Electrooxidation of Fe, Co, Ni and Cu Metalloporphyrins on Edge‐Plane Pyrolytic Graphite Electrodes and Their Electrocatalytic Ability towards the Reduction of Molecular Oxygen in Acidic Media

Richards, Gregory; Swavey, Shawn

doi:10.1002/ejic.200900651

Cited by 23 publications

(5 citation statements)

References 43 publications

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“…Over the past few decades, extensive efforts have been made to design catalytic materials bearing macrocyclic metal N 4 complexes such as porphyrin and phthalocyanines 25,26 . The macrocyclic metal N 4 complexes with different transition metals have been identified as a promising electrode material for fuel cells 27–29 and lithium-air (Li 2 O 2 ) battery 30 . Recently, we demonstrated the use of macrocyclic Co(III) 31 and Mn(III) N 4 complexes coated with polydopamine 32 and supported on graphene as a promising electrocatalyst for oxygen reduction reaction (ORR).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Electrochemical Deposition of Cobalt Complex and Poly(pyrrole) Thin Films for Supercapacitor Electrodes

Parnell

Chhetri

Mitchell

et al. 2019

Sci Rep

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Supercapacitors are beneficial as energy storage devices and can obtain high capacitance values greater than conventional capacitors and high power densities compared to batteries. However, in order to improve upon the overall cost, energy density, and charge-discharge rates, the electrode material of supercapacitors needs to be fine-tuned with an inexpensive, high conducting source. We prepared a Co(III) complex and polypyrrole (PPy) composite thin films (CoN 4 - PPy) that was electrochemically deposited on the surface of a glassy carbon working electrode. Cyclic voltammetry studies indicate the superior performance of CoN 4 -PPy in charge storage in acidic electrolyte compared to alkaline and organic solutions. The CoN 4 -PPy material generated the highest amount of specific capacitance (up to 721.9 F/g) followed by Co salt and PPy (Co-PPy) material and PPy alone. Cyclic performance studies showed the excellent electrochemical stability of the CoN 4 -PPy film in the acidic medium. Simply electrochemically depositing an inexpensive Co(III) complex with a high electrically conducting polymer of PPy delivered a superior electrode material for supercapacitor applications. Therefore, the results indicate that novel thin films derived from Co(III) metal complex and PPy can store a large amount of energy and maintain high stability over many cycles, revealing its excellent potential in supercapacitor devices.

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Section: Introductionmentioning

confidence: 99%

Simultaneous Electrochemical Deposition of Cobalt Complex and Poly(pyrrole) Thin Films for Supercapacitor Electrodes

Parnell

Chhetri

Mitchell

et al. 2019

Sci Rep

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“…Many reports indicate that the central metal ions, which are usually selected from the transition metals Co, Ni, Mn, Fe or Cu, have a great influence on the ORR activity of metalloporphyrins. [58,59,60,61,62] Among them, cobalt and iron porphyrins have been mostly researched because of their high catalytic activity. Chu et al synthesized tetraphenyl porphyrins with different transition center metal ions and investigated their ORR properties.…”

Section: Central Metal Ion Speciesmentioning

confidence: 99%

“…Deprotonated porphyrins are dianionic macrocyclic ligands that can bind to any metal ion to produce tetracoordinate structures with unoccupied axial positions in principle. Many reports indicate that the central metal ions, which are usually selected from the transition metals Co, Ni, Mn, Fe or Cu, have a great influence on the ORR activity of metalloporphyrins [58,59,60,61,62] . Among them, cobalt and iron porphyrins have been mostly researched because of their high catalytic activity.…”

Section: Porphyrin Structural Effects On Orr Performancementioning

confidence: 99%

Meso‐substituted Metalloporphyrin‐based Composites for Electrocatalytic Oxygen Reduction Reactions

Yuan

George

et al. 2023

ChemNanoMat

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Metalloporphyrins have been regarded as one of the most promising electrocatalysts for oxygen reduction reactions (ORRs) due to their ease of structure modification and the robust coordinated M−N4 environment. However, the electrocatalytic activity, selectivity and stability of the metalloporphyrin‐based composite catalysts are often reported to be much poorer than those of the Pt‐based materials, arousing researchers to devote to exploring a thorough understanding of the relationship between the catalyst structures and ORR performance/mechanisms. Here we will review the design of meso‐positioned porphyrin structures from the aspects of selection of central metal ion species in both monometallic and bimetallic molecules, and modulation of peripheral functional substituents to introduce beneficial effects, including electron affinity, steric effects, interfacial charge states and proton management. Influences from different carbon materials as the support for composite catalysts as well as the electrolytes on oxygen reduction properties will be briefly illustrated before presenting the perspectives and insights for future works in conclusion remarks. We hope that this Review will serve as a roadmap for advancing the insights of the molecular structural and substrate morphological factors impacting ORR properties with the ultimate goal of developing and improving novel metalloporphyrins as efficient and durable electrocatalysts to champion the precious Pt/C.

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“…11 Adsorption of Ni(II) porphyrin complexes onto EPG electrodes followed by oxidation in 0.5 M H 2 SO 4 results in a new redox-active, pH-dependent modified electrode. 12 The structure of ''amorphous nickel sulfide'' has been determined as a hydrated nanoparticulate material with an approximate formula NiSÁ1.5H 2 O. The particles comprise a crystalline, anhydrous core with the millerite (NiS) structure, surrounded by a hydrated shell phase.…”

Section: Nickelmentioning

confidence: 99%

Nickel, palladium and platinum

Dervisi

2010

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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Electrooxidation of Fe, Co, Ni and Cu Metalloporphyrins on Edge‐Plane Pyrolytic Graphite Electrodes and Their Electrocatalytic Ability towards the Reduction of Molecular Oxygen in Acidic Media

Abstract: Edge-plane pyrolytic graphite (EPG) electrodes coated with 5,10,15,20-tetrakis(4-hydroxy-3-methoxyphenyl)

Cited by 23 publications

References 43 publications

Simultaneous Electrochemical Deposition of Cobalt Complex and Poly(pyrrole) Thin Films for Supercapacitor Electrodes

Simultaneous Electrochemical Deposition of Cobalt Complex and Poly(pyrrole) Thin Films for Supercapacitor Electrodes

Meso‐substituted Metalloporphyrin‐based Composites for Electrocatalytic Oxygen Reduction Reactions

Nickel, palladium and platinum

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