scholarly journals Pd@TiO2/carbon nanohorn electrocatalysts: reversible CO2 hydrogenation to formic acid

2018 ◽  
Vol 11 (6) ◽  
pp. 1571-1580 ◽  
Author(s):  
M. Melchionna ◽  
M. V. Bracamonte ◽  
A. Giuliani ◽  
L. Nasi ◽  
T. Montini ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Formic Acid ◽  
Thermodynamic Equilibrium ◽  
Enzymatic Catalysis ◽  
Direct Conversion ◽  
Co2 Hydrogenation ◽  
Synthetic Analogs ◽  
Carbon Neutral

Direct conversion of carbon dioxide to formic acid at thermodynamic equilibrium is an advantage of enzymatic catalysis, hardly replicated by synthetic analogs, but of high priority for carbon-neutral energy schemes.

Theoretical study of CO2 hydrogenation into formic acid on Lewis acid zeolites

2018 ◽  
Vol 20 (39) ◽  
pp. 25179-25185 ◽  
Author(s):  
Worawaran Thongnuam ◽  
Thana Maihom ◽  
Saowapak Choomwattana ◽  
Yuwanda Injongkol ◽  
Bundet Boekfa ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Density Functional Theory ◽  
Formic Acid ◽  
Density Functional ◽  
Theoretical Study ◽  
Co2 Hydrogenation ◽  
Functional Theory ◽  
Acid Zeolites ◽  
Acidic Zeolites ◽  
Hydrogenation Of Carbon Dioxide

The hydrogenation of carbon dioxide (CO2) to formic acid over Lewis acidic zeolites as catalyst has been investigated by means of density functional theory (DFT) with the M06-L functional.

scholarly journals Theoretical Study of Direct Carbon Dioxide Conversion to Formic Acid on Transition Metal-doped Subnanometer Palladium Clusters

2021 ◽  
Vol 53 (4) ◽  
pp. 210402
Author(s):  
Adhitya Gandaryus Saputro ◽  
Arifin Luthfi Maulana ◽  
Fine Dwinita Aprilyanti ◽  
Hermawan Kresno Dipojono
Keyword(s):  
Activation Energy ◽  
Transition Metal ◽  
Formic Acid ◽  
Density Functional ◽  
Direct Conversion ◽  
Hydrogenation Reaction ◽  
Co2 Hydrogenation ◽  
Reverse Water Gas Shift ◽  
Metal Doped ◽  
Water Gas

We studied the direct conversion of CO2 to HCOOH through hydrogenation reaction without the presence of base additives on the transition metal-doped subnanometer palladium (Pd7) cluster (PdxM: M = Cu, Ni, Rh) by using a combination of density functional theory and microkinetic calculations. It was shown that the CO2 hydrogenation on Pd7 and Pd6M clusters are more selective towards the formate pathway to produce HCOOH than the reverse water gas shift pathway to produce CO. Inclusion of Ni and Rh doping in the subnanometer Pd7 cluster could successfully enhance the turnover frequency (TOF) for CO2 hydrogenation to formic acid at low temperature. The order of TOF for formic acid formation is as follows: Pd6Ni > Pd6Rh > Pd7 > Pd6Cu. This order can be explained by the trend of the activation energy of CO2 hydrogenation to formate (HCOO*). The Pd6Ni cluster has the highest TOF value because it has the lowest activation energy for the formate formation reaction. The Pd6Ni system also has a superior TOF profile for HCOOH formation compared to several metal surfaces in low and high-temperature regions. This finding suggests that the subnanometer PdxNi cluster is a promising catalyst candidate for direct CO2 hydrogenation to formic acid.

PdAg Alloy Nanoparticles Immobilized on Functionalized MIL-101-NH2: Effect of Organic Amines for Hydrogenation of Carbon Dioxide into Formic Acid

2021 ◽  
Author(s):  
Lingfei Xu ◽  
Tianchen Cui ◽  
Juan Zhu ◽  
Xinkui Wang ◽  
Min Ji
Keyword(s):  
Carbon Dioxide ◽  
Formic Acid ◽  
Co2 Hydrogenation ◽  
Alloy Nanoparticles ◽  
Co2 Utilization ◽  
Excellent Performance ◽  
Carbon Dioxide Co2 ◽  
Organic Amines ◽  
Hydrogenation Of Carbon Dioxide

Exploration of excellent performance catalysts for carbon dioxide (CO2) hydrogenation is essential for CO2 utilization. In this work, a series of PdAg nanoparticles (NPs) immobilized on various organic amines functionalized...

Thin-water-film-enhanced TiO2-based catalyst for CO2 hydrogenation to formic acid

2022 ◽  
Author(s):  
Shaoqin Chen ◽  
Siyuan Fang ◽  
Zongwei Sun ◽  
Zhangyang Li ◽  
Chunling Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Formic Acid ◽  
Catalytic System ◽  
Value Added ◽  
Water Film ◽  
Co2 Hydrogenation ◽  
Three Phase ◽  
Thin Water Film

Carbon dioxide (CO2) hydrogenation can not only mitigate global warming, but also produce value-added chemicals. Herein, we report a novel three-phase catalytic system with an in-situ generated and dynamically updated...

Photochemical and Electrochemical Reduction of Carbon Dioxide Catalyzed by a Polyoxometalate-Organic Photosensitizer Complex

2018 ◽  
Author(s):  
Chandan Dey ◽  
Ronny Neumann
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Voltammetry ◽  
Formic Acid ◽  
Electrochemical Reduction ◽  
Mass Spectroscopy ◽  
Photochemical Reactions ◽  
Reducing Agent ◽  
Covalent Attachment ◽  
Hybrid Complex ◽  
Open Face

<p>A manganese substituted Anderson type polyoxometalate, [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup>, tethered with an anthracene photosensitizer was prepared and used as catalyst for CO<sub>2</sub> reduction. The polyoxometalate-photosensitizer hybrid complex, obtained by covalent attachment of the sensitizer to only one face of the planar polyoxometalate, was characterized by NMR, IR and mass spectroscopy. Cyclic voltammetry measurements show a catalytic response for the reduction of carbon dioxide, thereby suggesting catalysis at the manganese site on the open face of the polyoxometalate. Controlled potentiometric electrolysis showed the reduction of CO<sub>2</sub> to CO with a TOF of ~15 sec<sup>-1</sup>. Further photochemical reactions showed that the polyoxometalate-anthracene hybrid complex was active for the reduction of CO<sub>2</sub> to yield formic acid and/or CO in varying amounts dependent on the reducing agent used. Control experiments showed that the attachment of the photosensitizer to [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup> is necessary for photocatalysis.</p><div><br></div>

Direct Conversion of Carbon Dioxide to Methane over Ceria‐ and Alumina‐Supported Nickel Catalysts for Biogas Valorization

ChemPlusChem ◽  
2021 ◽  
Author(s):  
Wojciech Gac ◽  
Witold Zawadzki ◽  
Marek Rotko ◽  
Magdalena Greluk ◽  
Grzegorz Słowik ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Nickel Catalysts ◽  
Direct Conversion ◽  
Supported Nickel Catalysts
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