Synergistic Carbon and Hydrogen Reactions in Electrochemical Reduction of CO2 to Liquid Fuels

2021 ◽  
Author(s):  
Jinxian Feng ◽  
Jun Ni ◽  
Hui Pan
Keyword(s):  
Greenhouse Gas ◽  
Electrochemical Reduction ◽  
Reduction Reaction ◽  
Liquid Fuels ◽  
Reduction Of Co2 ◽  
Hydrogen Reactions

Electrochemical reduction reaction for the conversion of CO2 to liquid fuels in aqueous condition (e-CO2RR-lf) is one of the promising methods to convert the greenhouse gas into easy-storage fuels. Unfortunately,...

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>

scholarly journals Graphene Supported Tungsten Carbide as Catalyst for Electrochemical Reduction of CO2

Catalysts ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 604
Author(s):  
Sahithi Ananthaneni ◽  
Zachery Smith ◽  
Rees B. Rankin
Keyword(s):  
Tungsten Carbide ◽  
Electrochemical Reduction ◽  
Density Functional ◽  
Low Cost ◽  
Co2 Reduction ◽  
Platinum Group Metal ◽  
Reduction Reaction ◽  
Depth Study ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction

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) have been 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 graphene-supported WC (Tungsten Carbide) nanoclusters as an electrocatalyst for the CO2 reduction reaction. Specifically, we perform density functional theory (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 development of more efficient electrocatalysts for CO2 reduction.

scholarly journals The life-cycle environmental performance of producing formate via electrochemical reduction of CO2 in ionic liquid

2021 ◽  
Author(s):  
Andrea Paulillo ◽  
Martina Pucciarelli ◽  
Fabio Grimaldi ◽  
Paola Lettieri
Keyword(s):  
Climate Change ◽  
Ionic Liquid ◽  
Life Cycle ◽  
Greenhouse Gas ◽  
Electrochemical Reduction ◽  
Carbon Emissions ◽  
Environmental Performance ◽  
Carbon Capture ◽  
Mitigate Climate Change ◽  
Reduction Of Co2

Carbon capture and utilisation provide a means to mitigate climate change caused by anthropogenic greenhouse gas emissions by delaying carbon emissions via temporary storage in goods. This article presents a...

Electropolymerized Metal-Protoporphyrin electrodes for Selective Electrochemical Reduction of CO2

2021 ◽  
Author(s):  
Nael Yasri ◽  
Tareq Al-Attas ◽  
Jinguang Hu ◽  
Md Golam Kibria
Keyword(s):  
Electrochemical Reduction ◽  
Aqueous Media ◽  
Co2 Reduction ◽  
Reduction Reaction ◽  
Practical Implementation ◽  
Electrochemical Co2 Reduction ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction

Developing catalysts that exhibit high efficiencies for the electrochemical CO2 reduction reaction (CO2RR) in aqueous media is vital in both aspects of the healthier environment and for the practical implementation...

scholarly journals Recent Advances in the Catalyst Design and Mass Transport Control for the Electrochemical Reduction of Carbon Dioxide to Formate

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 859 ◽  
Author(s):  
Muhammad Alfath ◽  
Chan Woo Lee
Keyword(s):  
Mass Transport ◽  
Electrochemical Reduction ◽  
Active Sites ◽  
Co2 Reduction ◽  
Aqueous Solubility ◽  
Reduction Reaction ◽  
Catalyst Design ◽  
Catalyst Composition ◽  
Reduction Of Co2 ◽  
Formate Production

Closing the carbon cycle by the electrochemical reduction of CO2 to formic acid and other high-value chemicals is a promising strategy to mitigate rapid climate change. The main barriers to commercializing a CO2 reduction reaction (CO2RR) system for formate production are the chemical inertness, low aqueous solubility, and slow mass transport characteristics of CO2, along with the low selectivity and high overpotential observed in formate production via CO2 reduction. To address those problems, we first explain the possible reaction mechanisms of CO2RRs to formate, and then we present and discuss several strategies to overcome the barriers to commercialization. The electronic structure of the catalyst can be tuned to favor a specific intermediate by adjusting the catalyst composition and tailoring the facets, edges, and corners of the catalyst to better expose the active sites, which has primarily led to increased catalytic activity and selectivity. Controlling the local pH, employing a high-pressure reactor, and using systems with three-phase boundaries can tune the mass transport properties of reactants at the catalyst surface. The reported electrocatalytic performances are summarized afterward to provide insight into which strategies have critical effects on the production of formate.

