A novel reactivity descriptor for MN4 molecular catalysts for the oxidation of 2-mercaptoethanol and of thioglycolic acid: The Electrochemical Hardness
This manuscript describes a novel reactivity descriptor for Fe phthalocyanines molecular catalysts confined on the surface of OPG electrodes. The descriptor ΔE°’cat. is the gap in potential between the E°Fe(III)/(II) and E°Fe(II)/(I) redox processes for each FeN4 catalyst. This descriptor, labeled a...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-05-01
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| Series: | Electrochemistry Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248125000499 |
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| Summary: | This manuscript describes a novel reactivity descriptor for Fe phthalocyanines molecular catalysts confined on the surface of OPG electrodes. The descriptor ΔE°’cat. is the gap in potential between the E°Fe(III)/(II) and E°Fe(II)/(I) redox processes for each FeN4 catalyst. This descriptor, labeled as the electrochemical hardness ΔE°’cat. Was examined using FeN4 macrocyclic complexes for the electrooxidation of 2-mercaptoethanol (2-ME) and thioglycolic acid TGA. Our findings reveal that the reactivity as log log(j/Γ)E, plotted versus E°Fe(III)/(II) or E°Fe(II)/(I) give two linear correlations. The activity log(j/Γ)E in both cases decreases with the redox potential of each FeN4 catalyst. In contrast log(j/Γ)E, or log (TOF)E, increase with ΔE°’cat.. The FeS binding energy ΔE°’cat. Correlates linearly with ΔE°’cat. so the softer the system the greater the binding energy and the lower the catalytic activity. |
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| ISSN: | 1388-2481 |