Abstract
We have synthesized pyrite-type PtO2 (py-PtO2) at 50-60 GPa and successfully recovered it at 1 bar. The observed O-O stretching vibration in Raman spectra provides direct evidence for inter-oxygen bonding in the structure. We also identified the O-H vibrations in py-PtO2 synthesized from the lowerature areas, indicating hydrogenation, py-PtO2Hx (x ≤ 1). Diffraction patterns are consistent with a range of degrees of hydrogenation controlled by temperature. We found that py-PtO2 has a high bulk modulus, 314 ± 4 GPa. The chemical behaviors found in py-PtO2 have implications for the hydrogen storage in materials with anion-anion bonding, and the geochemistry of oxygen, hydrogen, and transition metals in the deep planetary interiors.
Original language | English (US) |
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Pages (from-to) | 8300-8307 |
Number of pages | 8 |
Journal | Inorganic chemistry |
Volume | 58 |
Issue number | 13 |
DOIs | |
State | Published - Jul 1 2019 |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry