Thermally stable single-atom platinum-on-ceria catalysts via atom trapping

John Jones; Haifeng Xiong; Andrew T DeLaRiva; Eric J Peterson; Hien Pham; Sivakumar R Challa; Gongshin Qi; Se Oh; Michelle H Wiebenga; Xavier Isidro Pereira Hernández; Yong Wang; Abhaya K Datye

doi:10.1126/science.aaf8800

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Thermally stable single-atom platinum-on-ceria catalysts via atom trapping

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Thermally stable single-atom platinum-on-ceria catalysts via atom trapping

John Jones, Haifeng Xiong, Andrew T DeLaRiva, Eric J Peterson, Hien Pham, Sivakumar R Challa, Gongshin Qi, Se Oh, Michelle H Wiebenga, Xavier Isidro Pereira Hernández, …

Science (American Association for the Advancement of Science), Vol.353(6295), pp.150-154

07/08/2016

DOI: https://doi.org/10.1126/science.aaf8800

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https://hdl.handle.net/2376/115980

PMID: 27387946

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Abstract

Catalysts based on single atoms of scarce precious metals can lead to more efficient use through enhanced reactivity and selectivity. However, single atoms on catalyst supports can be mobile and aggregate into nanoparticles when heated at elevated temperatures. High temperatures are detrimental to catalyst performance unless these mobile atoms can be trapped. We used ceria powders having similar surface areas but different exposed surface facets. When mixed with a platinum/aluminum oxide catalyst and aged in air at 800°C, the platinum transferred to the ceria and was trapped. Polyhedral ceria and nanorods were more effective than ceria cubes at anchoring the platinum. Performing synthesis at high temperatures ensures that only the most stable binding sites are occupied, yielding a sinter-resistant, atomically dispersed catalyst.

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Title: Thermally stable single-atom platinum-on-ceria catalysts via atom trapping
Creators: John Jones - Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM 87131, USA
Haifeng Xiong - Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM 87131, USA
Andrew T DeLaRiva - Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM 87131, USA
Eric J Peterson - Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM 87131, USA
Hien Pham - Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM 87131, USA
Sivakumar R Challa - Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM 87131, USA
Gongshin Qi - General Motors Global R&D, 30500 Mound Road, Warren, MI 48090, USA
Se Oh - General Motors Global R&D, 30500 Mound Road, Warren, MI 48090, USA
Michelle H Wiebenga - General Motors Global R&D, 30500 Mound Road, Warren, MI 48090, USA
Xavier Isidro Pereira Hernández - Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, USA
Yong Wang - Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99164, USA. Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354, USA
Abhaya K Datye - Department of Chemical and Biological Engineering and Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM 87131, USA. datye@unm.edu
Publication Details: Science (American Association for the Advancement of Science), Vol.353(6295), pp.150-154
Academic Unit: Chemical Engineering and Bioengineering, School of
Publisher: United States
Identifiers: 99900547859101842
Language: English
Resource Type: Journal article