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 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.

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.

High efficiency electrochemical reduction of CO2 beyond the two-electron transfer pathway on grain boundary rich ultra-small SnO2 nanoparticles

2018 ◽  
Vol 6 (22) ◽  
pp. 10313-10319 ◽  
Author(s):  
Chenglu Liang ◽  
Byoungsu Kim ◽  
Shize Yang ◽  
Yang Liu Yang Liu ◽  
Cristiano Francisco Woellner ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Grain Boundary ◽  
Electrochemical Reduction ◽  
High Efficiency ◽  
Sno2 Nanoparticles ◽  
Electron Transfer Pathway ◽  
Reduction Of Co2

Grain boundary rich ultra-small SnO2 nanoparticles exhibited high total FEs towards electrochemical reduction of CO2 with products beyond CO and HCOO−.

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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