Yayınlanmış 1 Ocak 2010
| Sürüm v1
Dergi makalesi
Açık
Molecular Electrocatalysis for Oxygen Reduction by Cobalt Porphyrins Adsorbed at Liquid/Liquid Interfaces
Yazarlar/Oluşturanlar
- 1. Ecole Polytech Fed Lausanne, Lab Electrochem Phys & Analyt, Stn 6, CH-1015 Lausanne, Switzerland
- 2. ASCR, J Heyrovsky Inst Phys Chem, Prague 18223 8, Czech Republic
- 3. Univ Bourgogne, Inst Chim Mol, ICMUB UMR 5260, F-21078 Dijon, France
- 4. Sect Sci Pharmaceut, CH-1211 Geneva 4, Switzerland
Açıklama
Molecular electrocatalysis for oxygen reduction at a polarized water/1,2-dichloroethane (DCE) interface was studied, involving aqueous protons, ferrocene (Fc) in DCE and amphiphilic cobalt porphyrin catalysts adsorbed at the interface. The catalyst, (2,8,13,17-tetraethyl-3,7,12,18-tetramethyl-5-p-aminophenylporphyrin) cobalt(II) (CoAP), functions like conventional cobalt porphyrins, activating 02 via coordination by the formation of a superoxide structure. Furthermore, due to the hydrophilic nature of the aminophenyl group, CoAP has a strong affinity for the water/DCE interface as evidenced by lipophilicity mapping calculations and surface tension measurements, facilitating the protonation of the CoAP-O(2) complex and its reduction by ferrocene. The reaction is electrocatalytic as its rate depends on the applied Galvani potential difference between the two phases.
Dosyalar
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Dosyalar
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