Covalent attachment of pyridine-type molecules to glassy carbon surfaces by electrochemical reduction of in situ generated diazonium salts. Formation of ruthenium complexes on ligand-modified surfaces

Yeşildağ, Ali; Ekinci, Duygu

doi:10.1016/j.electacta.2010.06.020

Cited by 36 publications

(32 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface coverage values (Γ) of the films can be estimated by comparing the N1s peak areas to the C1s peak areas . Accordingly, the calculated values of Γ for the APP/GC and TAPP/GC electrodes were found to be 25.6×10 13 molecules cm −2 and 18.5×10 13 molecules cm −2 , respectively.…”

Section: Resultssupporting

confidence: 90%

Electrocatalytic Reduction of Oxygen at Glassy Carbon Electrodes Coated with Diazonium‐derived Porphyrin/Metalloporphyrin Films

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this study, the influence of the film structure was investigated on the electrocatalytic oxygen reduction at GC electrodes covered with porphyrin and metalloporphyrin rings via the diazonium modification method. For that purpose, primarily, tetraphenylporphyrin (TPP) films on GC electrode surfaces were prepared by electroreduction of in situ generated diazonium salts of 5‐(4‐aminophenyl)‐10,15,20‐triphenylporphyrin (APP) and 5,10,15,20‐tetrakis(4‐aminophenyl)porphyrin (TAPP) molecules. Next, the formation of metalloporphyrin films on the modified surfaces was accomplished through the complexation reactions of surface porphyrin rings with metal ions in the salt solutions containing Mn(II), Fe(III) and Co(II) ions. The resulting porphyrin and metalloporphyrin layers were identified with XPS and ICP‐MS. The electrochemical barrier properties of the films on GC surfaces were examined by cyclic voltammetry in K3Fe(CN)6 aqueous solution. The electrocatalytic abilities of the resulting films were also investigated for the oxygen electrochemical reduction by employing cyclic voltammetry in PBS solutions saturated with oxygen. The results showed that the oxygen reduction potentials on modified GC electrodes were shifted to less negative potentials compared to that of bare GC electrode. Also, it was obtained that the oxygen reduction reaction was more effective on the GC electrodes modified with TPP rings by using TAPP molecules than those prepared by using APP molecules.

show abstract

Section: Resultssupporting

confidence: 90%

Electrocatalytic Reduction of Oxygen at Glassy Carbon Electrodes Coated with Diazonium‐derived Porphyrin/Metalloporphyrin Films

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…cations has been mostly carried out with 3-diazopyridinium cations, [19][20][21][22][23] because 4-aminoand even more 2-amino-diazopyridinium salts are considered highly unstable and claimed not to be useful for surface functionalization. [22], [21] However, some works report the grafting from 4-amino precursors.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Reductive electrografting of in situ produced diazopyridinium cations: Tailoring the interface between carbon electrodes and electroactive bacterial films

Smida

Lebègue

Bergamini

et al. 2018

Bioelectrochemistry

View full text Add to dashboard Cite

Carbon electrodes were functionalized through the reduction of diazopyridinium cations that are produced from in situ diazotization of 2-, 3- and 4-aminopyridine. Diazopyridinium salts were much more rarely employed for surface functionalization than other aryldiazonium derivatives. A study combining X-ray Photoelectron Spectroscopy (XPS), contact angle, ellipsometry, Atomic Force Microscopy (AFM) measurements and electrochemical analyses demonstrates that films obtained from 4-diazopyridinium cations are hydrophilic, dense, compact but sufficiently thin to preserve fast electronic transfer rate, being then relevant to efficiently tailor the interface between the anode surface and an electroactive biofilm. Microbial Fuels Cells (MFCs) with pyridine-functionalized graphite anodes exhibit faster development and improved performances than MFCs operating with bare graphite anodes.

show abstract

“…Hence, it was possible to A c c e p t e d M a n u s c r i p t 7 perform an excellent convolution (red line), to determine only one Ru 3d signal, a doublet at 279.45 eV and 283.70 eV (blue line), corresponding to zero-valent Ru 3d 5/2 and Ru 3d 3/2, respectively [68,69]. In addition, a small peak corresponding to adventitious carbon (green line) was identified [70]. The asymmetric peak corresponds to a double-Lorentzian line-shape [71].…”

Section: Resultsmentioning

confidence: 97%

Solventless synthesis of ruthenium nanoparticles

García-Peña

Redón

Herrera-Gómez

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

Covalent attachment of pyridine-type molecules to glassy carbon surfaces by electrochemical reduction of in situ generated diazonium salts. Formation of ruthenium complexes on ligand-modified surfaces

Cited by 36 publications

References 63 publications

Electrocatalytic Reduction of Oxygen at Glassy Carbon Electrodes Coated with Diazonium‐derived Porphyrin/Metalloporphyrin Films

Electrocatalytic Reduction of Oxygen at Glassy Carbon Electrodes Coated with Diazonium‐derived Porphyrin/Metalloporphyrin Films

Reductive electrografting of in situ produced diazopyridinium cations: Tailoring the interface between carbon electrodes and electroactive bacterial films

Solventless synthesis of ruthenium nanoparticles

Contact Info

Product

Resources

About