Physico-chemical characterization of IrO2-SnO2 sol-gel nanopowders for electrochemical applications

被引：31

作者：

Ardizzone, Silvia ^{[1
]}

Bianchi, Claudia L. ^{[1
]}

Borgese, Laura ^{[2
]}

Cappelletti, Giuseppe ^{[1
]}

Locatelli, Cristina ^{[1
]}

Minguzzi, Alessandro ^{[1
]}

Rondinini, Sandra ^{[1
]}

Vertova, Alberto ^{[1
]}

Ricci, Pier Carlo ^{[3
]}

Cannas, Carla ^{[4
]}

Musinu, Anna ^{[4
]}

机构：

[1] Univ Milan, Dipartimento Chim Fis & Elettrochim, I-20133 Milan, Italy

[2] Univ Brescia, Dept Mech & Ind Engn, I-25123 Brescia, Italy

[3] Univ Cagliari, Dept Phys, I-09042 Monserrato, CA, Italy

[4] Univ Cagliari, Dept Chem Sci, I-09042 Monserrato, CA, Italy

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2009年 / 39卷 / 11期

关键词：

Nanocomposites; Electrocatalysis; Sol-gel; Tin oxide; Iridium oxide; Dimensionally stable anodes; OXYGEN-EVOLVING ELECTRODES; IRIDIUM DIOXIDE ELECTRODES; SULFURIC-ACID-SOLUTION; THIN-FILM EVOLUTION; CAVITY MICROELECTRODE; O-2; EVOLUTION; ELECTROCATALYTIC PROPERTIES; OXIDE ELECTROCATALYSTS; COMPOSITE-MATERIALS; REDUCTION BEHAVIOR;

D O I：

10.1007/s10800-009-9895-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Mixed tin-iridium oxide (Sn0.85Ir0.15O2) nano-particles at low Ir content (15 mol%) were prepared by the sol-gel preparative route, varying calcination temperatures in the range 450-550 degrees C. The crystal structures, the phase composition and crystallite sizes were analyzed by X-ray powder diffraction (XRD). The local order of the materials was investigated by Raman spectroscopy. X-ray photoelectron spectroscopy (XPS) analysis revealed the variation of the Ir surface state with the temperature of firing. The morphology of crystallites and the aggregates were analyzed by high resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM), respectively. Nitrogen physisorption by BET method was adopted to evaluate the particle surface area and the mesopore volume distribution. Electrochemical properties of the Ti-supported powders were evaluated by cyclic voltammetry (CV) and quasi steady-state voltammetry.

引用

页码：2093 / 2105

页数：13

共 58 条

[11] Electrocatalytic hydrogenation of C2H4 on PtO2 powder -: A study of surface processes occurring at powder materials by cavity microelectrode [J].