【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。更多还原

【Abstract】 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 NaBH₄ 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.NaBH₄ Hydrolysis experiment shows that Sn doping ratio could significantly affect the catalytic activity of the catalyst in NaBH₄ 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.更多还原