Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 11, Issue 5, Pages 1828-1834Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b03797
Keywords
-
Categories
Funding
- MSIP
- Leader Researcher program of the Korean Ministry of Science, ICT and Planning (MSIP) [NRF-2018R1A3B1052042]
- EPSRC [EP/R02927X/1, EP/P024513/1]
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- EPSRC [EP/R02927X/1, EP/P024513/1] Funding Source: UKRI
Ask authors/readers for more resources
Superconductivity near room temperature in the sulfur-hydrogen system arises from a sequence of reactions at high pressures, with X-ray diffraction experiments playing a central role in understanding these chemical-structural transformations and the corresponding S:H stoichiometry. Here we document X-ray irradiation acting as both a probe and as a driver of chemical reaction in this dense hydride system. We observe a reaction between molecular hydrogen (H-2) and elemental sulfur (S-8) under high pressure, induced directly by X-ray illumination, at photon energies of 12 keV using a free electron laser. The rapid synthesis of hydrogen sulfide (H2S) at 0.3 GPa was confirmed by optical observations, spectroscopic measurements, and microstructural changes detected by X-ray diffraction. These results document X-ray induced chemical synthesis of superconductor-forming dense hydrides, revealing an alternative production strategy and confirming the disruptive nature of X-ray exposure in studies on high-pressure hydrogen chalcogenides, from water to high-temperature superconductors.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available