Hydrogenation of CO2 Promoted by Silicon-Activated H2S: Origin and Implications

Liu, Xing

doi:10.3390/molecules26010050

Cited by 2 publications

(1 citation statement)

References 56 publications

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“…In addition, the H 2 O molecule has been found to act as a hydrogen donor in CO 2 reduction. Liu [13] found that the transfer of hydrogen to CO x in the form of H 2 S at low temperatures was not feasible kinetically, while the adsorption of CO 2 on the surface of silicon-activated H 2 S can produce HCOOH.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Research on the Reduction of CO2 with H2S on Pyrite FeS2 Surfaces

Liu,

Li,

Feng

et al. 2023

Minerals

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Understanding the reduction of CO2 and the origin and evolution of early life on Earth is an important research endeavor. Pyrite, due to its semiconductor properties, is believed to play a pivotal role as a reactant or catalyst in converting reducing gases, such as CO2, into organic matter. In this study, we employed density functional theory (DFT) to investigate the reduction of CO2 in the presence of H2S on the surface of pyrite. Our findings reveal that the presence of sulfur vacancies enhances the adsorption of H2S and CO2 molecules onto the pyrite surface. Interestingly, we observed the generation of the HCOOH molecule on the defective pyrite surface. Additionally, the transition state analysis indicates that H2S and CO2 molecules require the overcoming of an energy barrier (Ea) of 36.93 kJ/mol to form the HCOOH molecule. This study sheds light on the role of pyrite in the early creation of life on Earth by elucidating its impact on the reduction of carbon dioxide.

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Section: Introductionmentioning

confidence: 99%

Theoretical Research on the Reduction of CO2 with H2S on Pyrite FeS2 Surfaces

Liu,

Li,

Feng

et al. 2023

Minerals

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Direct Synthesis of Formic Acid from Carbon Dioxide by Hydrogenation Over Ruthenium Metal Doped Titanium Dioxide Nanoparticles in Functionalized Ionic Liquid

Srivastava

2022

COCAT

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Background: Presently worldwide manufacturing of formic acid follows the permutation of methanol and carbon monoxide in the presence of a strong base. But due to the use of toxic CO molecules and easy availability of CO2 molecules in the atmosphere, most of the research has been shifted from the conventional method of formic acid synthesis to direct hydrogenation of CO2 gas using different homogenous and heterogeneous catalysts. Objective: The study aims to develop a reaction protocol to achieve easy CO2 hydrogenation to formic acid using an Ionic liquid reaction medium. Methods: We used the sol-gel method followed by calcination (over 250oC for 5 hours) to synthesize two types of ruthenium metal-doped TiO2 nanoparticles (with and without ionic liquids) Ru@TiO2@IL and Ru@TiO2. We report the application NR2 (R= CH3) containing imidazolium-based ionic liquids to achieve a good reaction rate and get agglomeration free ruthenium metal-doped TiO2 nanoparticles along with easy product isolation due to the presence of NR2 (R= CH3) functionality in ionic liquid structure. We synthesized various NR2 (R= CH3) functionalized ionic liquids such as 1-Butyl-3-methylimidazolium Chloride, 1,3-di(N,N-dimethylaminoethyl)-2-methylimidazolium trifluoromethane sulfonate ([DAMI][TfO]), 1,3-di(N,N-dimethylaminoethyl)-2-methylimidazolium bis (trifluoromethylsulfonyl) imide ([DAMI][NTf2]) and 1-butyl-3-methylimidazolium chloride ionic liquids were synthesized as per the reported procedure. Results: We quickly developed two typed of Ru metal-doped TiO2 nanoparticles using the sol-gel method. After calcination, both Ru@TiO2@IL (3.2 wt% Ru), and Ru@TiO2 (1.7 wt% Ru) materials were characterized by XRD, FTIR, TEM, ICP-AES, EDS, and XANES analysis. After understanding the correct structural arrangement of Ru metal over TiO2 support, we utilized both Ru@TiO2@IL (3.2 wt% Ru) and Ru@TiO2 (1.7 wt% Ru) the materials as a catalyst for direct hydrogenation of CO2 in the presence of water. We functionalized [DAMI] [TfO] ionic liquid. Conclusion: After understanding the correct morphology and physiochemical analysis of Ru@TiO2@IL (3.2 wt% Ru), and Ru@TiO2 (1.7 wt% Ru) catalysts, we examined their application in CO2 reduction and formic acid synthesis. Here we demonstrated the preparation and characterization of TiO2 supported Ru nanoparticles with and without ionic liquid. We also noticed the significant effect of functionalized [DAMI] [TfO] ionic liquid and water to improve the formic acid yield during the optimization. Last, we also checked the stability of the catalyst by recycling the same till the 7th run.

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Hydrogenation of CO2 Promoted by Silicon-Activated H2S: Origin and Implications

Cited by 2 publications

References 56 publications

Theoretical Research on the Reduction of CO2 with H2S on Pyrite FeS2 Surfaces

Theoretical Research on the Reduction of CO2 with H2S on Pyrite FeS2 Surfaces

Direct Synthesis of Formic Acid from Carbon Dioxide by Hydrogenation Over Ruthenium Metal Doped Titanium Dioxide Nanoparticles in Functionalized Ionic Liquid

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