A Novel Abiotic Pathway for Phosphine Synthesis over Acidic Dust in Venus' Atmosphere

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00586724" target="_blank" >RIV/61388955:_____/24:00586724 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/24:10480934

Result on the web

<a href="https://www.liebertpub.com/doi/10.1089/ast.2023.0046" target="_blank" >https://www.liebertpub.com/doi/10.1089/ast.2023.0046</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1089/ast.2023.0046" target="_blank" >10.1089/ast.2023.0046</a>

Result language

angličtina

Original language name

A Novel Abiotic Pathway for Phosphine Synthesis over Acidic Dust in Venus' Atmosphere

Original language description

Recent ground-based observations of Venus have detected a single spectral feature consistent with phosphine (PH3) in the middle atmosphere, a gas which has been suggested as a biosignature on rocky planets. The presence of PH3 in the oxidized atmosphere of Venus has not yet been explained by any abiotic process. However, state-of-the-art experimental and theoretical research published in previous works demonstrated a photochemical origin of another potential biosignature-the hydride methane-from carbon dioxide over acidic mineral surfaces on Mars. The production of methane includes formation of the HC center dot O radical. Our density functional theory (DFT) calculations predict an energetically plausible reaction network leading to PH3, involving either HC center dot O or H center dot radicals. We suggest that, similarly to the photochemical formation of methane over acidic minerals already discussed for Mars, the origin of PH3 in Venus' atmosphere could be explained by radical chemistry starting with the reaction of center dot PO with HC center dot O, the latter being produced by reduction of CO2 over acidic dust in upper atmospheric layers of Venus by ultraviolet radiation. HPO, H2P center dot O, and H3P center dot OH have been identified as key intermediate species in our model pathway for phosphine synthesis.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Astrobiology

ISSN

1531-1074

e-ISSN

1557-8070

Volume of the periodical

24

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

16

Pages from-to

407-422

UT code for WoS article

001200313900001

EID of the result in the Scopus database

2-s2.0-85190486436