论文标题
在阳极生长过程中，在O2纳米管上形成高度活跃，同质合金的Aupt Aupt共催化剂装饰
Forming a highly active, homogeneously alloyed AuPt co-catalyst decoration on O2 nanotubes directly during anodic growth
论文作者
论文摘要
AU和PT不会形成同质的散装合金，因为它们在热力学上不可混乱。但是，我们表明，阳极TIO $ _2 $纳米管（NTS）可以在其阳极生长过程中用同质的Aupt Aloy纳米颗粒（NP）均匀地装饰。为此，使用含有低量的溶解Au（0.1 at％）和Pt（0.1 at％）的金属Ti基板用于阳极氧化。在氧化物/金属界面在直接贵族金属颗粒形成以及Au和Pt的合金中，将基质金属（Ti）转换为氧化物。然后，不断地通过生长的纳米管壁捡起这些颗粒。在我们的实验中，AUPT合金NP的平均大小为4.2 nm，在阳极过程结束时，定期分散在TIO $ _2 $纳米管上。这些合金的Aupt颗粒在光催化H2生成中充当出色的共催化剂 - 在太阳光下H2产生12.04μlH-1。与用Au（7μLH-1）或PT（9.96μlH-1）装饰的TiO $ _2 $ nts相比，这代表了强烈增强的活动。
Au and Pt do not form homogeneous bulk alloys as they are thermodynamically not miscible. However, we show that anodic TiO$_2$ nanotubes (NTs) can in-situ be uniformly decorated with homogeneous AuPt alloy nanoparticles (NPs) during their anodic growth. For this, a metallic Ti substrate containing low amounts of dissolved Au (0.1 at%) and Pt (0.1 at%) is used for anodizing. The matrix metal (Ti) is converted to oxide while at the oxide/metal interface direct noble metal particle formation and alloying of Au and Pt takes place; continuously these particles are then picked up by the growing nanotube wall. In our experiments the AuPt alloy NPs have an average size of 4.2 nm and, at the end of the anodic process, are regularly dispersed over the TiO$_2$ nanotubes. These alloyed AuPt particles act as excellent co-catalyst in photocatalytic H2 generation - with a H2 production of 12.04 μL h-1 under solar light. This represents a strongly enhanced activity as compared with TiO$_2$ NTs decorated with monometallic particles of Au (7 μL h-1) or Pt (9.96 μL h-1).
