Synthesis of novel aluminum-based alloy hydrides under high pressure and high temperature

新規アルミニウム基合金水素化物の高温高圧合成

齋藤 寛之; 遠藤 成輝; 町田 晃彦; 片山 芳則; 青木 勝敏

Saito, Hiroyuki; Endo, Naruki; Machida, Akihiko; Katayama, Yoshinori; Aoki, Katsutoshi

Aluminum-based alloy hydrides have been explored as lightweight hydrogen storage materials. A few aluminum-based alloys have been reported. For example, F. Gingle et al. have reported SrAlH Zintl phase hydride. YAlH has been synthesized by hydrogenating YAl alloy. These hydrides have been synthesized near ambient pressure. Novel aluminum-alloy hydrides are expected to be synthesized under high pressure and high temperature in which conditions hydrogen becomes extremely reactive and it can reacts with passivated aluminum. In the present study, hydrogenation reactions of aluminum-based alloys were investigated under high pressure and high temperature. The reactions were monitored by in-situ synchrotron radiation X-ray diffraction measurements to clarify its reaction process and to optimize its synthetic conditions.