Mg_(2)Ni_(0.75)Cu_(0.25)-Mg_(1.76)体系的合成及氢化过程的初步研究  

Replacement-Diffusion Method for Mg_(2)Ni_(0.75)Cu_(0.25)-Mg_(1.76) and Related Hydrogenation

作　　者：张允什[1] 陈声昌[1] 袁华堂[1] 封显抱 郑松 Zhang Yunshi;Chen Shengchang;Yuan Huatang;Feng Xianbao;Zheng Song(Department of Chemistry,Nankai University,Tianjin)

机构地区：[1]南开大学化学系

出　　处：《高等学校化学学报》1988年第11期1173-1175,共3页Chemical Journal of Chinese Universities

基　　金：中国科学院科学基金。

摘　　要：Leilly、Rudmen和本研究组分别对Mg_(2)Ni-xMg,Mg_(2)Cu-xMg体系进行了研究,巳发现Mg_(2)Ni或Mg_(2)Cu的存在对镁的氢化,释氢过程有催化作用,并描述了二元合金Mg_(2)Ni,Mg_(2)Cu对Mg的吸、放氢过程的催化氢化、脱氢模型。但有关三元合金对纯镁的吸、放氢催化性能研究,至今未见报道。我们合成了在基质镁粒表面包覆Mg_(2)Ni_(0.75) Cu_(0.25)的新型材料,并研究此三元合金表面对所包覆的Mg核与H2之间反应的影响。Replacement-diffusion method is reported to prepare Mg_(2)Ni_(0.75)Cu_(0.25)Mg_(1.76) alloy. Surfaces of the alloy particles have been investigated- by AES. It has been found that Ni and Cu are greatly enriched on their surfaces. The under layer of the particles are Mg.The study of the hydrogen adsorption and desorption process for the alloy was carried out. The catalytic activity of Mg_(2)Ni_(0.75)Cu_(0.85) in the hydro-genation of Mg was observede.A model was suggested to describe the hydrogenation-dehydrogenation of Mg,Ni_(0.75)Cu_(0.25)-XMg system.

关 键 词：储氢材料 置换-扩散法 镁镍铜三元储氢合金 

分 类 号：TG1[金属学及工艺—金属学]