Activating low-temperature diesel oxidation by single-atom Pt on TiO2 nanowire array

Son Hoang; Yanbing Guo; Andrew J. Binder; Wenxiang Tang; Sibo Wang; Jingyue (Jimmy) Liu; Tran D. Huan; Xingxu Lu; Yu Wang; Yong Ding; Eleni A. Kyriakidou; Ji Yang; Todd J. Toops; Thomas J. Pauly; Rampi Ramprasad; Pu Xian Gao

doi:10.1038/s41467-020-14816-w

Activating low-temperature diesel oxidation by single-atom Pt on TiO₂ nanowire array

Son Hoang, Yanbing Guo, Andrew J. Binder, Wenxiang Tang, Sibo Wang, Jingyue (Jimmy) Liu, Tran D. Huan, Xingxu Lu, Yu Wang, Yong Ding, Eleni A. Kyriakidou, Ji Yang, Todd J. Toops, Thomas J. Pauly, Rampi Ramprasad, Pu Xian Gao

Physics

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

97 Scopus citations

Abstract

Supported metal single atom catalysts (SACs) present an emerging class of low-temperature catalysts with high reactivity and selectivity, which, however, face challenges on both durability and practicality. Herein, we report a single-atom Pt catalyst that is strongly anchored on a robust nanowire forest of mesoporous rutile titania grown on the channeled walls of full-size cordierite honeycombs. This Pt SAC exhibits remarkable activity for oxidation of CO and hydrocarbons with 90% conversion at temperatures as low as ~160 ^oC under simulated diesel exhaust conditions while using 5 times less Pt-group metals than a commercial oxidation catalyst. Such an excellent low-temperature performance is sustained over hydrothermal aging and sulfation as a result of highly dispersed and isolated active single Pt ions bonded at the Ti vacancy sites with 5 or 6 oxygen ions on titania nanowire surfaces.

Original language	English (US)
Article number	1062
Journal	Nature communications
Volume	11
Issue number	1
DOIs	https://doi.org/10.1038/s41467-020-14816-w
State	Published - Dec 1 2020

ASJC Scopus subject areas

General Physics and Astronomy
General Chemistry
General Biochemistry, Genetics and Molecular Biology

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Hoang, S., Guo, Y., Binder, A. J., Tang, W., Wang, S., Liu, J., Huan, T. D., Lu, X., Wang, Y., Ding, Y., Kyriakidou, E. A., Yang, J., Toops, T. J., Pauly, T. J., Ramprasad, R., & Gao, P. X. (2020). Activating low-temperature diesel oxidation by single-atom Pt on TiO₂ nanowire array. Nature communications, 11(1), Article 1062. https://doi.org/10.1038/s41467-020-14816-w

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abstract = "Supported metal single atom catalysts (SACs) present an emerging class of low-temperature catalysts with high reactivity and selectivity, which, however, face challenges on both durability and practicality. Herein, we report a single-atom Pt catalyst that is strongly anchored on a robust nanowire forest of mesoporous rutile titania grown on the channeled walls of full-size cordierite honeycombs. This Pt SAC exhibits remarkable activity for oxidation of CO and hydrocarbons with 90% conversion at temperatures as low as ~160 oC under simulated diesel exhaust conditions while using 5 times less Pt-group metals than a commercial oxidation catalyst. Such an excellent low-temperature performance is sustained over hydrothermal aging and sulfation as a result of highly dispersed and isolated active single Pt ions bonded at the Ti vacancy sites with 5 or 6 oxygen ions on titania nanowire surfaces.",

author = "Son Hoang and Yanbing Guo and Binder, {Andrew J.} and Wenxiang Tang and Sibo Wang and Liu, {Jingyue (Jimmy)} and Huan, {Tran D.} and Xingxu Lu and Yu Wang and Yong Ding and Kyriakidou, {Eleni A.} and Ji Yang and Toops, {Todd J.} and Pauly, {Thomas J.} and Rampi Ramprasad and Gao, {Pu Xian}",

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AU - Liu, Jingyue (Jimmy)

AU - Huan, Tran D.

AU - Lu, Xingxu

AU - Wang, Yu

AU - Ding, Yong

AU - Kyriakidou, Eleni A.

AU - Yang, Ji

AU - Toops, Todd J.

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AU - Ramprasad, Rampi

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AB - Supported metal single atom catalysts (SACs) present an emerging class of low-temperature catalysts with high reactivity and selectivity, which, however, face challenges on both durability and practicality. Herein, we report a single-atom Pt catalyst that is strongly anchored on a robust nanowire forest of mesoporous rutile titania grown on the channeled walls of full-size cordierite honeycombs. This Pt SAC exhibits remarkable activity for oxidation of CO and hydrocarbons with 90% conversion at temperatures as low as ~160 oC under simulated diesel exhaust conditions while using 5 times less Pt-group metals than a commercial oxidation catalyst. Such an excellent low-temperature performance is sustained over hydrothermal aging and sulfation as a result of highly dispersed and isolated active single Pt ions bonded at the Ti vacancy sites with 5 or 6 oxygen ions on titania nanowire surfaces.

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Activating low-temperature diesel oxidation by single-atom Pt on TiO₂ nanowire array

Abstract

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