditions encountered at high engine loads, remains a formidable challenge. In this study, we demonstrate how atomically dispersed ionic platinum (Pt 2+ ) on ceria (CeO 2 ), which is already thermally stable, can be activated via steam treatment (at 750°C) to simultaneously achieve the goals of low-temperature carbon monoxide (CO) oxidation activity while providing outstanding hydrothermal stability. A new type of active site is created on CeO 2 in the vicinity of Pt 2+ , which provides the improved reactivity. These active sites are stable up to 800°C in oxidizing environments.

Authors:
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Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1435849
Grant/Contract Number:  
FG02-05ER15712; AC05-RL01830
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 358 Journal Issue: 6369; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English

Citation Formats

Nie, Lei, Mei, Donghai, Xiong, Haifeng, Peng, Bo, Ren, Zhibo, Hernandez, Xavier Isidro Pereira, DeLaRiva, Andrew, Wang, Meng, Engelhard, Mark H., Kovarik, Libor, Datye, Abhaya K., and Wang, Yong. Activation of surface lattice oxygen in single-atom Pt/CeO 2 for low-temperature CO oxidation. United States: N. p., 2017. Web. doi:10.1126/science.aao2109.
Nie, Lei, Mei, Donghai, Xiong, Haifeng, Peng, Bo, Ren, Zhibo, Hernandez, Xavier Isidro Pereira, DeLaRiva, Andrew, Wang, Meng, Engelhard, Mark H., Kovarik, Libor, Datye, Abhaya K., & Wang, Yong. Activation of surface lattice oxygen in single-atom Pt/CeO 2 for low-temperature CO oxidation. United States. doi:10.1126/science.aao2109.
Nie, Lei, Mei, Donghai, Xiong, Haifeng, Peng, Bo, Ren, Zhibo, Hernandez, Xavier Isidro Pereira, DeLaRiva, Andrew, Wang, Meng, Engelhard, Mark H., Kovarik, Libor, Datye, Abhaya K., and Wang, Yong. Thu . "Activation of surface lattice oxygen in single-atom Pt/CeO 2 for low-temperature CO oxidation". United States. doi:10.1126/science.aao2109.
@article{osti_1435849,
title = {Activation of surface lattice oxygen in single-atom Pt/CeO 2 for low-temperature CO oxidation},
author = {Nie, Lei and Mei, Donghai and Xiong, Haifeng and Peng, Bo and Ren, Zhibo and Hernandez, Xavier Isidro Pereira and DeLaRiva, Andrew and Wang, Meng and Engelhard, Mark H. and Kovarik, Libor and Datye, Abhaya K. and Wang, Yong},
abstractNote = {To improve fuel efficiency, advanced combustion engines are being designed to minimize the amount of heat wasted in the exhaust. Hence, future generations of catalysts must perform at temperatures that are 100°C lower than current exhaust-treatment catalysts. Achieving low-temperature activity, while surviving the harsh conditions encountered at high engine loads, remains a formidable challenge. In this study, we demonstrate how atomically dispersed ionic platinum (Pt 2+ ) on ceria (CeO 2 ), which is already thermally stable, can be activated via steam treatment (at 750°C) to simultaneously achieve the goals of low-temperature carbon monoxide (CO) oxidation activity while providing outstanding hydrothermal stability. A new type of active site is created on CeO 2 in the vicinity of Pt 2+ , which provides the improved reactivity. These active sites are stable up to 800°C in oxidizing environments.},
doi = {10.1126/science.aao2109},
journal = {Science},
number = 6369,
volume = 358,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aao2109

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Works referenced in this record:

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