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Acidic Hydrogen Enhanced Photocatalytic Reduction of CO2 on Planetary Surfaces
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SYSNO ASEP 0536891 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Acidic Hydrogen Enhanced Photocatalytic Reduction of CO2 on Planetary Surfaces Author(s) Knížek, Antonín (UFCH-W) ORCID, RID, SAI
Kubelík, Petr (UFCH-W) RID, ORCID
Bouša, Milan (UFCH-W) RID, ORCID
Ferus, Martin (UFCH-W) ORCID, RID
Civiš, Svatopluk (UFCH-W) RID, ORCID, SAISource Title ACS Earth and Space Chemistry. - : American Chemical Society - ISSN 2472-3452
Roč. 4, č. 7 (2020), s. 1001-1009Number of pages 9 s. Language eng - English Country US - United States Keywords diffuse-reflectance measurements ; oxygen-isotope exchange ; carbon-dioxide ; band-gap ; tio2 ; methane ; mechanisms ; conversion ; complexes ; photocatalytic reduction of CO2 ; IR spectroscopy ; photocatalysis ; natural minerals ; reflectance ; band gap ; rate constant ; acidic conditions Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA19-03314S GA ČR - Czech Science Foundation (CSF) EF16_019/0000778 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 000551545600006 EID SCOPUS 85088695421 DOI 10.1021/acsearthspacechem.0c00039 Annotation The photocatalytic reduction of CO2 to CH4 is a chemical process that to some extent occurs on the surface of rocky planets. The effect of an acidic proton on the rate of the photocatalytic reduction of CO2 on mineral surfaces was explored through the addition of HCl to our reaction system. HCl serves a dual role: it is a Hdonor (reactant) and creates a band gap in the case of siderite and kaolinite (modifies the chemical environment of the reaction). Of the tested minerals, Al2O3, ilmenite (FeTiO3), and one sample of soil containing fossilized remains of diatoms from the Soos Nature Reserve (Czech Republic) have shown significant activity in the methanogenesis process. Kaolinite, natural rutile, MgO, basalt, acidic and ferrous synthetic clays, the Nakhla meteorite, and two diatomaceous earth samples from the Soos Nature Reserve showed weak photocatalytic properties, the reaction was slower than that on, e.g., Al2O3. The newly recognized photocatalytic activity of some of these natural minerals and the effect of the acidic proton should be included in the atmospheric models of both our planet and exoplanets alike, as it may play a role in the estimation of methane production from CO2 in the presence of minerals on the planetary surface upon UV radiation. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2021 Electronic address http://hdl.handle.net/11104/0314646
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