论文标题
纳米多孔的Aupt和Auptag合金共催化剂通过在有序的TiO2纳米管表面脱水而形成的纳米型合金催化剂，导致光催化H2的生成显着增强
Nanoporous AuPt and AuPtAg alloy co-catalysts formed by dewetting-dealloying on ordered TiO2 nanotube surface lead to significantly enhanced photocatalytic H2 generation
论文作者
论文摘要
有效的共催化剂对于从水性环境中产生的光催化H2产生至关重要。有吸引力的共催化剂候选者是Aupt（亚稳态）合金，这是由于电荷转移和H2演化过程中成分的协同电子和化学相互作用而导致的。在这里，我们介绍了在间隔TiO2纳米管上制造的纳米质（孔径为2-5 nm）的Aupt合金纳米颗粒的制造。通过脱水，我们形成Auptag合金纳米颗粒。从这些合金中，可以选择性地溶解Ag，导致所需的纳米多孔型合金颗粒，直径在10-70 nm的范围为10-70 nm，作为TIO2纳米管上的梯度。与一体金属或非孔合金的相同负载相比，获得光催化H2的生成的显着增强。纳米多孔的Aupt颗粒不仅提供了较大的表面积与体积比（因此更有效），而且还显示了H2生成的Aupt合金的内在协同作用。
Effective co-catalysts are of key importance for photocatalytic H2 generation from aqueous environments. An attractive co-catalyst candidate are AuPt (metastable) alloys due to the synergistic electronic and chemical interaction of the constituents in the charge transfer and H2 evolution process. Here we introduce the fabrication of AuPt alloy nanoparticles with nanoporosity (pore size of 2-5 nm) fabricated on spaced TiO2 nanotubes. By dewetting a layered AgAuPt coating, we form AuPtAg alloy nanoparticles. From these alloys, Ag can selectively be dissolved leading to the desired nanoporous AuPt alloy particles with diameter in the range of 10-70 nm deposited as a gradient on the TiO2 nanotubes. A significant enhancement of photocatalytic H2 generation is obtained compared to the same loading of monometallic or nonporous alloy. The nanoporous AuPt particles provide not only a large surface area to volume ratio (and are thus more effective) but also show the intrinsic synergy of a AuPt alloy for H2 generation.
