An Anhydrous High-pressure Synthesis Route to Rutile Type RhO2
An Anhydrous High-pressure Synthesis Route to Rutile Type RhO2
复制标题
金红石型RhO2的无水高压合成路线
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Valldor
中科院分区：
文献类型：
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作者：
G. Demazeau;A. Baranov;R. Pöttgen;L. Kienle;M. H. Möller;R. Hoffmann;M. Valldor
开发了金红石型RhO2无水高压合成新路线。氯化铑(III)与Na2O2在600℃、200MPa的氧气压力下反应，生成RhO2和NaCl。 X射线粉末衍射仪数据和TEM观察证实了金红石结构：P42/mnm，a = 448.7(1)，c = 308.9(1) pm，x(O) = 0.3125(8)，导致在稍微拉长的八面体中Rh-O距离为195.0 (4x)和198.3 pm (2x)。与氧空位产生相关的结构转变可以通过电子束加热引发。
A new anhydrous high-pressure synthesis route was developed for rutile type RhO2. Rhodium(III) chloride was reacted with Na2O2 at 600 °C under an oxygen pressure of 200 MPa yielding RhO2 and NaCl. X-ray powder diffractometer data and TEM observations confirmed the rutile structure: P42/mnm, a = 448.7(1), c = 308.9(1) pm, x(O) = 0.3125(8), leading to Rh-O distances of 195.0 (4x) and 198.3 pm (2x) in the slightly elongated octahedra. Structural transformations associated with the production of oxygen vacancies can be initiated by electron-beam heating.