载体结构对Pt/SDB疏水催化剂性能的影响  

Influence of Carrier Structure on Performance of Pt/SDB Hydrophobic Catalysts

作　　者：黄丽[1] HUANG Li(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《当代化工》2024年第6期1357-1362,共6页Contemporary Chemical Industry

摘　　要：为了研究SDB载体结构对催化剂性能的影响,选取3种不同结构的SDB载体,以氯铂酸为前驱体,采用等体积浸渍、高温氢气还原的方法制备Pt/SDB疏水催化剂,研究其在水氢同位素交换反应中的催化活性。用扫描电子显微镜(SEM)、傅里叶红外光谱仪和压汞仪表征载体的外观形貌及孔结构。用透射电镜、电感耦合等离子体质谱仪和X射线衍射仪分析活性组分Pt在疏水催化剂上的分布及结晶状态。结果表明:载体结构差异对前驱体氯铂酸的吸附影响带来明显的竞争吸附效应;载体结构也对Pt晶粒的结晶状态、粒径大小以及聚集状态等有较大影响,孔径为159.63 nm的载体B所制备的催化剂活性最好。In order to study the influence of SDB carrier structure on catalyst performance,three SDB carriers with different structures were selected,and Pt/SDB hydrophobic catalysts were prepared by equal volume impregnation and high temperature hydrogen reduction with chloroplatinic acid as precursor,and their catalytic activity in water-hydrogen isotope exchange reaction was studied.The microscopic appearance and pore structures of the carriers were analyzed by SEM,IR and MI(Mercury injection).And TEM,ICP-MS and XRD were used to test the distribution and crystallization of Pt on hydrophobic catalysts.The catalysts activities were tested by gas-liquid hydrogen isotopes catalytic exchange reaction.The results demonstrated that there was obvious competitive adsorption effect of precursor chloroplatinic acid due to microstructure difference,which also affected the Pt crystalline state,particle size and aggregation performance on the catalysts.The carrier B with more open pores on the surface and 159.63 nm average pore diameter revealed better catalytic performance.

关 键 词：载体结构 疏水催化剂 竞争吸附 催化剂载体 催化 

分 类 号：TQ032.41[化学工程] O643.36[理学—物理化学]