用于水氢同位素交换的非均匀型分布Pt/SDB疏水催化剂  

Pt/SDB hydrophobic catalyst with nonuniformity distribution of Pt for hydrogen isotopes exchange reaction

作　　者：黄丽[1] 吴栋[1] 刘亚明[1] HUANG Li;WU Dong;LIU Yaming(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：《工业催化》2025年第1期64-69,共6页Industrial Catalysis

摘　　要：以聚苯乙烯-二乙烯基苯(SDB)为载体,先用竞争吸附剂对载体进行预处理,然后经浸渍、干燥和氢气高温还原工艺制备Pt/SDB疏水催化剂。采用X射线衍射(XRD)、扫描电镜(SEM)联合EDS能谱仪、透射电镜(TEM)和X射线光电子能谱(XPS)等对催化剂进行表征。结果表明,催化剂具有显著的蛋壳型特征,其活性组分Pt主要分布在载体0.12 mm的浅表层,前驱体氯铂酸得到较充分的还原,与均匀型催化剂相比,提高了催化剂的催化活性和贵金属的利用率。In order to improve catalyst activity meanwhile to reduce the precious metal usage,a nonuniformity hydrophobic catalyst is prepared by impregnation and hydrogen reduction method with pretreated SDB(Polystyrene divinylbence)resin using competitive adsorbent.The investigation results of the catalysts from SEM and EDS show typical characteristic of eggshell type.Compared to the uniformity catalyst,the active component Pt of the new catalyst exists in the surface as 0.12 mm depth.As the special distribution condition,the precursor chloroplatinic acid has been fully reduced to Pt metal by hydrogen from XPS results.The Pt utilization efficiency and catalytic performance of the nonuniformity catalyst are improved significantly compared with conditional unifrom catalyst.

关 键 词：催化化学 疏水催化剂 Pt/SDB 水氢交换 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]