Simplifying the evaluation of graphene modified electrode performance using rotating disk electrode voltammetry.
Identifieur interne : 000A79 ( Main/Exploration ); précédent : 000A78; suivant : 000A80Simplifying the evaluation of graphene modified electrode performance using rotating disk electrode voltammetry.
Auteurs : RBID : pubmed:22352793Abstract
Graphene modified electrodes have been fabricated by electrodeposition from an aqueous graphene oxide solution onto conducting Pt, Au, glassy carbon, and indium tin dioxide substrates. Detailed investigations of the electrochemistry of the [Ru(NH(3))(6)](3+/2+) and [Fe(CN)(6)](3-/4-) and hydroquinone and uric acid oxidation processes have been undertaken at glassy carbon and graphene modified glassy carbon electrodes using transient cyclic voltammetry at a stationary electrode and near steady-state voltammetry at a rotating disk electrode. Comparisons of the data with simulation suggest that the transient voltammetric characteristics at graphene modified electrodes contain a significant contribution from thin layer and surface confined processes. Consequently, interpretations based solely on mass transport by semi-infinite linear diffusion may result in incorrect conclusions on the activity of the graphene modified electrode. In contrast, steady-state voltammetry at a rotating disk electrode affords a much simpler method for the evaluation of the performance of graphene modified electrode since the relative importance of the thin layer and surface confined processes are substantially diminished and mass transport is dominated by convection. Application of the rotated electrode approach with carbon nanotube modified electrodes also should lead to simplification of data analysis in this environment.
DOI: 10.1021/la205013n
PubMed: 22352793
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Simplifying the evaluation of graphene modified electrode performance using rotating disk electrode voltammetry.</title><author><name sortKey="Guo, Si Xuan" uniqKey="Guo S">Si-Xuan Guo</name><affiliation wicri:level="1"><nlm:affiliation>School of Chemistry, Monash University, Clayton, Vic 3800, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>School of Chemistry, Monash University, Clayton, Vic 3800</wicri:regionArea></affiliation></author><author><name sortKey="Zhao, Shu Feng" uniqKey="Zhao S">Shu-Feng Zhao</name></author><author><name sortKey="Bond, Alan M" uniqKey="Bond A">Alan M Bond</name></author><author><name sortKey="Zhang, Jie" uniqKey="Zhang J">Jie Zhang</name></author></titleStmt><publicationStmt><date when="2012">2012</date><idno type="doi">10.1021/la205013n</idno><idno type="RBID">pubmed:22352793</idno><idno type="pmid">22352793</idno><idno type="wicri:Area/Main/Corpus">000E83</idno><idno type="wicri:Area/Main/Curation">000E83</idno><idno type="wicri:Area/Main/Exploration">000A79</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Graphene modified electrodes have been fabricated by electrodeposition from an aqueous graphene oxide solution onto conducting Pt, Au, glassy carbon, and indium tin dioxide substrates. Detailed investigations of the electrochemistry of the [Ru(NH(3))(6)](3+/2+) and [Fe(CN)(6)](3-/4-) and hydroquinone and uric acid oxidation processes have been undertaken at glassy carbon and graphene modified glassy carbon electrodes using transient cyclic voltammetry at a stationary electrode and near steady-state voltammetry at a rotating disk electrode. Comparisons of the data with simulation suggest that the transient voltammetric characteristics at graphene modified electrodes contain a significant contribution from thin layer and surface confined processes. Consequently, interpretations based solely on mass transport by semi-infinite linear diffusion may result in incorrect conclusions on the activity of the graphene modified electrode. In contrast, steady-state voltammetry at a rotating disk electrode affords a much simpler method for the evaluation of the performance of graphene modified electrode since the relative importance of the thin layer and surface confined processes are substantially diminished and mass transport is dominated by convection. Application of the rotated electrode approach with carbon nanotube modified electrodes also should lead to simplification of data analysis in this environment.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">22352793</PMID><DateCreated><Year>2012</Year><Month>03</Month><Day>20</Day></DateCreated><DateCompleted><Year>2012</Year><Month>07</Month><Day>05</Day></DateCompleted><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1520-5827</ISSN><JournalIssue CitedMedium="Internet"><Volume>28</Volume><Issue>11</Issue><PubDate><Year>2012</Year><Month>Mar</Month><Day>20</Day></PubDate></JournalIssue><Title>Langmuir : the ACS journal of surfaces and colloids</Title><ISOAbbreviation>Langmuir</ISOAbbreviation></Journal><ArticleTitle>Simplifying the evaluation of graphene modified electrode performance using rotating disk electrode voltammetry.</ArticleTitle><Pagination><MedlinePgn>5275-85</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1021/la205013n</ELocationID><Abstract><AbstractText>Graphene modified electrodes have been fabricated by electrodeposition from an aqueous graphene oxide solution onto conducting Pt, Au, glassy carbon, and indium tin dioxide substrates. Detailed investigations of the electrochemistry of the [Ru(NH(3))(6)](3+/2+) and [Fe(CN)(6)](3-/4-) and hydroquinone and uric acid oxidation processes have been undertaken at glassy carbon and graphene modified glassy carbon electrodes using transient cyclic voltammetry at a stationary electrode and near steady-state voltammetry at a rotating disk electrode. Comparisons of the data with simulation suggest that the transient voltammetric characteristics at graphene modified electrodes contain a significant contribution from thin layer and surface confined processes. Consequently, interpretations based solely on mass transport by semi-infinite linear diffusion may result in incorrect conclusions on the activity of the graphene modified electrode. In contrast, steady-state voltammetry at a rotating disk electrode affords a much simpler method for the evaluation of the performance of graphene modified electrode since the relative importance of the thin layer and surface confined processes are substantially diminished and mass transport is dominated by convection. Application of the rotated electrode approach with carbon nanotube modified electrodes also should lead to simplification of data analysis in this environment.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Guo</LastName><ForeName>Si-Xuan</ForeName><Initials>SX</Initials><Affiliation>School of Chemistry, Monash University, Clayton, Vic 3800, Australia.</Affiliation></Author><Author ValidYN="Y"><LastName>Zhao</LastName><ForeName>Shu-Feng</ForeName><Initials>SF</Initials></Author><Author ValidYN="Y"><LastName>Bond</LastName><ForeName>Alan M</ForeName><Initials>AM</Initials></Author><Author ValidYN="Y"><LastName>Zhang</LastName><ForeName>Jie</ForeName><Initials>J</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2012</Year><Month>03</Month><Day>07</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Langmuir</MedlineTA><NlmUniqueID>9882736</NlmUniqueID><ISSNLinking>0743-7463</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="aheadofprint"><Year>2012</Year><Month>3</Month><Day>7</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2012</Year><Month>2</Month><Day>23</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2012</Year><Month>2</Month><Day>23</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2012</Year><Month>2</Month><Day>23</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.1021/la205013n</ArticleId><ArticleId IdType="pubmed">22352793</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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