Carbon neutral electrochemical conversion of carbon dioxide mediated by [Mn+(cyclam)Cln] (M = Ni2+ and Co3+) on mercury free electrodes and ionic liquids as reaction media

2017 ◽  
Vol 19 (4) ◽  
pp. 1155-1162 ◽  
Author(s):  
J. Honores ◽  
D. Quezada ◽  
M. García ◽  
K. Calfumán ◽  
J. P. Muena ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Ionic Liquids ◽  
Faradaic Efficiency ◽  
Electrochemical Conversion ◽  
Carbon Neutral ◽  
Cyclam Complexes ◽  
Reaction Media

Carbon dioxide is reduced to carbon monoxide with high faradaic efficiency on mercury free electrodes using M(cyclam) complexes.

Ionic liquids and supercritical carbon dioxide: green and alternative reaction media for chemical processes

2016 ◽  
Vol 32 (6) ◽  
Author(s):  
Ruixia Liu ◽  
Peng Zhang ◽  
Suojiang Zhang ◽  
Ting Yan ◽  
Jiayu Xin ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquids ◽  
Supercritical Carbon Dioxide ◽  
Chemical Processes ◽  
Reaction Media ◽  
Supercritical Carbon

AbstractIonic liquids (ILs) and supercritical CO

Clam-shaped cyclam-functionalized porphyrin for electrochemical reduction of carbon dioxide

2019 ◽  
Vol 23 (04n05) ◽  
pp. 453-461
Author(s):  
Sumana Tawil ◽  
Hathaichanok Seelajaroen ◽  
Amorn Petsom ◽  
Niyazi Serdar Sariciftci ◽  
Patchanita Thamyongkit
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Cyclic Voltammetry ◽  
Catalytic Activity ◽  
Electrochemical Reduction ◽  
Target Compound ◽  
Faradaic Efficiency ◽  
Controlled Potential Electrolysis ◽  
Improved Stability ◽  
Controlled Potential

A clam-shaped molecule comprising a Zn(II)-porphyrin and a Zn(II)-cyclam is synthesized and characterized. Its electrochemical behavior and catalytic activity for homogeneous electrochemical reduction of carbon dioxide (CO[Formula: see text] are investigated by cyclic voltammetry and compared with those of Zn(II)-meso-tetraphenylporphyrin and Zn(II)-cyclam. Under N2-saturated conditions, cyclic voltammetry of the featured complex has characteristics of its two constituents, but under CO2-saturated conditions, the target compound exhibits significant current enhancement. Iterative reduction under electrochemical conditions indicated the target compound has improved stability relative to Zn(II)-cyclam. Controlled potential electrolysis demonstrates that, without addition of water, methane (CH[Formula: see text] is the only detectable product with 1% Faradaic efficiency (FE). The formation of CH4 is not observed under the catalysis of the Zn(II)-porphyrin benchmark compound, indicating that the CO2-capturing function of the Zn(II)-cyclam unit contributes to the catalysis. Upon addition of 3% v/v water, the electrochemical reduction of CO2 in the presence of the target compound gives carbon monoxide (CO) with 28% FE. Dominance of CO formation under these conditions suggests enhancement of proton-coupled reduction. Integrated action of these Zn(II)-porphyrin and Zn(II)-cyclam units offers a notable example of a molecular catalytic system where the cyclam ring captures and brings CO2 into the proximity of the porphyrin catalysis center.

Highly selective and stable electro-catalytic system with ionic liquids for the reduction of carbon dioxide to carbon monoxide

2015 ◽  
Vol 55 ◽  
pp. 43-46 ◽  
Author(s):  
Feng Zhou ◽  
Shimin Liu ◽  
Benqun Yang ◽  
Peixue Wang ◽  
Ahmad S. Alshammari ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Ionic Liquids ◽  
Catalytic System

scholarly journals Elucidation of the Roles of Ionic Liquid in CO2 Electrochemical Reduction to Value-Added Chemicals and Fuels

