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

Wang, Yuanxing; Zhu, Yachuan; Niu, Cailing

doi:10.1016/j.jpcs.2020.109507

Cited by 12 publications

(9 citation statements)

References 34 publications

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“…The XRD pattern of the OD-Cu NAs presents the same peaks of cubic Cu as the Cu mesh, despite a weak Cu 2 O peak at 36–37 o . This small amount of Cu 2 O may suggest that some grain boundaries (GBs) exist in the OD-Cu NAs because GBs can promote the re-oxidation of Cu. , The substantial change in the XRD patterns indicated that CuO x NAs-42 C/cm 2 is composed of a mixture of metallic Cu, Cu 2 O, and CuO, while the OD-Cu NAs consist mainly of metallic Cu. Similar XRD patterns were observed for other levels of nonfully reduced CuO x NAs (i.e., σ = 15, 25, and 57 C/cm 2 ) and accordingly electrochemically reduced OD-Cu NAs, as shown in Figures S6 and S7.…”

Section: Resultsmentioning

confidence: 99%

“…25,26 In the later studies, surface treatments showed an influence on the selectivity and activity of OD-Cu catalysts for ECR. 27,28 Compared to bulk materials, nanowires (NWs), onedimensional materials, usually possess higher surface areas leading to higher activity for ECR. 25,29 Herein, we report the synthesis of OD-Cu nanowire arrays (NAs) by controlled reduction treatment as electrocatalysts for CO 2 reduction.…”

Section: Introductionmentioning

confidence: 99%

“…As an earth-abundant element, copper (Cu) is one of the most studied materials for ECR. − However, Cu electrodes normally hold high overpotentials and poor product selectivities for ECR . Recently, oxide-derived (OD) Cu catalysts exhibited enhanced performance for ECR. , In the later studies, surface treatments showed an influence on the selectivity and activity of OD-Cu catalysts for ECR. , …”

Section: Introductionmentioning

confidence: 99%

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Tunable Syngas Formation from Electrochemical CO₂ Reduction on Copper Nanowire Arrays

Wang

Niu

Zhu

et al. 2020

ACS Appl. Energy Mater.

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Producing syngas from electrochemical reduction of CO 2 by renewable energy offers an opportunity to reduce CO 2 emissions and provide chemicals and fuels. Herein, we report the careful manipulation of the reduction treatment to synthesize copper nanowire arrays (Cu NAs). By thermal oxidation, copper oxide nanowires were grown on a Cu mesh. Then, thermal reduction and electrochemical reduction were used to reduce copper oxide to Cu with the morphologic features largely preserved. The derived Cu NAs are cost-effective electrocatalysts capable of reducing CO 2 and H 2 O for tunable syngas production. It is demonstrated that syngas, the mixture of H 2 and CO, could be attained with a wide range of compositions (from 1:2 to 3:1) from CO 2 reduction and H 2 O reduction on these Cu NAs in aqueous solutions. In addition, Cu NAs show a high current density, 4 mA/cm 2 , at a low potential, −0.5 V, with a high syngas faradaic efficiency of over 70%. This approach explores a new method that sheds light on tuning the syngas composition from the electrochemical CO 2 reduction by Cu-based catalysts.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tunable Syngas Formation from Electrochemical CO₂ Reduction on Copper Nanowire Arrays

Wang

Niu

Zhu

et al. 2020

ACS Appl. Energy Mater.

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“…More recently, Wang and co-workers highlighted the correlation between the catalytic activity of CuNWs and their length in the range of 4.6-13 μm. 49 The density of surface defects in terms of grain-boundaries has been also exploited to enhance the catalytic performance of CuNWs. In 2020, Goddard III, Huang and coworkers reported the electrochemical post-treatment of chemically synthesized CuNWs, enabling impressive selectivity towards C 2 products by suppressing the C 1 pathway.…”

Section: Electrocatalytic Properties Of Cunws and Their Alloysmentioning

confidence: 99%

Copper and silver nanowires for CO₂ electroreduction

et al. 2023

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“…This work is different from previously published works using nanowire substrates, [44][45] where researchers employed substrates with multiple nanowires. These electrodes experience serious mass transport issues, especially at large overpotentials.…”

Section: Universality Of the Conceptmentioning

confidence: 61%

Micro‐Electrode with Fast Mass Transport for Enhancing Selectivity of Carbonaceous Products in Electrochemical CO₂ Reduction

Zhang¹,

Ren

Pan³

et al. 2021

Adv Funct Materials

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During electrochemical carbon dioxide (CO 2 ) reduction on copper electrodes in an aqueous electrolyte, one of the key challenges is the competition between hydrogen evolution and CO 2 reduction, especially under large current density. Here, micro-electrodes are designed with a copper wire as the substrate, which shows improved mass transport compared to the planar electrode. The Faradaic efficiency for C 2+ products reaches 79% with a partial geometric current density −77.7 mA cm −2 on Cu 2 O nanowire/micro-electrode, which is 3.7 times higher than Cu 2 O nanowire/planar-electrode. The authors also designed CuO and metallic Cu with micro-electrode as substrate and observed enhanced selectivity for carbonaceous products, proving the universality of the concept. The improved activity is attributed to the fast mass transport of CO 2 to the catalytic interface and thus the suppression of hydrogen production.

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

Cited by 12 publications

References 34 publications

Tunable Syngas Formation from Electrochemical CO₂ Reduction on Copper Nanowire Arrays

Tunable Syngas Formation from Electrochemical CO₂ Reduction on Copper Nanowire Arrays

Copper and silver nanowires for CO₂ electroreduction

Micro‐Electrode with Fast Mass Transport for Enhancing Selectivity of Carbonaceous Products in Electrochemical CO₂ Reduction

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

Cited by 12 publications

References 34 publications

Tunable Syngas Formation from Electrochemical CO2 Reduction on Copper Nanowire Arrays

Tunable Syngas Formation from Electrochemical CO2 Reduction on Copper Nanowire Arrays

Copper and silver nanowires for CO2 electroreduction

Micro‐Electrode with Fast Mass Transport for Enhancing Selectivity of Carbonaceous Products in Electrochemical CO2 Reduction

Contact Info

Product

Resources

About

Tunable Syngas Formation from Electrochemical CO₂ Reduction on Copper Nanowire Arrays

Tunable Syngas Formation from Electrochemical CO₂ Reduction on Copper Nanowire Arrays

Copper and silver nanowires for CO₂ electroreduction

Micro‐Electrode with Fast Mass Transport for Enhancing Selectivity of Carbonaceous Products in Electrochemical CO₂ Reduction