具有抗氧化性的Al-Bi(C_(2)H_(5)OH)_(3)-C多孔块体制氢材料  

Al-Bi(C_(2)H_(5)OH)_(3)-C Oxidation-resistant Bulk Materials for Hydrogen Generation

作　　者：武金帆 徐芬[1] 孙立贤[1] 廖鹿敏 管彦洵 WU Jinfan;XU Fen;SUN Lixian;LIAO Lumin;GUAN Yanxun(School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,Guangxi,China;School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin 541004,Guangxi,China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]桂林电子科技大学电子工程与自动化学院,广西桂林541004

出　　处：《材料导报》2025年第8期140-145,共6页Materials Reports

基　　金：国家自然科学基金(52271205,U20A20237,52371218,52101245);广西科技研发基金(AA19182014);广西重点研发项目(2021AB17045);桂林市科学技术研究开发项目(20210102-4);广西八桂学者基金;漓江学者基金;广西新能源材料结构与性能协同创新中心;中德合作项目(GZ1528)。

摘　　要：为改善铝(Al)基复合材料的产氢性能,以乙酸铋(Bi(C_(2)H_(5)OH)_(3))和不同碳材料为添加剂,利用高能球磨结合放电等离子烧结(SPS)技术制备了Al-Bi(C_(2)H_(5)OH)_(3)-C多孔块体制氢材料。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、射线光电子能谱(XPS)和拉曼光谱(Raman)对样品进行了表征,并探究了铝基块体制氢材料的产氢效率、抗氧化性能及添加剂提高Al水解活性的作用机理。研究结果显示在333.15 K下,Al5%Bi(C_(2)H_(5)OH)_(3)3%CNTs(如无特别说明,均为质量分数)块体材料具有高的反应活性,产氢量达到了1275.4 mL·g^(-1),比粉体材料高31.7%。尤其是连续暴露在空气中30天后,块体材料的产氢量仍达到921.5 mL·g^(-1),而粉体材料基本不产氢,证明SPS处理显著提高了Al基材料的抗氧化性能。XRD和SEM结果表明,SPS的处理使Al颗粒表面产生了裂痕,且Bi(C_(2)H_(5)OH)_(3)分解产生的气体使铝基块体材料内部形成多孔结构,它们促进了Al与水的接触。同时,原位形成的Bi_(2)O_(3)和Bi与具有更多缺陷的碳纳米管(CNTs)协同作用是块体材料产氢性能提高的另一个因素。For improving the hydrogen production performance of Al-based composites,Al-Bi(C_(2)H_(5)OH)_(3)-C bulk hydrogen generation materials were prepared by high-energy ball milling and spark plasma sintering(SPS),using bismuth acetate(Bi(C_(2)H_(5)OH)_(3))and different carbon mate-rials as additives.The samples were characterized by X-ray photoelectron spectroscopy(XRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS)and Raman spectroscopy.Moreover,the efficiency of hydrogen generation and oxidation resistance of the Al-based bulk materials as well as the action mechanism of additives for increasing hydrolytic activity of Al were investigated.The results demonstrate that Al-5%Bi(C_(2)H_(5)OH)_(3)-3%CNTs(if not specified,are mass fraction)bulk material has high reactivity,and its hydrogen yield reaches 1275.4 mL·g^(-1)at 333.15 K,which is 31.7%higher than the powder material.And the hydrogen yield of the bulk material still holds 921.5 mL·g^(-1)after exposed to the air for 35 days,while the powder material basically do not produce hydrogen.It proves that the SPS treatment significantly enhances the oxidation resistance of aluminum-based materials.The XRD and SEM analysis displays that the treatment of SPS causes cracks on the surface of Al particles,as well as the gas by the decomposition of Bi(C_(2)H_(5)OH)_(3) leads to the formation of a porous structure inside the Al-based bulk.They facilitate contact between Al and water.Meanwhile,the synergistic effect of CNTs(Carbon nanotubes)with more defects and in-situ formed Bi_(2)O_(3) and Bi is another factor that improves the hydrogen production performance of the bulk materials.

关 键 词：铝基块体制氢材料 产氢性能 抗氧化性能 放电等离子烧结技术 碳纳米管 

分 类 号：O643.3[理学—物理化学] TB333[理学—化学]