本文以1-丁烯在水蒸汽存在下选择性氧化制甲乙酮为典型反应,利用 XRD,ESR,IR,XPS,TEM 和 SEM 研究了 Sn-Mo 氧化物的结构与活性的关系.制备了8个样品,A,B,C,D,E,F,G 和 H 的 Mo/(Mo+Sn)分别为0,0.1,0.2,0.4,0.6,0.8,0.9,1.0.根据结构特...本文以1-丁烯在水蒸汽存在下选择性氧化制甲乙酮为典型反应,利用 XRD,ESR,IR,XPS,TEM 和 SEM 研究了 Sn-Mo 氧化物的结构与活性的关系.制备了8个样品,A,B,C,D,E,F,G 和 H 的 Mo/(Mo+Sn)分别为0,0.1,0.2,0.4,0.6,0.8,0.9,1.0.根据结构特征,可将 Sn-Mo 氧化物分为三组:第Ⅰ组 Mo/(Mo+Sn)≤0.2;第Ⅱ组0.2<Mo/(Mo+Sn)<0.8;第Ⅲ组 Mo/(Mo+Sn)≥0.8.催化剂Ⅰ是 Mo 取代 SnO_2晶格中部分 Sn 形成置换型固溶体,具有阳离子空穴结构.催化剂Ⅲ是 Sn 掺杂在 MoO_3晶格中形成嵌入型固溶体,具有氧离子空穴结构.催化剂Ⅲ中的晶格氧比催化剂Ⅰ的具有更高的活动性和反应活性,因此催化活性较催化剂Ⅰ高,而选择性较催化剂Ⅰ低.Sn-Mo 氧化物固溶体的类型及晶格缺陷决定了氧化物的催化性质.展开更多
As a new type of catalysts, great attention has been paid to the study of heteropolyacids （HPA） and their salts iu recent yearst. The physicochemical properties and the catalytic activities of PHA have been examined...As a new type of catalysts, great attention has been paid to the study of heteropolyacids （HPA） and their salts iu recent yearst. The physicochemical properties and the catalytic activities of PHA have been examined in our laboratory systematically. In this note the influence of coordinated atoms W and Mo on physicochemical properties of the HPA series, H3PMo12-nWnO40 （n=0—12）, has been studied.展开更多
文摘本文以1-丁烯在水蒸汽存在下选择性氧化制甲乙酮为典型反应,利用 XRD,ESR,IR,XPS,TEM 和 SEM 研究了 Sn-Mo 氧化物的结构与活性的关系.制备了8个样品,A,B,C,D,E,F,G 和 H 的 Mo/(Mo+Sn)分别为0,0.1,0.2,0.4,0.6,0.8,0.9,1.0.根据结构特征,可将 Sn-Mo 氧化物分为三组:第Ⅰ组 Mo/(Mo+Sn)≤0.2;第Ⅱ组0.2<Mo/(Mo+Sn)<0.8;第Ⅲ组 Mo/(Mo+Sn)≥0.8.催化剂Ⅰ是 Mo 取代 SnO_2晶格中部分 Sn 形成置换型固溶体,具有阳离子空穴结构.催化剂Ⅲ是 Sn 掺杂在 MoO_3晶格中形成嵌入型固溶体,具有氧离子空穴结构.催化剂Ⅲ中的晶格氧比催化剂Ⅰ的具有更高的活动性和反应活性,因此催化活性较催化剂Ⅰ高,而选择性较催化剂Ⅰ低.Sn-Mo 氧化物固溶体的类型及晶格缺陷决定了氧化物的催化性质.
文摘As a new type of catalysts, great attention has been paid to the study of heteropolyacids （HPA） and their salts iu recent yearst. The physicochemical properties and the catalytic activities of PHA have been examined in our laboratory systematically. In this note the influence of coordinated atoms W and Mo on physicochemical properties of the HPA series, H3PMo12-nWnO40 （n=0—12）, has been studied.
