Symmetrization and Chemical Precompression Effect of Hydrogen-Bonds in H_2-H_2O System

	Symmetrization and Chemical Precompression Effect of Hydrogen-Bonds in H_2-H_2O System
	Jiang Shuqing 1; Yang Xue 1; Wang Yu 1; Zhang Xiao 1; Cheng Peng 1
刊名	Chinese Journal of High Pressure Physics
	2019
卷号	33
关键词	高压氢键对称化氢水化合物
ISSN号	1000-5773
其他题名	Symmetrization and Chemical Precompression Effect of Hydrogen-Bonds in H_2-H_2O System
英文摘要	Hydrogen hydrate(H_2-H_2O) excited significant interest as an environmentally clean and efficient hydrogen storage material. Here we conducted a high-pressure experimental research on hydrogen hydrate combined with in-situ Raman spectroscopy and synchrotron X-ray diffraction measurements. Our results indicated that the cubic C_2 phase with stoichiometry 1∶1 of H_2 and H_2O transformed to a new tetragonal phase C_3 after packing more hydrogen molecules above 24.5 GPa. The structure of C_3 was determined to be P41 with a 1∶2 ratio of H_2O to H_2,and could survive down to 8.6 GPa upon decompression. Two districted behaviors of guest hydrogen clusters were observed with increasing pressure. One showed blue-red frequency shift transition similarly as pure hydrogen, the other continuously blue-shifted to higher frequencies in the whole pressure range. Fermi resonance between the deformational mode and softened stretching mode was firstly detected, indicating that the hydrogen-bond was symmetrized at around 55 GPa. The complicated behaviors of hydrogen molecules and interactions with water molecules in hydrogen hydrate provided a different insight into the guest-host system under pressure.
语种	英语
CSCD记录号	CSCD:6474405
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/57752]
专题	中国科学院合肥物质科学研究院
作者单位	1.Institute of Solid State Physics, Chinese Academy of Sciences 2.Institute of Solid State Physics, Chinese Academy of Sciences 3.Institute of Solid State Physics, Chinese Academy of Sciences 4.Institute of Solid State Physics, Chinese Academy of Sciences 5.Institute of Solid State Physics, Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Jiang Shuqing,Yang Xue,Wang Yu,et al. Symmetrization and Chemical Precompression Effect of Hydrogen-Bonds in H_2-H_2O System[J]. Chinese Journal of High Pressure Physics,2019,33.
APA	Jiang Shuqing,Yang Xue,Wang Yu,Zhang Xiao,&Cheng Peng.(2019).Symmetrization and Chemical Precompression Effect of Hydrogen-Bonds in H_2-H_2O System.Chinese Journal of High Pressure Physics,33.
MLA	Jiang Shuqing,et al."Symmetrization and Chemical Precompression Effect of Hydrogen-Bonds in H_2-H_2O System".Chinese Journal of High Pressure Physics 33(2019).