Direct reversible voltammetry and electrocatalysis with surface-stabilised Fe2O3 redox states

被引：38

作者：

Cummings, Charles Y. ^{[1
]}

Bonne, Michael J. ^{[1
]}

Edler, Karen J. ^{[1
]}

Helton, Matthew ^{[2
]}

McKee, Anthony ^{[2
]}

Marken, Frank ^{[1
]}

机构：

[1] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England

[2] Unilever R&D Port Sunlight, Wirral CH63 3JW, Merseyside, England

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2008年 / 10卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

Voltammetry; Iron oxide; Underpotential zone; Nanoparticle; Mesoporous film; Glucose; Sensor;

D O I：

10.1016/j.elecom.2008.09.018

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Nanoparticle film voltammetry is employed to explore the presence and reactivity of surface-stabilised iron redox centers at the interface of immobilised Fe2O3 nanoparticles of ca. 4 nm diameter and aqueous buffer media. Mesoporous films of Fe2O3 nanoparticles on tin-doped indium oxide (ITO) substrates are formed in a layer-by-layer deposition process from aqueous colloidal Fe2O3 and aqueous cyclohexyl-hexacarboxylate followed by thermal (500 degrees C) removal of the organic binder content. Both reversible oxidation and reversible reduction responses for Fe(III) are observed in phosphate and carbonate buffer media in the "underpotential" zone. Higher oxidation states of iron formed anodically (here tentatively assigned to Fe(IV)) are shown to be inert in phosphate buffer media but reactive towards the oxidation of glucose in carbonate buffer media. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：1773 / 1776

页数：4

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