Although 1,4-bis(phenylthynyl)benzene (DEB) blended with a carbon supported palladium catalyst (Pd/C) is one of the most widely used irreversible hydrogen getter in a closed environment, it is hard to form and easy to burn. To overcome these deficiencies of this powdery DEB-Pd/C hydrogen getter, a DEB-Pd/C/LDPE porous hydrogen absorbing composite has been developed in our group. In the present work, hydrogen absorption aging mechanisms of this porous hydrogen absorbing composite samples are investigated by using a accelerated aging test method, their hydrogen absorption performances are measured by hydrogen absorption experiments, and their aging mechanisms are studied by X-ray diffraction, attenuated total reflection-Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and field emission transmission electron microscope. The results show that both the hydrogen absorption rate and the hydrogen absorption capability of each aging composite sample decrease with the increasing of storage time. The results also show that the decrease of its hydrogen absorption rate is mainly attributed to both the surface migration of its DEB and the surface oxidation of its Pd catalyst, and the decrease of its hydrogen absorption capacity is mainly attributed to the surface migration of its DEB.

虽然 1,4-双(苯基乙炔基)苯 (DEB) 与碳负载钯催化剂 (Pd/C) 共混是封闭环境中使用最广泛的不可逆吸氢剂之一，但它难以形成且易于燃烧。为了克服这种粉末状 DEB-Pd/C 吸氢剂的这些缺陷，我们小组开发了一种 DEB-Pd/C/LDPE 多孔吸氢复合材料。本工作采用加速老化试验方法研究了这种多孔吸氢复合材料样品的吸氢老化机理，通过吸氢实验测量了其吸氢性能，并通过X射线衍射研究了其老化机理，衰减全反射傅里叶变换红外光谱、X 射线光电子能谱和场发射透射电子显微镜。结果表明，随着贮藏时间的增加，各老化复合样品的吸氢速率和吸氢能力均降低。结果还表明,其吸氢率的降低主要归因于其DEB的表面迁移和Pd催化剂的表面氧化,其吸氢能力的降低主要归因于其DEB的表面迁移。 .