The selective oxidation of ethanol to CO2 at Ptpc/Ir/Pt metallic multilayer nanostructured electrodes |
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Authors: | Renato G Freitas Ernesto C Pereira Paul A Christensen |
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Institution: | aNANOFAEL, LIEC, Departamento de Química, Universidade Federal de São Carlos, C.P. 676, CEP 13565-905, São Carlos, SP, Brazil;bSchool of Chemical Engineering and Advanced Materials, Bedson Building, Newcastle University, NE1 7RU, United Kingdom |
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Abstract: | In this work, Ptpc/Ir/Pt metallic multilayer nanostructured electrodes were prepared. The composition and number of the constituent metal layers were varied and the number of Ir and Pt layers studied were: 1.5:1.5, 1.5:10, 10:1.5, 10:10 and 250:250 Ir and Pt monolayers. The ethanol electrooxidation reaction and its products was studied using electrochemical in situ FTIR technique and could be observed as a selective cleavage of the ethanol C C bond in acidic electrolyte. Neither acetaldehyde nor acetic acid IR band could be observed for ethanol electrooxidation at 1.5 V vs. RHE over Ptpc/Ir250/Pt250 metallic multilayer electrodes. Also, the enhancement on CO2 production over this electrode was more than six times the amount observed using the Ptpc electrodes. Thus, the complete C C cleavage bond in ethanol molecule was observed, leading only CO2 as reaction product. |
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Keywords: | Metallic multilayers Ethanol electrooxidation C sciencedirect com/scidirimg/entities/sbnd" style="vertical-align:middle C cleavage" target="_blank">">C cleavage |
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