Photothermal-chemical synthesis of P-S-H ternary hydride at high pressures
Tingting Ye(叶婷婷)1,2, Hong Zeng(曾鸿)1,2, Peng Cheng(程鹏)1,2, Deyuan Yao(姚德元)1,2, Xiaomei Pan(潘孝美)1,2, Xiao Zhang(张晓)1,3,†, and Junfeng Ding(丁俊峰)1,2,‡
1 Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China; 3 Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract The recent discovery of room temperature superconductivity (283 K) in carbonaceous sulfur hydride (C-S-H) has attracted much interest in ternary hydrogen rich materials. In this report, ternary hydride P-S-H was synthesized through a photothermal-chemical reaction from elemental sulfur (S), phosphorus (P) and molecular hydrogen (H2) at high pressures and room temperature. Raman spectroscopy under pressure shows that H2S and PH3 compounds are synthesized after laser heating at 0.9 GPa, and a ternary van der Waals compound P-S-H is synthesized with further compression to 4.6 GPa. The P-S-H compound is probably a mixed alloy of PH3 and (H2S)2H2 with a guest-host structure similar to the C-S-H system. The ternary hydride can persist up to 35.6 GPa at least and shows two phase transitions at approximately 23.6 GPa and 32.8 GPa, respectively.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 52002372, 51672279, 51727806, 11874361, and 11774354), Science Challenge Project (Grant No. TZ2016001), and Chinese Academy of Sciences Innovation Grant (Grant No. CXJJ-19-B08).
Tingting Ye(叶婷婷), Hong Zeng(曾鸿), Peng Cheng(程鹏), Deyuan Yao(姚德元), Xiaomei Pan(潘孝美), Xiao Zhang(张晓), and Junfeng Ding(丁俊峰) Photothermal-chemical synthesis of P-S-H ternary hydride at high pressures 2022 Chin. Phys. B 31 067402
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