Synchrotron X-ray diffraction techniques for in situ measurement of hydride formation under several gigapascals of hydrogen pressure

作     者：Hiroyuki Saitoh Akihiko Machida Katsutoshi Aoki 

作者机构：Quantum Beam Science Directorate Japan Atomic Energy Agency Sayo-cho Sayo-gun Hyogo 679-5148 Japan Institute for Materials Research Tohoku University Aoba-kuSendai 980-8577 Japan 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2014年第59卷第36期

页      面：5290-5301页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：partially supported by New Energy and Industrial Technology Development Organization(NEDO)under‘‘Advanced Fundamental Research Project onHydrogen Storage Materials’’ ‘‘Feasibility Study on AdvancedHydrogen Storage Materials for Automotive Applications(2012)’’,bythe Ministry of Education,Culture,Sports,Science and Technology(MEXT)under the‘‘Photon and Quantum Basic Research Coordinated Development Program’’,and by Japan Society for the Promotion of Science(JSPS)KAKENHI(25220911,24241032,and25420725).The synchrotron radiation experiments were performed atBL14B1 of SPring-8 with the approval of Japan Atomic EnergyAgency(JAEA)(2011B3602 and 2012B3602) 

主　　题：X射线衍射技术 金属氢化物 原位测量 氢气压力 同步加速器 同步辐射X射线衍射 高压技术 晶体生长过程 

摘      要：The high-pressure technique is a fundamental tool for realizing novel phase transitions, chemical reactions, and other exotic phenomena. Hydrogenation is one example of a high-pressure reaction; at high pressures of several gigapascals, hydrogen becomes chemically active and reacts with metals and alloys to form hydrides. This paper covers a high-pressure study of the hydrogenation process and the synthesis of hydrides using a cubic-type multi-anvil apparatus. The experimental details of a hydrogenation cell assembly, high-temperature and highpressure generation, and an in situ observation technique are presented. These experiments are conducted with the aid of in situ synchrotron radiation X-ray diffraction measurements operated in an energy-dispersive mode in the conventional manner for time-resolved measurements and a newly developed angle-dispersive mode for observation of the crystal growth process during formation of metal hydrides. Two successful cases of high-pressure hydrogenation are presented: aluminum hydride, Al H3, and an aluminum-based alloy hydride, Al2 Cu Hx, which are potential candidates for hydrogen storage materials.