Potential and pH dependent pseudocapacitance of Mo/Mo oxides - An impedance study
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Saji, Viswanathan S. | - |
dc.contributor.author | Lee, Chi-Woo | - |
dc.date.accessioned | 2021-09-05T06:10:32Z | - |
dc.date.available | 2021-09-05T06:10:32Z | - |
dc.date.created | 2021-06-15 | - |
dc.date.issued | 2014-08-10 | - |
dc.identifier.issn | 0013-4686 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/97696 | - |
dc.description.abstract | Pseudocapacitance (C-p) of molybdenum with thin passive surface oxides was assessed over a wide potential (E) window (-0.05 to -1.0V vs. Ag/AgCl) at various pH levels in 0.6 M Na2SO4 by means of impedance spectroscopy. The E and pH - dependent variation of C-p was correlated with the surface oxides' stability and H+/Na+ surface/near-surface reversible redox processes. C-p showed a rapid increase in acidic solutions from -0.05 to similar to -0.55V owing to the H+ electrosorption/intercalation which was followed by a sharp decrease in the hydrogen evolution region. A rise in C-p at E < similar to -0.80V was suggested to be associated with either a strong involvement of water at the interface and/or a continuous ingression of Na+ to the porous surface oxides. In neutral and basic electrolytes, the E - dependent C-p remained to be high without a marked maximum. An associated high oxide film resistance indicated that the thermodynamic instability of the surface oxides in neutral/basic electrolytes resulted in an outer dissolute-product's layer, and that the Na+ electrosorption/intercalation occurred primarily with an inner layer of stable surface oxides. Also presented was a minimum potential in the C-p vs. E plot, whose variation was correlated with the open circuit potential. (C) 2014 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | NANOSTRUCTURED MOLYBDENUM OXIDE | - |
dc.subject | ELECTROCHEMICAL ENERGY-STORAGE | - |
dc.subject | DIFFERENTIAL CAPACITANCE | - |
dc.subject | DOUBLE-LAYER | - |
dc.subject | BEHAVIOR | - |
dc.subject | PASSIVATION | - |
dc.subject | LIQUIDS | - |
dc.subject | ANIONS | - |
dc.title | Potential and pH dependent pseudocapacitance of Mo/Mo oxides - An impedance study | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Chi-Woo | - |
dc.identifier.doi | 10.1016/j.electacta.2014.06.092 | - |
dc.identifier.scopusid | 2-s2.0-84903832619 | - |
dc.identifier.wosid | 000341462500081 | - |
dc.identifier.bibliographicCitation | ELECTROCHIMICA ACTA, v.137, pp.647 - 653 | - |
dc.relation.isPartOf | ELECTROCHIMICA ACTA | - |
dc.citation.title | ELECTROCHIMICA ACTA | - |
dc.citation.volume | 137 | - |
dc.citation.startPage | 647 | - |
dc.citation.endPage | 653 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Electrochemistry | - |
dc.relation.journalWebOfScienceCategory | Electrochemistry | - |
dc.subject.keywordPlus | NANOSTRUCTURED MOLYBDENUM OXIDE | - |
dc.subject.keywordPlus | ELECTROCHEMICAL ENERGY-STORAGE | - |
dc.subject.keywordPlus | DIFFERENTIAL CAPACITANCE | - |
dc.subject.keywordPlus | DOUBLE-LAYER | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | PASSIVATION | - |
dc.subject.keywordPlus | LIQUIDS | - |
dc.subject.keywordPlus | ANIONS | - |
dc.subject.keywordAuthor | Molybdenum | - |
dc.subject.keywordAuthor | Surface molybdenum oxides | - |
dc.subject.keywordAuthor | Pseudocapacitance | - |
dc.subject.keywordAuthor | Capacitance minimum potential | - |
dc.subject.keywordAuthor | Impedance spectroscopy | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.