Photoreduction of inorganic carbon(+IV) by elemental sulfur: Implications for prebiotic synthesis in terrestrial hot springs.
Photoreduction of inorganic carbon(+IV) by elemental sulfur: Implications for prebiotic synthesis in terrestrial hot springs.
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元素硫对无机碳(IV)的光还原:对陆地温泉中益生元合成的影响
DOI:
10.1126/sciadv.abc3687
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发表时间:
2020-11
期刊:
影响因子:
13.6
通讯作者:
Lu A
中科院分区:
文献类型:
--
作者:
Li Y;Li Y;Liu Y;Wu Y;Wu J;Wang B;Ye H;Jia H;Wang X;Li L;Zhu M;Ding H;Lai Y;Wang C;Dick J;Lu A
Photoreduction of CO2 by UV-excited elemental sulfur could have supported prebiotic synthesis in terrestrial hot springs. Terrestrial hydrothermal systems have been proposed as alternative birthplaces for early life but lacked reasonable scenarios for the supply of biomolecules. Here, we show that elemental sulfur (S0), as the dominant mineral in terrestrial hot springs, can reduce carbon dioxide (CO2) into formic acid (HCOOH) under ultraviolet (UV) light below 280 nm. The semiconducting S0 is indicated to have a direct bandgap of 4.4 eV. The UV-excited S0 produces photoelectrons with a highly negative potential of −2.34 V (versus NHE, pH 7), which could reduce CO2 after accepting electrons from electron donors such as reducing sulfur species. Simultaneously, UV light breaks sulfur bonds, benefiting the adsorption of charged carbonates onto S0 and assisting their photoreduction. Assuming that terrestrial hot springs covered 1% of primitive Earth’s surface, S0 at 10 μM could have produced maximal 109 kg/year HCOOH within 10-cm-thick photic zones, underlying its remarkable contributions to the accumulation of prebiotic biomolecules.
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影响因子:
3.7
作者:
Kresse, G;Furthmuller, J
通讯作者:
Furthmuller, J
影响因子:
4
作者:
COOK, BE;SPEAR, WE
通讯作者:
SPEAR, WE
影响因子:
2.4
作者:
Cockell, CS
通讯作者:
Cockell, CS
影响因子:
16.6
作者:
Djokic T;Van Kranendonk MJ;Campbell KA;Walter MR;Ward CR
通讯作者:
Ward CR
影响因子:
12.9
作者:
Firet, Nienke J.;Smith, Wilson A.
通讯作者:
Smith, Wilson A.