ELECTROCHEMISTRY AND PHOTOELECTROCHEMISTRY OF PILLARED-CLAY-MODIFIED ELECTRODES

被引：42

作者：

RONG, DT ^{[1
]}

KIM, YI ^{[1
]}

MALLOUK, TE ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT CHEM,AUSTIN,TX 78712

来源：

INORGANIC CHEMISTRY | 1990年 / 29卷 / 08期

关键词：

D O I：

10.1021/ic00333a018

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Clay-modified electrodes (CME) were made by binding Al13O4(OH)283+-pillared montmorillonite to SnO2and Pt surfaces via a thin (2-4 monolayer thick) coating of polymerized silane I. The polymer provides a binding site for multiply charged anions [formula-omitted] such as Fe(CN)64-and Mo(CN)84-, while the clay external surface strongly binds large cations such as Os(bpy)32+and Ru(bpy)32+. Charge-trapping behavior, which is a consequence of spatial ordering of the electroactive anions and cations, is observed in cyclic voltammetry of the CME in aqueous KH 2PO4solution. With Ru(bpy)32+exchanged onto the clay surface, photocathodic currents are generated with a quantum efficiency (per photon absorbed) of ca. 1%. This photocurrent is attributed to electron donor quenching of the Ru(bpy)32+excited state by Fe(CN)64-or Mo(CN)84-. © 1990, American Chemical Society. All rights reserved.

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页码：1531 / 1535

页数：5

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