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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.7b01107
|2 doi
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|a pubmed25n0909.xml
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|a (NLM)28617602
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|a DE-627
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|e rakwb
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|a eng
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|a Parker, Joseph F
|e verfasserin
|4 aut
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|a Rewriting Electron-Transfer Kinetics at Pyrolytic Carbon Electrodes Decorated with Nanometric Ruthenium Oxide
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 23.07.2018
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|a Date Revised 23.07.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Platinum is state-of-the-art for fast electron transfer whereas carbon electrodes, which have semimetal electronic character, typically exhibit slow electron-transfer kinetics. But when we turn to practical electrochemical devices, we turn to carbon. To move energy devices and electro(bio)analytical measurements to a new performance curve requires improved electron-transfer rates at carbon. We approach this challenge with electroless deposition of disordered, nanoscopic anhydrous ruthenium oxide at pyrolytic carbon prepared by thermal decomposition of benzene (RuOxCVD-C). We assessed traditionally fast, chloride-assisted ([Fe(CN)6]3-/4-) and notoriously slow ([Fe(H2O)6]3+/2+) electron-transfer redox probes at CVD-C and RuOx@CVD-C electrodes and calculated standard heterogeneous rate constants as a function of heat treatment to crystallize the disordered RuOx domains to their rutile form. For the fast electron-transfer probe, [Fe(CN)6]3-/4-, the rate increases by 34× over CVD-C once the RuOx is calcined to form crystalline rutile RuO2. For the classically outer-sphere [Fe(H2O)6]3+/2+, electron-transfer rates increase by an even greater degree over CVD-C (55×). The standard heterogeneous rate constant for each probe approaches that observed at Pt but does so using only minimal loadings of RuOx
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|a Journal Article
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Kamm, Gabrielle E
|e verfasserin
|4 aut
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|a McGovern, Ashlee D
|e verfasserin
|4 aut
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|a DeSario, Paul A
|e verfasserin
|4 aut
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|a Rolison, Debra R
|e verfasserin
|4 aut
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|a Lytle, Justin C
|e verfasserin
|4 aut
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|a Long, Jeffrey W
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 33(2017), 37 vom: 19. Sept., Seite 9416-9425
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:33
|g year:2017
|g number:37
|g day:19
|g month:09
|g pages:9416-9425
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|u http://dx.doi.org/10.1021/acs.langmuir.7b01107
|3 Volltext
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