Molecular oxygen interaction with Bi2O3:: a spectroscopic and spectromagnetic investigation

被引：94

作者：

Barreca, D

Morazzoni, F

Rizzi, GA

Scotti, R

Tondello, E

机构：

[1] Univ Padua, Dipartimento Chim Inorgan Met Organ & Analit, CNR, Ctr Studio Stabil & Reattiv Composti Coordinaz, I-35131 Padua, Italy

[2] Univ Milan, Dipartimento Sci Mat, I-20125 Milan, Italy

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2001年 / 3卷 / 09期

关键词：

D O I：

10.1039/b009482j

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：

The interaction of molecular oxygen with polycrystalline Bi2O3 was investigated by infrared (IR) and thermogravimetric (TGA) analyses, X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR). The results indicate the formation of "end-on'' and "bridging'' superoxide species, which are trapped in the beta -Bi2O3 vacant oxygen sites, Bi(iv) and Bi(v) centres also being produced. O-2(-) interacts with Bi(iv) centres giving two superoxide adducts with temperature-dependent relative amounts, Bi(iv)-O-2(-) and Bi(iv)-O-2(-)-Bi(iii), both having a triplet spin state.

引用

页码：1743 / 1749

页数：7

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