Electrochemical approaches to alleviation of the problem of carbon dioxide accumulation

2001 ◽  
Vol 73 (12) ◽  
pp. 1917-1927 ◽  
Author(s):  
C. M. Sánchez-Sánchez ◽  
V. Montiel ◽  
D. A. Tryk ◽  
A. Aldaz ◽  
A. Fujishima
Keyword(s):  
Carbon Dioxide ◽  
Energy Efficiency ◽  
Greenhouse Gas ◽  
Electrochemical Reduction ◽  
Synthesis Gas ◽  
Gas Diffusion ◽  
Good Energy ◽  
Oxygen Gas ◽  
Carbon Dioxide Accumulation ◽  
Reduction Of Co2

The electrochemical reduction of CO2, which includes a number of different specific approaches, may show promise as a means to help slow down the accumulation of this greenhouse gas in the atmosphere. Two types of approaches are examined briefly here. First, CO2 can be used as a reagent in the electrocarboxylation reaction to produce organic carboxylic acids, for example, the pharmaceutical ibuprofen. Second, CO2 can be converted to a fuel, either directly or via synthesis gas. The latter can be produced with reasonably good energy efficiency in a gas-diffusion, electrode-based cell even at present with existing electrocatalysts. Oxygen gas is produced as a by-product. Further work is needed to improve the selectivity and efficiency in this and other approaches.

Imidazolium functionalized polymers for effective electrochemical reduction of CO2

2021 ◽  
Vol 41 (3) ◽  
pp. 211-217
Author(s):  
Abhishek Kumar ◽  
Leela Manohar Aeshala
Keyword(s):  
Electrochemical Reduction ◽  
Functional Groups ◽  
Reduction Reaction ◽  
Solid Polymer ◽  
Faradaic Efficiency ◽  
Green Fuels ◽  
Reduction Of Co2 ◽  
New Research ◽  
First Time ◽  
Modified Functional

Abstract Imidazolium functionalized polymer electrolytes for the electrochemical reduction of gaseous CO2 (ERGC) were studied for the first time in a developed reactor at room temperature and atmospheric pressure. It was found that reaction environment favors the CO2 reduction reaction by overcoming the mass transfer of CO2 with the use of imidazolium fixed functional groups. The selectivity and Faradaic efficiency of products formed during ERGC is enhanced due to the modified functional groups in the solid polymer matrix. This work may open up new research opportunities for the conversion of gaseous CO2 to green fuels.

scholarly journals Copper–Silver Bimetallic Nanowire Arrays for Electrochemical Reduction of Carbon Dioxide

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 173 ◽  
Author(s):  
Yuanxing Wang ◽  
Cailing Niu ◽  
Yachuan Zhu
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reduction ◽  
Co2 Reduction ◽  
Ambient Air ◽  
Catalytic Performance ◽  
Nanowire Arrays ◽  
Liquid Fuels ◽  
Galvanic Replacement ◽  
Cu Nanowires ◽  
Reduction Of Co2

The electrochemical conversion of carbon dioxide (CO2) into gaseous or liquid fuels has the potential to store renewable energies and reduce carbon emissions. Here, we report a three-step synthesis using Cu–Ag bimetallic nanowire arrays as catalysts for electrochemical reduction of CO2. CuO/Cu2O nanowires were first grown by thermal oxidation of copper mesh in ambient air and then reduced by annealing in the presence of hydrogen to form Cu nanowires. Cu–Ag bimetallic nanowires were then produced via galvanic replacement between Cu nanowires and the Ag+ precursor. The Cu–Ag nanowires showed enhanced catalytic performance over Cu nanowires for electrochemical reduction of CO2, which could be ascribed to the incorporation of Ag into Cu nanowires leading to suppression of hydrogen evolution. Our work provides a method for tuning the selectivity of copper nanocatalysts for CO2 reduction by controlling their composition.

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>

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