纳米SnO/Ti电极电催化还原KBO_2制备KBH_4  

Preparation of KBH_4 by Electrocatalytic Reduction of KBO_2 at a Nano SnO/Ti Electrode

作　　者：朱传高[1] 王凤武[1] 徐迈[1] 

机构地区：[1]淮南师范学院化学系,安徽淮南232001

出　　处：《吉林大学学报（理学版）》2012年第5期1037-1040,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:21176099);安徽省教育厅自然科学基金重点项目(批准号:KJ2010A309)

摘　　要：先在乙二醇中电解锡片,制备得到锡醇盐配合物,再将电解液水解后凝胶,在钛丝表面通过提拉法涂抹、300℃煅烧2 h制备得到纳米SnO/Ti电极.在0.3～1.2 mol/L KOH+0.2～0.8 mol/L KBO2的溶液中测试SnO/Ti电极的催化还原性能,研究影响电解还原KBO2的主要因素,并通过X射线衍射(XRD)和透射电子显微镜(TEM)表征SnO/Ti电极和KBH4的结构.结果表明,纳米SnO/Ti电极表面颗粒分散均匀,修饰电极催化性能较好,放电电流增大,产率和电流效率分别为16.9%和29.2%.Tin alkoxide complex was prepared by electrochemical dissolution of pure tin in the glycol solution, followed by the direct sol-gel process of electrolyte solution. The SnO sol coated on pure titanium substrate was calcined at 300 ℃ for 2 h in a muffle furnace. The electro-catalytic reduction performance of nano SnO/Ti electrode was investigated in the 0.3 - 1.2 mol/L KOH ＋ 0.2 - 0.8 mol/L KBO2 solution. The main factors of electro-catalytic reduction of KBOa such as KBO2 and KOH concentrations and so on were studied. The monodisperse structure and the diameter of nano SnO/Ti electrode were observed by XRD and TEM. The results show that the nano SnO uniformly dispersed on the electrode surface. The electro-catalytic reduction performance of nano SnO/Ti electrode is stable. A yield of 16.9% and a current efficiency of 29.2% were respectively obtained.

关 键 词：电催化还原 纳米SnO/Ti电极 硼氢化钾 电流效率 

分 类 号：O646[理学—物理化学]