X-RAY-DIFFRACTION CHARACTERIZATION OF IRIDIUM DIOXIDE ELECTROCATALYSTS

被引：21

作者：

BENEDETTI, A

POLIZZI, S

RIELLO, P

DEBATTISTI, A

MALDOTTI, A

机构：

[1] UNIV FERRARA,DIPARTMENTO CHIM,I-44100 FERRARA,ITALY

[2] CNR,CTR STUDIO FOTOCHIM & REATTIVITA STATI ECCITATI,I-44100 FERRARA,ITALY

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1991年 / 1卷 / 04期

关键词：

X-RAY DIFFRACTION; LINE BROADENING; IRIDIUM DIOXIDE; ELECTROCATALYST;

D O I：

10.1039/jm9910100511

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An X-ray diffraction (XRD) line-broadening analysis of coatings of pyrolytic iridium dioxide supported on amorphous silica microbeads is reported. The influence of the temperature of pyrolysis and of the annealing treatments on the average crystallite sizes of the IrO2 and Ir phases have been studied in detail. The values obtained for IrO2 are lower than those obtained from an analgous RuO2 system. However, the analysis suggests that in both cases the crystalline phase grows within an amorphous microcrystalline environment where impurities are mostly segregated in the amorphous phase and then released to the atmosphere. The lattice parameters are also calculated. Compared with the reference values, slightly greater values are obtained both for IrO2 and for Ir.

引用

页码：511 / 515

页数：5

共 22 条

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