Selective, high efficiency reduction of CO2 in a non-diaphragm-based electrochemical system at low applied voltage

RSC Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 9278-9282 ◽  
Author(s):  
Kwang-Jin Yim ◽  
Dong-Keun Song ◽  
Chan-Soo Kim ◽  
Nam-Gyu Kim ◽  
Toru Iwaki ◽  
...  
Keyword(s):  
Applied Voltage ◽  
High Efficiency ◽  
Electrochemical System ◽  
Reduction Of Co2

Electrochemical CO2 reduction in a diaphragm-less cell selectively afforded CH4 and H2 in methanolic NaOH and KOH electrolytes, respectively.

scholarly journals Adsorption and Photocatalytic Reduction of Carbon Dioxide on TiO2

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Oleksandr Shtyka ◽  
Viktar Shatsila ◽  
Radoslaw Ciesielski ◽  
Adam Kedziora ◽  
Waldemar Maniukiewicz ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Active Sites ◽  
High Efficiency ◽  
Chemical Potential ◽  
Band Gap Energy ◽  
Electromagnetic Spectrum ◽  
Reaction Intermediates ◽  
Factors Affecting ◽  
Phase Reduction ◽  
Reduction Of Co2

The photocatalytic activity of TiO2 depends on numerous factors, such as the chemical potential of electrons, charge transport properties, band-gap energy, and concentration of surface-active sites. A lot of research has been dedicated to determining the properties that have the most significant influence on the photocatalytic activity of semiconductors. Here, we demonstrated that the activity of TiO2 in the gas-phase reduction of CO2 is governed mainly by the desorption rate of the reaction intermediates and final products. This indicates that the specific surface area of TiO2 and binding strength of reaction intermediates and products are the main factors affecting the photocatalytic activity of TiO2 in the investigated process. Additionally, it was shown that rutile exhibits higher photocatalytic activity than anatase/rutile mixtures mainly due to its high efficiency in the visible portion of the electromagnetic spectrum.

scholarly journals Arc Plasma Deposited Copper and Gold Nanoparticles on FTO Substrate for Electrochemical Reduction of CO2

2019 ◽  
Vol 3 (1) ◽  
Keyword(s):  
Gold Nanoparticles ◽  
Formic Acid ◽  
Electrochemical Reduction ◽  
High Efficiency ◽  
Plasma Deposition ◽  
Arc Plasma ◽  
Faradaic Efficiency ◽  
Electro Deposition ◽  
Electro Catalysis ◽  
Reduction Of Co2

A composite of copper and gold nanoparticles was deposited using arc plasma deposition on the conductive FTO substrate for the electrochemical reduction of CO2 . The use of arc plasma deposition system allows the nanoparticles to be implanted onto the substrate as opposed to the commonly used methods of vacuum deposition or electro deposition. This unique structure reduced the CO2 to produce formic acid with up to 60% faradaic efficiency. Copper and gold nanoparticles have never previously been reported to produce formic acid with such high efficiency, suggesting that the co-deposition technique of implanted nanoparticles can provide an interesting future avenue in the field of electrochemical reduction of CO2 . The surface analysis of the electrodes is presented here along with potential dependent faradaic efficiency of the electro catalysis.

Thin-walled hollow Au–Cu nanostructures with high efficiency in electrochemical reduction of CO2 to CO

2018 ◽  
Vol 5 (7) ◽  
pp. 1524-1532 ◽  
Author(s):  
Jun-Hao Zhou ◽  
Da-Wei Lan ◽  
Sheng-Song Yang ◽  
Yu Guo ◽  
Kun Yuan ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
High Efficiency ◽  
Kirkendall Effect ◽  
Galvanic Replacement ◽  
Thin Walled ◽  
Reduction Of Co2 ◽  
Cu Nanostructures

Thin-walled hollow Au–Cu nanostructures were synthesized via galvanic replacement and the Kirkendall effect between copper and gold, and they showed high efficiency for electro-reduction of CO2 to CO.

scholarly journals Front Cover: Electrocatalytic and Photocatalytic Reduction of CO2 to CO by Cobalt(II) Tripodal Complexes: Low Overpotentials, High Efficiency and Selectivity (ChemSusChem 6/2018)

ChemSusChem ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 994-994
Author(s):  
Jia-Wei Wang ◽  
Hai-Hua Huang ◽  
Jia-Kai Sun ◽  
Ting Ouyang ◽  
Di-Chang Zhong ◽  
...  
Keyword(s):  
High Efficiency ◽  
Photocatalytic Reduction ◽  
Front Cover ◽  
Reduction Of Co2

scholarly journals Controlled Morphology of Porous Polyvinyl Butyral Nanofibers

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Daniela Lubasova ◽  
Lenka Martinova
Keyword(s):  
Applied Voltage ◽  
High Efficiency ◽  
Polymer Concentration ◽  
Polyvinyl Butyral ◽  
Solution Concentration ◽  
Solvent Mixture ◽  
Electrospinning Process ◽  
Filter Materials ◽  
One Step ◽  
Poor Solvent

A simple and effective method for the fabrication of porous nanofibers based on the solvent evaporation methods in one-step electrospinning process from the commercial polyvinyl butyral (PVB) is presented. The obtained nanofibers are prevalently amorphous with diameters ranging from 150 to 4350 nm and specific surface area of approximately 2–20 m2/g. Pore size with irregular shape of the porous PVB fibers ranged approximately from 50 to 200 nm. The effects of polymer solution concentration, composition of the solvents mixture, and applied voltage on fiber diameter and morphology were investigated. The theoretical approach for the choice of poor and good solvents for PVB was explained by the application Hansen solubility parameter (HSP) and two-dimensional graph. Three basic conditions for the production of porous PVB nanofibers were defined: (i) application of good/poor solvent mixture for spinning solution, (ii) differences of the evaporation rate between good/poor solvent, and (iii) correct ratios of good/poor solvent (v/v). The diameter of prepared porous PVB fibers decreased as the polymer concentration was lowered and with higher applied voltage. These nanofiber sheets with porous PVB fibers could be a good candidate for high-efficiency filter materials in comparison to smooth fibers without pores.

Electrocatalytic and Photocatalytic Reduction of CO2 to CO by Cobalt(II) Tripodal Complexes: Low Overpotentials, High Efficiency and Selectivity

ChemSusChem ◽  
2018 ◽  
Vol 11 (6) ◽  
pp. 1025-1031 ◽  
Author(s):  
Jia-Wei Wang ◽  
Hai-Hua Huang ◽  
Jia-Kai Sun ◽  
Ting Ouyang ◽  
Di-Chang Zhong ◽  
...  
Keyword(s):  
High Efficiency ◽  
Photocatalytic Reduction ◽  
Reduction Of Co2
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