摘要
以葡聚糖为软模板制备了多孔AgRu合金催化剂,利用X射线衍射仪和扫描电镜仪对其结构和形貌进行表征,并研究了其催化性能。结果表明,6种催化剂的催化产氢活性次序为Ag_(9.2)Ru>Ag_(3.6)Ru>Ag_(4.0)Ru>Ag_(13.5)-Ru>Ag_(21.3)Ru>Ag_(22.4)Ru。银钌原子比和催化剂形貌共同影响催化剂性能。其中选用Ag_(9.2) Ru催化剂考察了NaBH_4和NaOH的质量分数对产氢速率的影响,研究结果表明,随NaBH_4和NaOH质量分数的增加,催化产氢速率降低。
Porous Ag-Ru alloy catalysts were synthesized with dextran as soft template. The characterizations of catalysts were studied by XRD and SEM, and the activity on hydrogen generation rate decreased in the following order Ag9.2 Ru〉Ag3. 6 Ru〉Ag4.0 Ru;〉Ag13. 5 Ru〉Ag21.3 Ru〉Ag22. 4 Ru. The performance of the catalysts was influenced by the atom ratio of Ag to Ru and catalyst form. The influences of concentration of NaBH4 and NaOH on hydrogen gene- ration rate with Agg. 2 Ru catalyst were studied, indicating that the hydrogen generation rate decreases as the concentra- tion of NaBH4 and NaOH raising.
关键词
银钌合金
硼氢化钠
催化水解
Ag-Ru alloys, sodium borohydride, catalytic hydrolysis
