Although the excellent properties of borides have attracted the attention of the industry, their limited<br>preparation process and difficult-to-remove impurities have prevented them from exerting their full<br>effectiveness. However, it is very difficult to separate AlB12 and Al2O3 prepared by self-propagating high<br>temperature synthesis. This study is the first time to separate the two by electrolysis process and observe<br>their electrolytic behavior. The results show that Al2O3 is converted into micron-sized aluminum during the<br>electrolysis process, while AlB12 still exists intact. This result provides a novel idea for the future purification<br>of borides containing Al2O3 impurities <br>