Does HNO3 dissociate on gas-phase ice nanoparticles?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00573653" target="_blank" >RIV/61388955:_____/23:00573653 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0344043" target="_blank" >https://hdl.handle.net/11104/0344043</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/D3CP02757K" target="_blank" >10.1039/D3CP02757K</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Does HNO3 dissociate on gas-phase ice nanoparticles?

Popis výsledku v původním jazyce

We investigated the dissociation of nitric acid on large water clusters (H2O)N, [N with combining macron] ≈ 30–500, i.e., ice nanoparticles with diameters of 1–3 nm, in a molecular beam. The (H2O)N clusters were doped with single HNO3 molecules in a pickup cell and probed by mass spectrometry after a low-energy (1.5–15 eV) electron attachment. The negative ion mass spectra provided direct evidence for HNO3 dissociation with the formation of NO3−⋯H3O+ ion pairs, but over half of the observed cluster ions originated from non-dissociated HNO3 molecules. This behavior is in contrast with the complete dissociation of nitric acid on amorphous ice surfaces above 100 K. Thus, the proton transfer is significantly suppressed on nanometer-sized particles compared to macroscopic ice surfaces. This can have considerable implications for heterogeneous processes on atmospheric ice particles.n

Název v anglickém jazyce

Does HNO3 dissociate on gas-phase ice nanoparticles?

Popis výsledku anglicky

We investigated the dissociation of nitric acid on large water clusters (H2O)N, [N with combining macron] ≈ 30–500, i.e., ice nanoparticles with diameters of 1–3 nm, in a molecular beam. The (H2O)N clusters were doped with single HNO3 molecules in a pickup cell and probed by mass spectrometry after a low-energy (1.5–15 eV) electron attachment. The negative ion mass spectra provided direct evidence for HNO3 dissociation with the formation of NO3−⋯H3O+ ion pairs, but over half of the observed cluster ions originated from non-dissociated HNO3 molecules. This behavior is in contrast with the complete dissociation of nitric acid on amorphous ice surfaces above 100 K. Thus, the proton transfer is significantly suppressed on nanometer-sized particles compared to macroscopic ice surfaces. This can have considerable implications for heterogeneous processes on atmospheric ice particles.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GA21-07062S" target="_blank" >GA21-07062S: Klastry PAH v laboratorním výzkumu astrochemických a atmosférických procesů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Physical Chemistry Chemical Physics

ISSN

1463-9076

e-ISSN

1463-9084

Svazek periodika

25

Číslo periodika v rámci svazku

32

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

21154-21161

Kód UT WoS článku

001026635000001

EID výsledku v databázi Scopus

2-s2.0-85166191621