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arXiv 0907.2128cond-mat.mtrl-sci
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高压下过渡金属氧化物的形成

Formation of transition metal hydrides at high pressures

Olga Degtyareva, John E. Proctor, Christophe Guillaume, Eugene Gregoryanz, Michael Hanfland

摘要:

硅烷(SiH4)被发现(部分)分解,在室温下,在50 GPa以上的压力,纯Si和H2。所释放的氢与金刚石砧座单元中周围的金属反应以形成金属氧化物。在硅烷分解后观察到氢化物的形成。根据先前实验报告的数据(Ehrts等人,Science 319,1506(2008)),所要求保护的硅烷的高压金属和超导相被鉴定为氢化铂,其在硅烷分解后形成。这些观察结果表明,考虑可能的化学反应的重要性,这些反应在高压实验中经常被忽视。

英文摘要:

Silane (SiH4) is found to (partially) decompose at pressures above 50 GPa at room temperature into pure Si and H2. The released hydrogen reacts with surrounding metals in the diamond anvil cell to form metal hydrides. A formation of rhenium hydride is observed after the decomposition of silane. From the data of a previous experimental report (Eremets et al., Science 319, 1506 (2008)), the claimed high-pressure metallic and superconducting phase of silane is identified as platinum hydride, that forms after the decomposition of silane. These observations show the importance of taking into account possible chemical reactions that are often neglected in high-pressure experiments.

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