Iron Sulphur Cluster [Fe4S4(SPh)4]2– Catalyzed Electrochemical Reduction of CO2 on Carbon Electrodes in [Bu4N][BF4]-DMF Mixture

2020 ◽  
Vol 16 (7) ◽  
pp. 854-862
Author(s):  
Khalaf M. Alenezi
Keyword(s):  
Co2 Reduction ◽  
Inorganic Materials ◽  
Vitreous Carbon ◽  
Carbon Electrode ◽  
Electrocatalytic Reduction ◽  
Reaction Conditions ◽  
Reduction Activity ◽  
Co Conversion ◽  
Carbon Dioxide Co2 ◽  
Reduction Of Co2

Background: An efficient, selective and durable electrocatalytic carbon dioxide (CO2) reduction system is a prerequisite to tackle energy and pollution-related issues. In this context, both organic and inorganic materials have gained a significant interest worldwide. Objective: In the present work, the electrocatalytic reduction activity of an iron-sulphur (Fe-S) cluster, [Fe4S4(SPh)4]2– for CO2 → carbon monoxide (CO) conversion has been investigated. The effect of catalyst concentration on the yield of CO and H2 was determined. Besides, the influence of reaction conditions (presence or absence of a Brønsted acid, electrolysis time etc.) on faradaic yield and product selectivity was also investigated. Methods: Cyclic voltammetry (CV) was carried out on vitreous carbon electrode in 0.1 M [Bu4N] [BF4]-DMF electrolyte. At the end of electrolysis, products were collected by tight-gas syringe and analyzed by gas chromatography (GC) system coupled with a thermal conductivity detector. Results: The Fe-S cluster was found to efficiently catalyse the process on carbon electrode in 0.1 M [Bu4N][BF4]-DMF electrolyte. Moreover, the presence of cluster shifted the reduction potential by ~ 200 mV towards the positive. GC analysis confirmed the formation of CO with a current efficiency of ca. 70%. On the other hand, 12% H2 was observed at the end of electrocatalysis. Conclusion: In summary, Fe-S cluster was used for the electrocatalytic reduction of CO2 in 0.1 M [Bu4N][BF4]-DMF electrolyte. The use of cluster (catalyst) was found to be important for CO2 reduction as no CO was detected in the absence of the catalyst. This study highlights the potential application of Fe-S cluster for CO2 reduction.

scholarly journals Stabilization Effects in Binary Colloidal Cu and Ag Nanoparticle Electrodes under Electrochemical CO2 Reduction Conditions

Nanoscale ◽  
2021 ◽  
Author(s):  
Longfei Wu ◽  
Kees Kolmeijer ◽  
Yue Zhang ◽  
Hongyu An ◽  
Sven Arnouts ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reaction ◽  
Co2 Reduction ◽  
Modified Electrodes ◽  
Ag Nanoparticle ◽  
Reaction Conditions ◽  
Electrochemical Co2 Reduction ◽  
Carbon Dioxide Co2 ◽  
Reduction Catalysts ◽  
Sintering Processes

Nanoparticle modified electrodes constitute an attractive way to tailor-make efficient carbon dioxide (CO2) reduction catalysts. However, the restructuring and sintering processes of nanoparticles under electrochemical reaction conditions not only impedes...

scholarly journals ENVIRONMENTAL BENEFITS FROM CO2 REDUCTION, DUE TO MODAL REPLACEMENT: CASE STUDY ON LIGHT RAIL VEHICLE IN BRASILIA CITY

2016 ◽  
Author(s):  
Paulo Henrique da Silva Costa ◽  
Leisy Mikaelly Alves Teixeira ◽  
Janaína Cardoso Pinheiro ◽  
Fabiana Serra Arruda ◽  
Augusto César de Mendonça Brasil
Keyword(s):  
Co2 Emissions ◽  
Co2 Reduction ◽  
Federal District ◽  
Environmental Benefits ◽  
Light Rail ◽  
Rail Vehicle ◽  
Private And Public ◽  
Carbon Dioxide Co2 ◽  
Reduction Of Co2

This work aims to measure the reduction of Carbon Dioxide (CO2) emissions in atmosphere by replacing the modal urban bus by Light Rail Vehicle (VLT). In order to accomplish this objective, a case study in Brasilia, Federal District, in the stretch of VLT which passes on Via W-3 South was conducted. The Theory of Externalities that discusses the right to ownership of private and public goods and responsibilities about the positive and negative externalities caused by the agents and individuals of society was used to support the analyses. It was used the Top-Down method, which allowed the calculation the direct emissions of CO2. The values obtained on the reduction of CO2 emissions were converted into values of carbon credits as a way to economically measure such reductions.  The results showed a significant reduction in CO2 emissions per year and consequent environmental benefit.DOI: http://dx.doi.org/10.4995/CIT2016.2016.3480 

scholarly journals Recent Advances in TiO2-Based Photocatalysts for Reduction of CO2 to Fuels

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 337 ◽  
Author(s):  
Thang Phan Nguyen ◽  
Dang Le Tri Nguyen ◽  
Van-Huy Nguyen ◽  
Thu-Ha Le ◽  
Dai-Viet N. Vo ◽  
...  
Keyword(s):  
Co2 Reduction ◽  
Co2 Gas ◽  
Tio2 Photocatalysts ◽  
Efficient Suppression ◽  
Excellent Photocatalytic Activity ◽  
Photocatalytic Reactions ◽  
Carbon Dioxide Co2 ◽  
Reduction Of Co2 ◽  
Made In ◽  
Working Mechanisms

