摘要
合成了一种用作前驱体的,具有八面体结构新型水溶性的金属复合离子型化合物碳酸二羟基·四氨合铂(Ⅳ)二水合物([Pt(NH3)4(OH)2]CO3·2H2O),用元素分析和X射线单晶衍射仪(XRD)对其结构进行了表征,用热重-差热(TG-TDA)测试其热分解特性,并对比评价制备DOC催化剂的性能。结果表明,化合物为单斜晶系、P21/c空间群,晶胞参数为:a=0.88191(14)nm,b=1.17817(18)nm,c=1.01533(16)nm,V=0.9978(3)nm^3,Z=4,R1=0.0403,wR2=0.1235,R1=0.0466,wR2=0.1353。其晶体结构为以Pt(Ⅳ)为中心与4个NH3和2个羟基配位形成八面体的二价阳离子;TG-DTA测试显示化合物分解峰出现在223.8℃;制备得到的DOC催化剂催化活性和起燃温度优于传统前驱体化合物。
A new water-soluble,ion-type platinum(Ⅳ)complex,[Pt(NH3)4(OH)2]CO3·2H2O,was synthesized and characterized by the element analysis and single crystal X-ray diffraction.Its thermal decomposition characteristics were characterized by TG-TDA.Its cystal belongs to monoclinic space group P21/c,and its unit cell parameters are:a=0.88191(14)nm,b=1.17817(18)nm,c=1.01533(16)nm and V=0.9978(3)nm^3;Z=4,R1=0.0403,wR2=0.1235,R1=0.0466,wR2=0.1353.The crystal data shows that Pt(Ⅳ)acted as the center ion coordinates with four NH3 in a square planar and two hydroxyl groups in opposite axial position,forming a octahedral bivalent cation.TG-TDA results showed that the peak decomposition temperature was 223.8℃.The prepared diesel oxidation catalysts using the compound have better catalytic activity and light-off temperature than conventional precursors.
作者
余娟
刘俊
巨少英
张阳阳
李艳琼
陈勇
陈力
YU Juan;LIU Jun;JU Shaoying;ZHANG Yangyang;LI Yanqiong;CHEN Yong;CHEN Li(State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals,Kunming Institute of Precious Metals,Kunming 650106,China)
出处
《贵金属》
CAS
CSCD
北大核心
2019年第4期1-6,共6页
Precious Metals
基金
云南省院所技术开发专项(2018DC005)
