Investigation and design of Al-based self-assembly powders for hydrogen generation
Aluminum-water reaction has been recognized as a promising candidate for H2 generation for decades.However, the efficiency of H2 generation is limited significantly by the dense passive oxide layer on the surface of aluminum and its alloys.In this study, a novel Al-based self-assembly composite powders were prepared by gas atomization method and then collected in air environment.The result shows that the powders can directly react with the distilled water and produce hydrogen at room temperature.Particularly,the 80Al-10Bi-10Sn wt.％ powders form novle self-assembly core/shell microstructures with cracked surface and (Bi, Sn)-rich phase distributing on the Al grain boundaries.As a result, the 80Al-10Bi-10Sn wt.％ powders have favorable oxidation resistance and can react with the distilled water violently even at 0℃, the hydrogen conversion yield of this powder at 30℃ achieves 91.30％ within 16 minutes with no incubation time.Moreover, The hydrogen pruduced by this powder could be directly used in proton exchange membrane fuel cells.
Yuheng Liu Xingjun Liu Tao Yang Shuiyuan Yang Cuiping Wang
Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China
国内会议
桂林
英文
106-106
2015-11-03（万方平台首次上网日期，不代表论文的发表时间）