公开(公告)号：US06964936B1

公开(公告)日：2005-11-15

申请号：US10383672

申请日：2003-03-06

申请人： Dwight R. Jennison

发明人： Dwight R. Jennison

IPC分类号： B01J20/00 ,  B01J21/00 ,  B01J21/04 ,  B01J23/00 ,  B01J23/04 ,  B01J23/10 ,  B01J23/20 ,  B01J23/38 ,  B01J23/70 ,  B01J31/00 ,  B01J35/00 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  B01J37/34

CPC分类号： B01J23/70 ,  B01J21/04 ,  B01J23/04 ,  B01J23/10 ,  B01J23/20 ,  B01J23/38 ,  B01J35/002 ,  B01J35/0046 ,  B01J37/0209 ,  B01J37/341 ,  B01J37/349

摘要： A method of making a catalyst with monolayer or sub-monolayer metal by controlling the wetting characteristics on the support surface and increasing the adhesion between the catalytic metal and an oxide layer. There are two methods that have been demonstrated by experiment and supported by theory. In the first method, which is useful for noble metals as well as others, a negatively-charged species is introduced to the surface of a support in sub-ML coverage. The layer-by-layer growth of metal deposited onto the oxide surface is promoted because the adhesion strength of the metal-oxide interface is increased. This method can also be used to achieve nanoislands of metal upon sub-ML deposition. The negatively-charged species can either be deposited onto the oxide surface or a compound can be deposited that dissociates on, or reacts with, the surface to form the negatively-charged species. The deposited metal adatoms can thereby bond laterally to the negatively-charged species as well as vertically to the oxide surface. Thus the negatively-charged species serve as anchors for the metal. In the second method, a chemical reaction that occurs when most metals are deposited on a fully hydroxylated oxide surface is used to create cationic metal species that bind strongly both to the substrate and to metallic metal atoms. These are incorporated into the top layer of the substrate and bind strongly both to the substrate and to metallic metal atoms. In this case, these oxidized metal atoms serve as the anchors. Here, as in the previous method, nanoislands of catalytic metal can be achieved to increase catalytic activity, or monolayers or bilayers of reactive metal can also be made.

摘要翻译： 通过控制载体表面上的润湿特性并增加催化金属和氧化物层之间的粘附性来制备具有单层或亚单层金属的催化剂的方法。 实验证明有两种方法，由理论支持。 在对贵金属以及其它物质有用的第一种方法中，带负电荷的物质在子ML覆盖范围内引入支持体的表面。 由于金属 - 氧化物界面的粘合强度增加，因此促进沉积在氧化物表面上的金属层的逐层生长。 该方法也可用于在次ML沉积时实现金属的纳米级。 带负电荷的物质可以沉积在氧化物表面上，或者可以沉积化合物，其与表面分离或与表面反应以形成带负电荷的物质。 因此，沉积的金属原子可以侧向地与带负电的物质以及垂直于氧化物表面结合。 因此，带负电荷的物质用作金属的锚点。 在第二种方法中，当大部分金属沉积在完全羟基化的氧化物表面上时发生的化学反应被用于产生强烈地结合到基底和金属金属原子的阳离子金属物质。 这些被结合到衬底的顶层中并且牢固地结合到衬底和金属金属原子。 在这种情况下，这些氧化的金属原子用作锚。 这里，如前所述，可以实现催化金属的纳米级以提高催化活性，也可以制备单层或双层的反应性金属。

公开(公告)号：US06790476B1

公开(公告)日：2004-09-14

申请号：US10154224

申请日：2002-05-21

申请人： Dwight R. Jennison ,  Alexander Bogicevic ,  Jeffry A. Kelber ,  Scott A. Chambers

发明人： Dwight R. Jennison ,  Alexander Bogicevic ,  Jeffry A. Kelber ,  Scott A. Chambers

IPC分类号： C23C1606

CPC分类号： C23C14/185 ,  C23C14/024

摘要： A method of controlling the wetting characteristics and increasing the adhesion between a metal and an oxide layer. By introducing a negatively-charged species to the surface of an oxide layer, layer-by-layer growth of metal deposited onto the oxide surface is promoted, increasing the adhesion strength of the metal-oxide interface. The negatively-charged species can either be deposited onto the oxide surface or a compound can be deposited that dissociates on, or reacts with, the surface to form the negatively-charged species. The deposited metal adatoms can thereby bond laterally to the negatively-charged species as well as vertically to the oxide surface as well as react with the negatively charged species, be oxidized, and incorporated on or into the surface of the oxide.

摘要翻译： 控制润湿特性并增加金属和氧化物层之间的粘附性的方法。 通过向氧化物层的表面引入带负电荷的物质，促进沉积在氧化物表面上的金属逐层生长，增加金属氧化物界面的粘合强度。 带负电荷的物质可以沉积在氧化物表面上，或者可以沉积化合物，其与表面分离或与表面反应以形成带负电荷的物质。 沉积的金属吸附原子因此可以侧向地连接到带负电的物质以及垂直于氧化物表面，并且与带负电的物质反应，被氧化并且结合到氧化物的表面上或其中。