Titanium dioxide (TiO2) has attracted increasing attention as a candidate for the photocatalytic reduction of carbon dioxide (CO2) to convert anthropogenic CO2 gas into fuels combined with storage of intermittent and renewable solar energy in forms of chemical bonds for closing the carbon cycle. However, pristine TiO2 possesses a large band gap (3.2 eV), fast recombination of electrons and holes, and low selectivity for the photoreduction of CO2. Recently, considerable progress has been made in the improvement of the performance of TiO2 photocatalysts for CO2 reduction. In this review, we first discuss the fundamentals of and challenges in CO2 photoreduction on TiO2-based catalysts. Next, the recently emerging progress and advances in TiO2 nanostructured and hybrid materials for overcoming the mentioned obstacles to achieve high light-harvesting capability, improved adsorption and activation of CO2, excellent photocatalytic activity, the ability to impede the recombination of electrons-holes pairs, and efficient suppression of hydrogen evolution are discussed. In addition, approaches and strategies for improvements in TiO2-based photocatalysts and their working mechanisms are thoroughly summarized and analyzed. Lastly, the current challenges and prospects of CO2 photocatalytic reactions on TiO2-based catalysts are also presented.

scholarly journals Selective electrochemical reduction of CO2 to CO with a cobalt chlorin complex adsorbed on multi-walled carbon nanotubes in water

2015 ◽  
Vol 51 (50) ◽  
pp. 10226-10228 ◽  
Author(s):  
Shoko Aoi ◽  
Kentaro Mase ◽  
Kei Ohkubo ◽  
Shunichi Fukuzumi
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Reduction ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Electrocatalytic Reduction ◽  
Multi Walled Carbon Nanotubes ◽  
Reduction Of Co2 ◽  
Walled Carbon Nanotubes

Selective electrocatalytic reduction of CO2 to CO occurred efficiently using a glassy carbon electrode modified with a cobalt(ii) chlorin complex adsorbed on multi-walled carbon nanotubes in water.

scholarly journals Tuning Sn-Cu Catalysis for Electrochemical Reduction of CO2 on Partially Reduced Oxides SnOx-CuOx-Modified Cu Electrodes

Catalysts ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 476 ◽  
Author(s):  
Qianwen Li ◽  
Mei Li ◽  
Shengbo Zhang ◽  
Xiao Liu ◽  
Xinli Zhu ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Surface Composition ◽  
Co2 Reduction ◽  
Catalytic Performance ◽  
Faradaic Efficiency ◽  
Synergistic Catalysis ◽  
Reduction Activity ◽  
Annealing Step ◽  
Reduction Of Co2 ◽  
Cu Foam

Copper-based bimetallic catalysts have been recently showing promising performance for the selective electrochemical reduction of CO2. In this work, we successfully fabricated the partially reduced oxides SnOx, CuOxmodified Cu foam electrode (A-Cu/SnO2) through an electrodeposition-annealing-electroreduction approach. Notably, in comparison with the control electrode (Cu/SnO2) without undergoing annealing step, A-Cu/SnO2 exhibits a significant enhancement in terms of CO2 reduction activity and CO selectivity. By investigating the effect of the amount of the electrodeposited SnO2, it is found that A-Cu/SnO2 electrodes present the characteristic Sn-Cu synergistic catalysis with a feature of dominant CO formation (CO faradaic efficiency, 70~75%), the least HCOOH formation (HCOOH faradaic efficiency, <5%) and the remarkable inhibition of hydrogen evolution reaction. In contrast, Cu/SnO2 electrodes exhibit a SnO2 coverage-dependent catalysis—a shift from CO selectivity to HCOOH selectivity with the increasing deposited SnO2 on Cu foam. The different catalytic performance between Cu/SnO2 and A-Cu/SnO2 might be attributed to the different content of Cu atoms in SnO2 layer, which may affect the density of Cu-Sn interface on the surface. Our work provides a facile annealing-electroreduction strategy to modify the surface composition for understanding the metal effect towards CO2 reduction activity and selectivity for bimetallic Cu-based electrocatalysts.

Graphene Supported Tungsten Carbide as Catalyst for Electrochemical Reduction of CO2

2019 ◽  
Author(s):  
Sahithi Ananthaneni ◽  
Rees Rankin
Keyword(s):  
Tungsten Carbide ◽  
Electrochemical Reduction ◽  
Low Cost ◽  
Co2 Reduction ◽  
Platinum Group Metal ◽  
Reduction Reaction ◽  
Metal Carbides ◽  
Depth Study ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction

<div>Electrochemical reduction of CO2 to useful chemical and fuels in an energy efficient way is currently an expensive and inefficient process. Recently, low-cost transition metal-carbides (TMCs) are proven to exhibit similar electronic structure similarities to Platinum-Group-Metal (PGM) catalysts and hence can be good substitutes for some important reduction reactions. In this work, we test graphenesupported WC (Tungsten Carbide) nanocluster as an electrocatalyst for the CO2 reduction reaction. Specifically, we perform DFT studies to understand various possible reaction mechanisms and determine the lowest thermodynamic energy landscape of CO2 reduction to various products such as CO, HCOOH, CH3OH, and CH4. This in-depth study of reaction energetics could lead to improvements and develop more efficient electrocatalysts for CO2 reduction.<br></div>

Three-dimensional porous copper-decorated bismuth-based nanofoam for boosting electrochemical reduction of CO2 to formate

2021 ◽  
Author(s):  
Yingchun Zhang ◽  
Changsheng Cao ◽  
Xintao Wu ◽  
Qi-Long Zhu
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Three Dimensional ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
High Current ◽  
Porous Copper ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction ◽  
Wide Potential

Bismuth (Bi)-based nanomaterials are considered as the promising electrocatalysts for electrocatalytic CO2 reduction reaction (CO2RR), but it is challenging to achieve high current density and selectivity in a wide potential...

Sign in / Sign up

Export Citation Format

Share Document