Electrocatalytic Activity for O2 Reduction of Unsubstituted and Perchlorinated Iron Phthalocyanines Adsorbed on Amino-Terminated Multiwalled Carbon Nanotubes Deposited on Glassy Carbon Electrodes

Cañete, Paulina; Silva, J. Francisco; Zagal, José H.

doi:10.4067/s0717-97072014000200030

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…The Au(111)/Down(Up)/16(Cl)FePc systems show the peaks at −0.082 and −0.086 V are attributed to Fe (II)/(I) redox process. The peaks +0.714 V and +0.714 V are attributed to Fe (III)/(II) redox process (Figure , panels b and d). To allocate FePc and 16(Cl)FePc redox processes, we have use the Pourbaix diagram for the metal-centered redox processes of different iron phthalocyanines adsorbed on an OPG electrode from reference. , …”

Section: Resultsmentioning

confidence: 94%

Building Pyridinium Molecular Wires as Axial Ligands for Tuning the Electrocatalytic Activity of Iron Phthalocyanines for the Oxygen Reduction Reaction

et al. 2018

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We have been able to “tune” the electrocatalytic activity of iron phthalocyanine (FePc) and iron hexadodecachlorophthalocyanine (16(Cl)FePc) for the oxygen reduction reaction (ORR) by manipulating the “pull effect” of pyridinium molecules axially bounded to the phthalocyanine complexes (FePcs). These axial ligands play both the role of molecular anchors and also of molecular wires. The axial ligands also affect the reactivity of the Fe metal center in the phthalocyanine. The “pull effect” originates from the positive charge located on the pyridinium core. We have explored the influence of the core positions (Up or Down), in two structural pyridiniums isomers on the activity of FePc and 16(Cl)FePc for the ORR. Of all self-assembled catalysts tested, the highest catalytic activity was exhibited by the Au(111)/Up/FePc system. XPS measurements and DFT calculations showed that it is possible to tailor the FePc–N(pyridiniums) Fe–O2 binding energies, by changing the core positions and affecting the “pull effect” of pyridiniums. This affects directly the catalytic activity of FePcs. The plot of activity as (log I)E versus the calculated Fe–O2 binding energies gives an activity volcano correlation, indicating that an optimum binding energy of O2 with the Fe center provides the highest activity.

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Section: Resultsmentioning

confidence: 94%

Building Pyridinium Molecular Wires as Axial Ligands for Tuning the Electrocatalytic Activity of Iron Phthalocyanines for the Oxygen Reduction Reaction

et al. 2018

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“…The catalyst exhibited an excellent activity than commercial Pt/C and anti-crossover effect for methanol oxidation [54]. Amino-functionalized multi-walled carbon nanotubes (MWCNT-NH 2 ) modified with FePc display of a great surface area for the reduction of molecular oxygen in basic media, according to Cañete et al [55]. Years later, in alkaline media, the electrochemical performance of Fe-N 4 -macrocycle adsorbed on the edge plane of carbon nanotubes has the same order of magnitude of commercial Pt/C catalysts.…”

Section: Advancement In the Utilization Of Metal-n 4 Chelate Macrocycles For Oxygen Reduction Reactionmentioning

confidence: 99%

Iron(II) phthalocyanine (FePc) over carbon support for oxygen reduction reaction electrocatalysts operating in alkaline electrolyte

Oliveira

Ficca

Gokhale

et al. 2020

J Solid State Electrochem

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In this work, we initially report a detailed advancement in the utilization of metal-N 4 chelate macrocycles in the oxygen reduction reaction (ORR). Then, iron(II) phthalocyanines supported on two different carbon-based supports specifically carbon nanotube and black pearl (carbon spheres) were synthesized and their activities toward ORR in alkaline media were studied. With the help of physical and surface characterization like Raman, BET, XRD, XPS, and electron microscopy analysis, the similarity in surface chemistry and surface area of the materials and the differences in the structure and morphology of the supports were established. This work also brings forth the effect of support properties on the electrocatalytic activity of the materials by a detailed electrochemical analysis using rotating disk electrode in oxygen saturated 0.1 M KOH. Comparison with existing literature on Fe-phthalocyanine supported on diverse carbon support is presented.

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A new electrode for acid-base titration based on poly(copper phthalocyanine)

Borsos

Inzelt

2015

J Solid State Electrochem

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Electrocatalytic Activity for O2 Reduction of Unsubstituted and Perchlorinated Iron Phthalocyanines Adsorbed on Amino-Terminated Multiwalled Carbon Nanotubes Deposited on Glassy Carbon Electrodes

Cited by 4 publications

References 10 publications

Building Pyridinium Molecular Wires as Axial Ligands for Tuning the Electrocatalytic Activity of Iron Phthalocyanines for the Oxygen Reduction Reaction

Building Pyridinium Molecular Wires as Axial Ligands for Tuning the Electrocatalytic Activity of Iron Phthalocyanines for the Oxygen Reduction Reaction

Iron(II) phthalocyanine (FePc) over carbon support for oxygen reduction reaction electrocatalysts operating in alkaline electrolyte

A new electrode for acid-base titration based on poly(copper phthalocyanine)

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