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Enhanced light-induced hydrogen evolution reaction by supramolecular systems of cobalt(II) and copper(II) octaethylporphyrins on glassy carbon electrodes

dc.contributor.authorCanales C.
dc.contributor.authorOlea A.F.
dc.contributor.authorGidi L.
dc.contributor.authorArce R.
dc.contributor.authorRamírez G.
dc.date.accessioned2020-09-02T22:14:08Z
dc.date.available2020-09-02T22:14:08Z
dc.date.issued2017
dc.identifier10.1016/j.electacta.2017.11.135
dc.identifier.citation258, , 850-857
dc.identifier.issn00134686
dc.identifier.urihttps://hdl.handle.net/20.500.12728/3884
dc.descriptionChemically modified glassy carbon electrodes formed by π-stacking of commercial cobalt (II) and copper (II) porphyrins have been used as stable and efficient electrocatalytic system for the hydrogen evolution reaction at pH 7.0, as reported in a previous work. In this work, it has been found that when these systems are irradiated with light of different wavelengths, their electrocatalytic responses change in terms of overpotential and photocurrent. Thus, the electroactivity of these systems towards hydrogen evolution reaction can be enhanced by irradiation at certain wavelength with no requirement of a photosensitizer. Interestingly, the largest enhancement of this reaction is observed at wavelengths corresponding to specific arrangement of porphyrins on the electrode. Cyclic voltammetry, photoelectrochemical impedance spectroscopy and UV–visible spectroscopy studies were done in order to corroborate and discuss this effect. Finally, XRD experiments allowed us to confirm the existence of highly ordered arrangement in each supramolecular system and that this is a determinant factor in the photoelectrochemical responses. © 2017 Elsevier Ltd
dc.language.isoen
dc.publisherElsevier Ltd
dc.subjectHydrogen evolution reaction
dc.subjectMetalloporphyrins
dc.subjectModified electrodes
dc.subjectPhotoelectrocatalysis
dc.subjectSupramolecular system
dc.subjectCobalt
dc.subjectCopper
dc.subjectCyclic voltammetry
dc.subjectElectrochemistry
dc.subjectGlass
dc.subjectGlass membrane electrodes
dc.subjectHydrogen
dc.subjectPhotosensitizers
dc.subjectPorphyrins
dc.subjectSupramolecular chemistry
dc.subjectUltraviolet visible spectroscopy
dc.subjectHydrogen evolution reactions
dc.subjectMetallo-porphyrins
dc.subjectModified electrodes
dc.subjectPhoto-electrocatalysis
dc.subjectSupramolecular systems
dc.subjectElectrodes
dc.titleEnhanced light-induced hydrogen evolution reaction by supramolecular systems of cobalt(II) and copper(II) octaethylporphyrins on glassy carbon electrodes
dc.typeArticle


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