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6962
Author(s):  
Sulafa Abdalmageed Saadaldeen Mohammed ◽  
Wan Zaireen Nisa Yahya ◽  
Mohamad Azmi Bustam ◽  
Md Golam Kibria
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquids ◽  
Reaction Mechanism ◽  
Electrochemical Reduction ◽  
Value Added ◽  
Faradaic Efficiency ◽  
Renewable Source ◽  
Carbon Dioxide Co2 ◽  
Physical And Chemical ◽  
Value Added Products

The electrochemical reduction of carbon dioxide (CO2ER) is amongst one the most promising technologies to reduce greenhouse gas emissions since carbon dioxide (CO2) can be converted to value-added products. Moreover, the possibility of using a renewable source of energy makes this process environmentally compelling. CO2ER in ionic liquids (ILs) has recently attracted attention due to its unique properties in reducing overpotential and raising faradaic efficiency. The current literature on CO2ER mainly reports on the effect of structures, physical and chemical interactions, acidity, and the electrode–electrolyte interface region on the reaction mechanism. However, in this work, new insights are presented for the CO2ER reaction mechanism that are based on the molecular interactions of the ILs and their physicochemical properties. This new insight will open possibilities for the utilization of new types of ionic liquids. Additionally, the roles of anions, cations, and the electrodes in the CO2ER reactions are also reviewed.

Highly selective electrocatalytic reduction of carbon dioxide to carbon monoxide on silver electrode with aqueous ionic liquids

2014 ◽  
Vol 46 ◽  
pp. 103-106 ◽  
Author(s):  
Feng Zhou ◽  
Shimin Liu ◽  
Benqun Yang ◽  
Peixue Wang ◽  
Ahmad S. Alshammari ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Ionic Liquids ◽  
Silver Electrode ◽  
Electrocatalytic Reduction

Ruthenium-Catalyzed Hydroformylation of Alkenes by using Carbon Dioxide as the Carbon Monoxide Source in the Presence of Ionic Liquids

ChemCatChem ◽  
2014 ◽  
Vol 6 (8) ◽  
pp. 2224-2228 ◽  
Author(s):  
Meher Ali ◽  
Aitor Gual ◽  
Günter Ebeling ◽  
Jairton Dupont
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Ionic Liquids

Alternatives to Phosgene and Carbon Monoxide: Synthesis of Symmetric Urea Derivatives with Carbon Dioxide in Ionic Liquids.

ChemInform ◽  
2003 ◽  
Vol 34 (44) ◽  
Author(s):  
Feng Shi ◽  
Youquan Deng ◽  
Tianlong SiMa ◽  
Jiajian Peng ◽  
Yanlong Gu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Ionic Liquids ◽  
Urea Derivatives

A Local Proton Source Enhances CO2Electroreduction to CO by a Molecular Fe Catalyst

Science ◽  
2012 ◽  
Vol 338 (6103) ◽  
pp. 90-94 ◽  
Author(s):  
Cyrille Costentin ◽  
Samuel Drouet ◽  
Marc Robert ◽  
Jean-Michel Savéant
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Greenhouse Gas ◽  
Phenolic Hydroxyl ◽  
Local Concentration ◽  
Electrochemical Conversion ◽  
Fe Catalyst ◽  
Proton Source ◽  
Commodity Chemicals ◽  
Earth Abundant

Electrochemical conversion of carbon dioxide (CO2) to carbon monoxide (CO) is a potentially useful step in the desirable transformation of the greenhouse gas to fuels and commodity chemicals. We have found that modification of iron tetraphenylporphyrin through the introduction of phenolic groups in all ortho and ortho′ positions of the phenyl groups considerably speeds up catalysis of this reaction by the electrogenerated iron(0) complex. The catalyst, which uses one of the most earth-abundant metals, manifests a CO faradaic yield above 90% through 50 million turnovers over 4 hours of electrolysis at low overpotential (0.465 volt), with no observed degradation. The basis for the enhanced activity appears to be the high local concentration of protons associated with the phenolic hydroxyl substituents.

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