Molecular conductance versus inductive effects of axial ligands on the electrocatalytic activity of self-assembled iron phthalocyanines: The oxygen reduction reaction

The investigation of electrochemical properties of active layers containing 5,15-bis(pyrid-3-yl)-3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphine, [5,15-bis(pyrid-3-yl)-3,7,13,17-tetramethyl-2,8,12, 18-tetraethylporphinato]cobalt(II), bispyridine[5,15-bis(pyrid-3-yl)-3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphinato]cobalt(III), [5,15-bis(pyrid-4-yl)-3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphinato]cobalt(II) and bispyridine[5,15-bis(pyrid-4-yl)-3,7,13,17-tetramethyl-2,8,12,18-tetraethylporphinato]cobalt(III) in 0.1 M KOH aqueous solution has been carried out by cyclic voltammetry. The potential ranges of redox processes related to the transformation of the porphyrin macrocycle, pyridyl substituents and central metal have been established. The electrochemical parameters of oxygen electroreduction reaction (the half-wave potential — E[Formula: see text](O[Formula: see text]), the maximum potential — E[Formula: see text](O[Formula: see text]), the current density — j, the activation energy — Eact) have been determined. It was shown that all porphyrins exhibit the catalytic activity. The electroreduction process of oxygen on electrode with the porphyrin-ligand occurs via 2-electron mechanism to give hydrogen peroxide ion HO2-, and on ones with the cobalt porphyrins — via parallel-sequential pathway including 2-electron and 4-electron processes to give HO2-, OH-. The presence of pyridine axial ligands in Co-complexes leads to a significant increase of the electrocatalytic activity in molecular oxygen reduction reaction.

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

ACS Catalysis ◽

10.1021/acscatal.8b01479 ◽

2018 ◽

Vol 8 (9) ◽

pp. 8406-8419 ◽

Cited By ~ 13

Author(s):

Ana Pizarro ◽

Gabriel Abarca ◽

Cristian Gutiérrez-Cerón ◽

Diego Cortés-Arriagada ◽

Fabiano Bernardi ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Electrocatalytic Activity ◽

Molecular Wires ◽

Reduction Reaction ◽

Axial Ligands

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Structure and Electrocatalytic Activity of Carbon-Supported Pt−Ni Alloy Nanoparticles Toward the Oxygen Reduction Reaction

The Journal of Physical Chemistry B ◽

10.1021/jp049034+ ◽

2004 ◽

Vol 108 (30) ◽

pp. 11024-11034 ◽

Cited By ~ 239

Author(s):

Hui Yang ◽

Walter Vogel ◽

Claude Lamy ◽

Nicolás Alonso-Vante

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Electrocatalytic Activity ◽

Reduction Reaction ◽

Alloy Nanoparticles ◽

Ni Alloy

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Surface Structure Dependent Electrocatalytic Activity of Co3O4 Anchored on Graphene Sheets toward Oxygen Reduction Reaction

Scientific Reports ◽

10.1038/srep02300 ◽

2013 ◽

Vol 3 (1) ◽

Cited By ~ 204

Author(s):

Junwu Xiao ◽

Qin Kuang ◽

Shihe Yang ◽

Fei Xiao ◽

Shuai Wang ◽

...

Keyword(s):

Oxygen Reduction Reaction ◽

Surface Structure ◽

Oxygen Reduction ◽

Electrocatalytic Activity ◽

Reduction Reaction ◽

Graphene Sheets

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Tailoring molecular architectures of Fe phthalocyanine on nanocarbon supports for high oxygen reduction performance

Journal of Materials Chemistry A ◽

10.1039/c5ta01400j ◽

2015 ◽

Vol 3 (18) ◽

pp. 10013-10019 ◽

Cited By ~ 39

Author(s):

Shiming Zhang ◽

Heyou Zhang ◽

Xing Hua ◽

Shengli Chen

Keyword(s):

Oxygen Reduction Reaction ◽

Oxygen Reduction ◽

Alkaline Solution ◽

Electrocatalytic Activity ◽

Reduction Reaction ◽

High Oxygen ◽

Molecular Architectures

Tailored molecular architectures of FePc on nanocarbon supports from nanorods to uniform shells exhibit excellent electrocatalytic activity for the oxygen reduction reaction in alkaline solution.

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