Nanoplasmonic sensing to study CO and oxygen adsorption and CO oxidation on size-selected Pt₁₀ clusters

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00600611" target="_blank" >RIV/61388955:_____/24:00600611 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0357920" target="_blank" >https://hdl.handle.net/11104/0357920</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d4nr02682a" target="_blank" >10.1039/d4nr02682a</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanoplasmonic sensing to study CO and oxygen adsorption and CO oxidation on size-selected Pt₁₀ clusters

Popis výsledku v původním jazyce

The adsorption of CO and oxygen and CO oxidation on size-selected Pt-10 clusters were studied by indirect nanoplasmonic sensing (INPS) in the pressure range of 1-100 Pa at T = 418 K. CO adsorption was reversible, inducing a blue-shift in the localised surface plasmon resonance (LSPR) response, regardless of the initial CO pressure. We observe a plateau at approximately Delta lambda =0.1 nm at P-CO > 2.7 Pa, indicating saturation of CO adsorption on Pt-10 clusters. Oxygen induces both chemisorption and oxidation of Pt-10 clusters until a regime is reached where Delta lambda(max) remains positive and constant, showing that the Pt-10 clusters are completely oxidised. CO oxidation at different molar fractions is also followed by INPS. All results are discussed in relation to our previous works on 3 nm Pt nanocubes [B. Demirdjian, I. Ozerov, F. Bedu, A. Ranguis and C. R. Henry, ACS Omega, 2021, <bold>6</bold>, 13398-13405]. The study demonstrates the suitability of INPS towards the understanding of the nature and function of matter in the largely unexplored subnanometer size regime where properties can often dramatically change when altering the particle size by a single atom.

Název v anglickém jazyce

Nanoplasmonic sensing to study CO and oxygen adsorption and CO oxidation on size-selected Pt₁₀ clusters

Popis výsledku anglicky

The adsorption of CO and oxygen and CO oxidation on size-selected Pt-10 clusters were studied by indirect nanoplasmonic sensing (INPS) in the pressure range of 1-100 Pa at T = 418 K. CO adsorption was reversible, inducing a blue-shift in the localised surface plasmon resonance (LSPR) response, regardless of the initial CO pressure. We observe a plateau at approximately Delta lambda =0.1 nm at P-CO > 2.7 Pa, indicating saturation of CO adsorption on Pt-10 clusters. Oxygen induces both chemisorption and oxidation of Pt-10 clusters until a regime is reached where Delta lambda(max) remains positive and constant, showing that the Pt-10 clusters are completely oxidised. CO oxidation at different molar fractions is also followed by INPS. All results are discussed in relation to our previous works on 3 nm Pt nanocubes [B. Demirdjian, I. Ozerov, F. Bedu, A. Ranguis and C. R. Henry, ACS Omega, 2021, <bold>6</bold>, 13398-13405]. The study demonstrates the suitability of INPS towards the understanding of the nature and function of matter in the largely unexplored subnanometer size regime where properties can often dramatically change when altering the particle size by a single atom.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EH22_008%2F0004558" target="_blank" >EH22_008/0004558: Pokročilé víceškálové materiály pro nosné klíčové technologie</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Nanoscale

ISSN

2040-3364

e-ISSN

2040-3372

Svazek periodika

16

Číslo periodika v rámci svazku

45

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

20968-20976

Kód UT WoS článku

001341288200001

EID výsledku v databázi Scopus

2-s2.0-85207719028