Low Overpotential and High Current CO2 Reduction with Surface Reconstructed Cu Foam Electrodess

Handle URI:
http://hdl.handle.net/10754/614803
Title:
Low Overpotential and High Current CO2 Reduction with Surface Reconstructed Cu Foam Electrodess
Authors:
Min, Shixiong ( 0000-0001-6248-8804 ) ; Yang, Xiulin ( 0000-0003-2642-4963 ) ; Lu, Ang-Yu; Tseng, Chien-Chih ( 0000-0003-0676-5664 ) ; Hedhili, Mohamed N. ( 0000-0002-3624-036X ) ; Li, Lain-Jong ( 0000-0002-4059-7783 ) ; Huang, Kuo-Wei ( 0000-0003-1900-2658 )
Abstract:
While recent reports have demonstrated that oxide-derived Cu-based electrodes exhibit high selectivity for CO2 reduction at low overpotential, the low catalytic current density (<2 mA/cm2 at -0.45 V vs. RHE) still largely limits its applications for large-scale fuel synthesis. Here we report an extremely high current density for CO2 reduction at low overpotential using a Cu foam electrode prepared by air-oxidation and subsequent electroreduction. Apart from possessing three-dimensional (3D) open frameworks, the resulting Cu foam electrodes prepared at higher temperatures exhibit enhanced electrochemically active surface area and distinct surface structures. In particular, the Cu foam electrode prepared at 500 °C exhibits an extremely high geometric current density of ~9.4 mA/cm2 in CO2-satrurated 0.1 M KHCO3 aqueous solution and achieving ~39% CO and ~23% HCOOH Faradaic efficiencies at -0.45 V vs. RHE. The high activity and significant selectivity enhancement are attributable to the formation of abundant grain-boundary supported active sites and preferable (100) and (111) facets as a result of reconstruction of Cu surface facets. This work demonstrates that the structural integration of Cu foam with open 3D frameworks and the favorable surface structures is a promising strategy to develop an advanced Cu electrocatalyst that can operate at high current density and low overpotential for CO2 reduction.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Citation:
Low Overpotential and High Current CO2 Reduction with Surface Reconstructed Cu Foam Electrodess 2016 Nano Energy
Publisher:
Elsevier BV
Journal:
Nano Energy
Issue Date:
23-Jun-2016
DOI:
10.1016/j.nanoen.2016.06.043
Type:
Article
ISSN:
22112855
Sponsors:
We are grateful for the support from King Abdullah University of Science and Technology (KAUST) and the National Natural Science Foundation of China (grant no. 21463001).
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S2211285516302269
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorMin, Shixiongen
dc.contributor.authorYang, Xiulinen
dc.contributor.authorLu, Ang-Yuen
dc.contributor.authorTseng, Chien-Chihen
dc.contributor.authorHedhili, Mohamed N.en
dc.contributor.authorLi, Lain-Jongen
dc.contributor.authorHuang, Kuo-Weien
dc.date.accessioned2016-06-27T10:39:02Z-
dc.date.available2016-06-27T10:39:02Z-
dc.date.issued2016-06-23-
dc.identifier.citationLow Overpotential and High Current CO2 Reduction with Surface Reconstructed Cu Foam Electrodess 2016 Nano Energyen
dc.identifier.issn22112855-
dc.identifier.doi10.1016/j.nanoen.2016.06.043-
dc.identifier.urihttp://hdl.handle.net/10754/614803-
dc.description.abstractWhile recent reports have demonstrated that oxide-derived Cu-based electrodes exhibit high selectivity for CO2 reduction at low overpotential, the low catalytic current density (<2 mA/cm2 at -0.45 V vs. RHE) still largely limits its applications for large-scale fuel synthesis. Here we report an extremely high current density for CO2 reduction at low overpotential using a Cu foam electrode prepared by air-oxidation and subsequent electroreduction. Apart from possessing three-dimensional (3D) open frameworks, the resulting Cu foam electrodes prepared at higher temperatures exhibit enhanced electrochemically active surface area and distinct surface structures. In particular, the Cu foam electrode prepared at 500 °C exhibits an extremely high geometric current density of ~9.4 mA/cm2 in CO2-satrurated 0.1 M KHCO3 aqueous solution and achieving ~39% CO and ~23% HCOOH Faradaic efficiencies at -0.45 V vs. RHE. The high activity and significant selectivity enhancement are attributable to the formation of abundant grain-boundary supported active sites and preferable (100) and (111) facets as a result of reconstruction of Cu surface facets. This work demonstrates that the structural integration of Cu foam with open 3D frameworks and the favorable surface structures is a promising strategy to develop an advanced Cu electrocatalyst that can operate at high current density and low overpotential for CO2 reduction.en
dc.description.sponsorshipWe are grateful for the support from King Abdullah University of Science and Technology (KAUST) and the National Natural Science Foundation of China (grant no. 21463001).en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S2211285516302269en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Nano Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Nano Energy, 23 June 2016. DOI: 10.1016/j.nanoen.2016.06.043en
dc.subjectCO2 reductionen
dc.subjectCu foam electrodeen
dc.subjectSurface reconstructionen
dc.subjectHigh current densityen
dc.subjectLow overpotentialen
dc.titleLow Overpotential and High Current CO2 Reduction with Surface Reconstructed Cu Foam Electrodessen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalNano Energyen
dc.eprint.versionPost-printen
dc.contributor.institutionSchool of Chemistry and Chemical Engineering, Beifang University of Nationalities, Yinchuan, 750021, Chinaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorMin, Shixiongen
kaust.authorYang, Xiulinen
kaust.authorLu, Ang-Yuen
kaust.authorTseng, Chien-Chihen
kaust.authorHedhili, Mohamed N.en
kaust.authorLi, Lain-Jongen
kaust.authorHuang, Kuo-Weien
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