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.
| Taal | Engels |
|---|---|
| Artikelnummer | 1358 |
| Aantal pagina's | 10 |
| Tijdschrift | Nature Communications |
| Volume | 10 |
| Nummer van het tijdschrift | 1 |
| DOI's | |
| Status | Gepubliceerd - 1 dec 2019 |
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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 tijdschrift › Tijdschriftartikel › Academic › peer review
TY - JOUR
T1 - Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen
AU - Pereira-Hernández,Xavier Isidro
AU - DeLaRiva,Andrew
AU - Muravev,Valery
AU - Kunwar,Deepak
AU - Xiong,Haifeng
AU - Sudduth,Berlin
AU - Engelhard,Mark
AU - Kovarik,Libor
AU - Hensen,Emiel J.M.
AU - Wang,Yong
AU - Datye,Abhaya K.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85063580303&partnerID=8YFLogxK
U2 - 10.1038/s41467-019-09308-5
DO - 10.1038/s41467-019-09308-5
M3 - Article
VL - 10
JO - Nature Communications
T2 - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 1358
ER -