Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen

Xavier Isidro Pereira-Hernández, Andrew DeLaRiva, Valery Muravev, Deepak Kunwar, Haifeng Xiong, Berlin Sudduth, Mark Engelhard, Libor Kovarik, Emiel J.M. Hensen (Corresponding author), Yong Wang (Corresponding author), Abhaya K. Datye (Corresponding author)

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6 Citaties (Scopus)

Uittreksel

In this work, we compare the CO oxidation performance of Pt single atom catalysts (SACs) prepared via two methods: (1) conventional wet chemical synthesis (strong electrostatic adsorption–SEA) with calcination at 350 °C in air; and (2) high temperature vapor phase synthesis (atom trapping–AT) with calcination in air at 800 °C leading to ionic Pt being trapped on the CeO 2 in a thermally stable form. As-synthesized, both SACs are inactive for low temperature (<150 °C) CO oxidation. After treatment in CO at 275 °C, both catalysts show enhanced reactivity. Despite similar Pt metal particle size, the AT catalyst is significantly more active, with onset of CO oxidation near room temperature. A combination of near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO temperature-programmed reduction (CO-TPR) shows that the high reactivity at low temperatures can be related to the improved reducibility of lattice oxygen on the CeO 2 support.

TaalEngels
Artikelnummer1358
Aantal pagina's10
TijdschriftNature Communications
Volume10
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 1 dec 2019

Vingerafdruk

Carbon Monoxide
Tuning
Vapors
tuning
vapor phases
Oxygen
catalysts
Temperature
oxygen
synthesis
Catalysts
roasting
oxidation
reactivity
Atoms
Oxidation
Calcination
interactions
atoms
Air

Citeer dit

Pereira-Hernández, X. I., DeLaRiva, A., Muravev, V., Kunwar, D., Xiong, H., Sudduth, B., ... Datye, A. K. (2019). Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen. Nature Communications, 10(1), [1358]. DOI: 10.1038/s41467-019-09308-5
Pereira-Hernández, Xavier Isidro ; DeLaRiva, Andrew ; Muravev, Valery ; Kunwar, Deepak ; Xiong, Haifeng ; Sudduth, Berlin ; Engelhard, Mark ; Kovarik, Libor ; Hensen, Emiel J.M. ; Wang, Yong ; Datye, Abhaya K./ Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen. In: Nature Communications. 2019 ; Vol. 10, Nr. 1.
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abstract = "In this work, we compare the CO oxidation performance of Pt single atom catalysts (SACs) prepared via two methods: (1) conventional wet chemical synthesis (strong electrostatic adsorption–SEA) with calcination at 350 °C in air; and (2) high temperature vapor phase synthesis (atom trapping–AT) with calcination in air at 800 °C leading to ionic Pt being trapped on the CeO 2 in a thermally stable form. As-synthesized, both SACs are inactive for low temperature (<150 °C) CO oxidation. After treatment in CO at 275 °C, both catalysts show enhanced reactivity. Despite similar Pt metal particle size, the AT catalyst is significantly more active, with onset of CO oxidation near room temperature. A combination of near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO temperature-programmed reduction (CO-TPR) shows that the high reactivity at low temperatures can be related to the improved reducibility of lattice oxygen on the CeO 2 support.",
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Pereira-Hernández, XI, DeLaRiva, A, Muravev, V, Kunwar, D, Xiong, H, Sudduth, B, Engelhard, M, Kovarik, L, Hensen, EJM, Wang, Y & Datye, AK 2019, 'Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen' Nature Communications, vol. 10, nr. 1, 1358. DOI: 10.1038/s41467-019-09308-5

Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen. / Pereira-Hernández, Xavier Isidro; DeLaRiva, Andrew; Muravev, Valery; Kunwar, Deepak; Xiong, Haifeng; Sudduth, Berlin; Engelhard, Mark; Kovarik, Libor; Hensen, Emiel J.M. (Corresponding author); Wang, Yong (Corresponding author); Datye, Abhaya K. (Corresponding author).

In: Nature Communications, Vol. 10, Nr. 1, 1358, 01.12.2019.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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AU - DeLaRiva,Andrew

AU - Muravev,Valery

AU - Kunwar,Deepak

AU - Xiong,Haifeng

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AU - Engelhard,Mark

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AU - Hensen,Emiel J.M.

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AU - Datye,Abhaya K.

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Pereira-Hernández XI, DeLaRiva A, Muravev V, Kunwar D, Xiong H, Sudduth B et al. Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen. Nature Communications. 2019 dec 1;10(1). 1358. Beschikbaar vanaf, DOI: 10.1038/s41467-019-09308-5