Enhanced electrocatalytic activity of oxygen reduction by cobalt-porphyrin functionalized with graphene oxide in an alkaline solution
| Autor: | Hyoung Soon Han, Hyo Kyoung Lee, Seungwon Jeon, Sung Cho, Jung-Min You |
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| Rok vydání: | 2014 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Graphene Inorganic chemistry Oxide Energy Engineering and Power Technology chemistry.chemical_element Condensed Matter Physics Electrochemistry law.invention Catalysis chemistry.chemical_compound Fuel Technology chemistry law Reagent Cyclic voltammetry Cobalt Voltammetry |
| Zdroj: | International Journal of Hydrogen Energy. 39:4803-4811 |
| ISSN: | 0360-3199 |
| Popis: | Cobalt[5,15-(p-aminophenyl)-10,20-(pentafluorophenyl)porphyrin] (CoAPFP) functionalized with graphene oxide (GO) by N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDC hydrochloride) was used as an amide-coupling reagent (GO-CoAPFP). Electrochemical investigation revealed that ERGO-CoAPFP exhibited much better catalysis and better-improved oxygen reduction reaction (ORR) than GO-CoAPFP. ERGO-CoAPFP is a simple and facile method of improving electrocatalytic activity. The ERGO-CoAPFP catalysts were tested in ORR using electrochemical techniques such as cyclic voltammetry (CV) and rotating-ring-disk-electrode (RRDE) hydrodynamic voltammetry to quantitatively obtain the ORR kinetic constants and the reaction mechanisms on a glassy carbon electrode (GCE) in a 0.1 M KOH solution. The electrocatalytic oxygen reduction reaction of RRDE modified with ERGO-CoAPFP established a pathway of four-electron transfer reactions. |
| Databáze: | OpenAIRE |
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