Surface and length effects for aqueous electrochemical reduction of CO2 as studied over copper nanowire arrays

2020 ◽  
Vol 144 ◽  
pp. 109507
Author(s):  
Yuanxing Wang ◽  
Yachuan Zhu ◽  
Cailing Niu
Keyword(s):  
Electrochemical Reduction ◽  
Nanowire Arrays ◽  
Copper Nanowire ◽  
Reduction Of Co2 ◽  
Length Effects

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>

Electrochemical Reduction of CO2 to CO in Organic Electrolyte with HCl Oxidized to Cl2 on Anode for Phosgene Synthesis

2021 ◽  
pp. 138728
Author(s):  
Chaojuan Li ◽  
Jin Shi ◽  
Jianxiong Liu ◽  
Yajian Duan ◽  
Yaxin Hua ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Organic Electrolyte ◽  
Reduction Of Co2
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