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Optimization of the electrocatalytic activity of MN4- macrocyclics adsorbed on graphite electrodes for the electrochemical oxidation of L-cysteine by tuning the M (II)/(I) formal potential of the catalyst: An overview

dc.contributor.authorRecio F.J.
dc.contributor.authorGutierrez C.A.
dc.contributor.authorVenegas R.
dc.contributor.authorLinares-Flores C.
dc.contributor.authorCaro C.A.
dc.contributor.authorZagal J.H.
dc.date.accessioned2020-09-02T22:26:20Z
dc.date.available2020-09-02T22:26:20Z
dc.date.issued2014
dc.identifier10.1016/j.electacta.2014.04.098
dc.identifier.citation140, , 482-488
dc.identifier.issn00134686
dc.identifier.urihttps://hdl.handle.net/20.500.12728/5872
dc.descriptionThe M(II)/(I) formal potential of MN4 macrocyclic complexes dictates their electrocatalytic activity for many reactions and L-cysteine oxidation is not an exception. In this work we review the literature related to this reaction and propose a semi-empirical model that can describe the catalytic activity of these chelates in terms of their formal potential. A correlation of log i (at constant potential) versus the M(II)/(I) formal potential for M= Fe,Co) of the catalysts gives a volcano curve. Our results clearly show that the M (II)/(I) formal potential of N4-macrocyclic complexes needs to be adjusted to values around -1.0 V vs. SCE to obtain the highest catalytic activity for the oxidation of L-cysteine. When comparing chelates of different metals (M= Cr, Mn, Fe, Co) of tetrasulphonated phthalocyanines only a linear correlation is obtained. © 2014 Elsevier Ltd.
dc.language.isoen
dc.publisherElsevier Ltd
dc.subjectL-cysteine oxidation
dc.subjectMetal macrocyclics
dc.subjectOptimizing electrocatalytic activity
dc.subjectPhthalocyanines
dc.subjectPorphyrins
dc.subjectVolcano plots
dc.subjectAmino acids
dc.subjectChelation
dc.subjectElectrochemical oxidation
dc.subjectGraphite electrodes
dc.subjectNitrogen compounds
dc.subjectPorphyrins
dc.subjectVolcanoes
dc.subjectElectrocatalytic activity
dc.subjectL-cysteine
dc.subjectMacrocyclics
dc.subjectPhthalocyanines
dc.subjectVolcano plots
dc.subjectCatalyst activity
dc.subjectPorphyrins
dc.titleOptimization of the electrocatalytic activity of MN4- macrocyclics adsorbed on graphite electrodes for the electrochemical oxidation of L-cysteine by tuning the M (II)/(I) formal potential of the catalyst: An overview
dc.typeArticle


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