The selective oxidation of ethanol to CO2 at Ptpc/Ir/Pt metallic multilayer nanostructured electrodes

被引：22

作者：

Freitas, Renato G. ^{[1
,2
]}

Pereira, Ernesto C. ^{[1
]}

Christensen, Paul A. ^{[2
]}

机构：

[1] Univ Fed Sao Carlos, Dept Quim, NANOFAEL, LIEC, BR-13565905 Sao Carlos, SP, Brazil

[2] Newcastle Univ, Sch Chem Engn & Adv Mat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2011年 / 13卷 / 10期

基金：

巴西圣保罗研究基金会;

关键词：

Metallic multilayers; Ethanol electrooxidation; C-C cleavage; OXIDE-FILM FORMATION; METHANOL; ELECTROOXIDATION; BILAYER; ACID; POLYCRYSTALLINE;

D O I：

10.1016/j.elecom.2011.07.025

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work, Pt-pc/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 FUR 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 Pt-pc/Ir-250/Pt-250 metallic multilayer electrodes. Also, the enhancement on CO2 production over this electrode was more than six times the amount observed using the Pt-pc electrodes. Thus, the complete C-C cleavage bond in ethanol molecule was observed, leading only CO2 as reaction product. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1147 / 1150

页数：4

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