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Direct production of molecular oxygen from carbon dioxide and helium ion collisions.

ABSTRACT: The prebiotic mechanism to produce molecular oxygen (O₂) in carbon dioxide (CO₂)-rich planetary atmospheres is of great importance in understanding astrochemical reactions and is potentially relevant to the origin of life on Earth. Here, we demonstrate that, aside from the direct productions of O₂ by photodissociation and dissociative electron attachment, the low-energy ion-molecule reaction between cationic helium in solar winds and molecular CO₂ is a noticeable mechanism. Branching ratios of the reaction channels are determined, and their absolute cross-sections are estimated accordingly. The present findings represent a further, indispensable step towards fully understanding the origins of atmospheric O₂.

SUBMITTER: Zhi Y

PROVIDER: S-EPMC10700575 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature

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Direct production of molecular oxygen from carbon dioxide and helium ion collisions.

Zhi Yaya Y Guo Qiang Q Xie Jingchen J Hu Jie J Tian Shan Xi SX

Communications chemistry 20231206 1

The prebiotic mechanism to produce molecular oxygen (O2) in carbon dioxide (CO2)-rich planetary atmospheres is of great importance in understanding astrochemical reactions and is potentially relevant to the origin of life on Earth. Here, we demonstrate that, aside from the direct productions of O2 by photodissociation and dissociative electron attachment, the low-energy ion-molecule reaction between cationic helium in solar winds and molecular CO2 is a ...[more]

PMID: 38057399

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