States of Pt/CeO2 catalysts for CO oxidation below room temperature

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475749" target="_blank" >RIV/00216208:11320/23:10475749 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xP0c878JhT" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=xP0c878JhT</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jcat.2023.03.004" target="_blank" >10.1016/j.jcat.2023.03.004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

States of Pt/CeO2 catalysts for CO oxidation below room temperature

Popis výsledku v původním jazyce

CO molecules can be efficiently oxidized over Pt/CeO2 catalysts, but the stability and reactivity of differ-ent states of Pt in the catalysts are still unclear. Here we combine experimental and computational meth-ods to characterize Pt/CeO2 catalysts subjected to reductive and oxidative pre-treatments and exposed CO oxidation reaction conditions. Particles of metallic Pt, known to be catalytically active at elevated tem-perature, are shown to be precursors for the formation, under operando conditions, of more stable PtOx particles that enable CO oxidation below room temperature. These PtOx particles are similarly stable to - but more active than - atomically dispersed Pt2+ species. The results and approaches presented this study illustrate the complex response of catalytic materials to reaction conditions and pave the way for future efforts to improve Pt/CeO2 and similar catalysts using dedicated pre-treatment strategies.(c) 2023 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Název v anglickém jazyce

States of Pt/CeO2 catalysts for CO oxidation below room temperature

Popis výsledku anglicky

CO molecules can be efficiently oxidized over Pt/CeO2 catalysts, but the stability and reactivity of differ-ent states of Pt in the catalysts are still unclear. Here we combine experimental and computational meth-ods to characterize Pt/CeO2 catalysts subjected to reductive and oxidative pre-treatments and exposed CO oxidation reaction conditions. Particles of metallic Pt, known to be catalytically active at elevated tem-perature, are shown to be precursors for the formation, under operando conditions, of more stable PtOx particles that enable CO oxidation below room temperature. These PtOx particles are similarly stable to - but more active than - atomically dispersed Pt2+ species. The results and approaches presented this study illustrate the complex response of catalytic materials to reaction conditions and pave the way for future efforts to improve Pt/CeO2 and similar catalysts using dedicated pre-treatment strategies.(c) 2023 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Catalysis

ISSN

0021-9517

e-ISSN

1090-2694

Svazek periodika

421

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

285-299

Kód UT WoS článku

000972463000001

EID výsledku v databázi Scopus

2-s2.0-85151238757