Sn掺杂CoB催化剂的制备及其NaBH_(4)水解制氢催化性能  

Preparation of Sn-doped CoB catalyst and its catalytic properties in hydrogen production from NaBH_(4) hydrolysis

作　　者：宋春虎 陈一莹 田亚萍 刘青翠 李芳[1] 李其明[1] SONG Chunhu;CHEN Yiying;TIAN Yaping;LIU Qingcui;LI Fang;LI Qiming(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001

出　　处：《应用化工》2024年第9期2043-2047,共5页Applied Chemical Industry

基　　金：国家自然科学基金项目(21703091);辽宁省教育厅资助项目(LJKMZ20220724,JYTMS20231442);辽宁科技厅计划指导项目(2019-ZD-0058)。

摘　　要：利用液相共还原法制备了一种Sn掺杂的Co-Sn-B非晶催化剂,研究该催化剂在NaBH4水解制氢中的催化活性。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)等分析了Sn掺杂对Co-Sn-B催化剂微观结构、表面形貌、元素价态等的影响。结果表明,Sn掺杂摩尔比低于5.0%时,Co-Sn-B催化剂保持了良好的非晶态结构,Sn的引入可以显著提高催化剂的分散度并能有效抑制粒子团聚。NaBH4水解制氢实验表明,过渡金属Sn掺杂比例可以显著影响催化剂的水解制氢催化活性,当Sn掺杂比例为1.0%时,Co-Sn-B催化剂展示出最佳催化活性,同时其稳定性也明显高于未经Sn掺杂的CoB催化剂。Sn-Doped amorphous Co-Sn-B catalysts were prepared by liquid phase co-reduction method.The catalytic activity of Co-Sn-B in hydrogen production from NaBH_(4) hydrolysis was studied systematically.X-ray diffraction(XRD),scanning electron microscopy(SEM)and X-ray photoelectron spectroscopy(XPS)were used to analyze the effect of Sn doping on the microstructure,surface morphologies and valence state of Co-Sn-B catalyst.The results show that the Co-Sn-B catalyst maintains a good amorphous structure when the molar ratio of Sn doping is lower than 5.0%,and the introduction of Sn can significantly improve the dispersion of the catalyst and effectively inhibit the agglomeration of particles.NaBH_(4) Hydrolysis experiment shows that Sn doping ratio could significantly affect the catalytic activity of the catalyst in NaBH_(4) hydrolysis.When the Sn doping ratio is 1.0%,Co-Sn-B catalyst shows the best catalytic activity.More important is that the catalytic stability of Co-Sn-B is much higher than that of CoB catalyst without the doping of Sn.

关 键 词：制氢 硼氢化钠 掺杂 催化剂 水解 

分 类 号：TQ316.2[化学工程—高聚物工业] O643.3[理学—物理化学]