Bimetallic AuPd plasmonic photocatalyst is a promising candidate for catalyzing selective oxidation of aromatic alcohol. However, developing a simple one-step method for the preparation of free-standing AuPd nanostructures with excellent photocatalytic performance remains a huge challenge. Here, a facile liquid–liquid interface route was exploited to one-pot prepare free-standing AuPd alloy nanowires (NWs) under mild conditions. Specifically, Au1Pd1 NWs are grown via oriented attachment at chloroform-water interface and 40 °C with Na2PdCl4 and HAuCl4 as precursors and 1-naphthol as reductant. Au1Pd1 NWs possess many advantages, such as thin diameter (4.0 nm), large aspect ratio, abundant defects and strong Au-Pd electronic interaction. During benzyl alcohol oxidation to benzaldehyde, Au1Pd1 NWs exhibit excellent photocatalytic activity and durability. At 40 min of visible light illumination, 98 % conversion of benzyl alcohol and 100 % selectivity to benzaldehyde are finished. After five cycles, Au1Pd1 NWs still maintain high photocatalytic activity. Compared to pure Au NWs, alloying Pd with Au in Au1Pd1 NWs dramatically enhances photocatalytic activity. The results indicate that the generated abundant •O2– under illumination play an important role in significantly improving benzyl alcohol oxidation to benzaldehyde.

中文翻译：

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简便的界面合成薄金钯合金纳米线用于等离子体增强选择性光催化氧化苯甲醇


双金属 AuPd 等离子体光催化剂是催化芳香醇选择性氧化的有前途的候选者。然而，开发一种简单的一步法来制备具有优异光催化性能的独立 AuPd 纳米结构仍然是一个巨大的挑战。在这里，利用一种简便的液-液界面路线在温和条件下一锅法制备独立式 AuPd 合金纳米线 (NW)。具体来说，Au1Pd1 纳米线是通过氯仿-水界面上的定向附着在 40°C 下以 Na2PdCl4 和 HAuCl4 作为前体以及 1-萘酚作为还原剂生长的。 Au1Pd1纳米线具有直径细（4.0 nm）、长径比大、缺陷丰富、Au-Pd电子相互作用强等优点。在苯甲醇氧化成苯甲醛的过程中，Au1Pd1 NWs表现出优异的光催化活性和耐久性。在可见光照射40分钟时，苯甲醇转化率为98%，苯甲醛选择性为100%。经过五个循环后，Au1Pd1 NWs 仍然保持较高的光催化活性。与纯 Au 纳米线相比，Au1Pd1 纳米线中的 Pd 与 Au 合金化显着增强了光催化活性。结果表明，光照下产生的丰富的·O2-对于显着促进苯甲醇氧化成苯甲醛具有重要作用。