Abiotic Formation of Methane and Prebiotic Molecules on Mars and Other Planets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F21%3A00543199" target="_blank" >RIV/61388955:_____/21:00543199 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/21:10442257

Výsledek na webu

<a href="http://hdl.handle.net/11104/0320469" target="_blank" >http://hdl.handle.net/11104/0320469</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsearthspacechem.1c00041" target="_blank" >10.1021/acsearthspacechem.1c00041</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Abiotic Formation of Methane and Prebiotic Molecules on Mars and Other Planets

Popis výsledku v původním jazyce

We explored the photocatalytic (UV-driven) reduction of CO2 on mineral surfaces in acidic conditions and observed the production of methane. Based on our measured laboratory reaction rates, we estimate a 2.81 × 107 cm-2 s-1 methane surface flux on the current-day Mars. We also estimate a Martian methane destruction rate of 2.37 × 105 cm-2 s-1, which is 2 orders of magnitude less than the production rate. The flux of the photochemically produced methane therefore seems sufficient to explain the background levels of methane detected on Mars. This photocatalytic reduction is part of a proposed novel reaction network tightly bound to the chemistry of CO2 in planetary atmospheres described in this paper. The emergent methane-enriched atmosphere can be transformed by high-energy-density events on rocky planets to nucleic acid bases and amino acids. Finally, destructive processes, such as volcanic eruptions or lightning storms, can turn the synthesized products back into CO2 in any step. This proposed scenario should be, in our opinion, included in models of exoplanetary chemistry.

Název v anglickém jazyce

Abiotic Formation of Methane and Prebiotic Molecules on Mars and Other Planets

Popis výsledku anglicky

We explored the photocatalytic (UV-driven) reduction of CO2 on mineral surfaces in acidic conditions and observed the production of methane. Based on our measured laboratory reaction rates, we estimate a 2.81 × 107 cm-2 s-1 methane surface flux on the current-day Mars. We also estimate a Martian methane destruction rate of 2.37 × 105 cm-2 s-1, which is 2 orders of magnitude less than the production rate. The flux of the photochemically produced methane therefore seems sufficient to explain the background levels of methane detected on Mars. This photocatalytic reduction is part of a proposed novel reaction network tightly bound to the chemistry of CO2 in planetary atmospheres described in this paper. The emergent methane-enriched atmosphere can be transformed by high-energy-density events on rocky planets to nucleic acid bases and amino acids. Finally, destructive processes, such as volcanic eruptions or lightning storms, can turn the synthesized products back into CO2 in any step. This proposed scenario should be, in our opinion, included in models of exoplanetary chemistry.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF16_019%2F0000778" target="_blank" >EF16_019/0000778: Centrum pokročilých aplikovaných přírodních věd</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

ACS Earth and Space Chemistry

ISSN

2472-3452

e-ISSN

2472-3452

Svazek periodika

5

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1172-1179

Kód UT WoS článku

000655638500017

EID výsledku v databázi Scopus

2-s2.0-85106408962