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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >One-step green synthesis of composition-tunable Pt-Cu alloy nanowire networks with high catalytic activity for 4-nitrophenol reduction
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One-step green synthesis of composition-tunable Pt-Cu alloy nanowire networks with high catalytic activity for 4-nitrophenol reduction

机译：具有高催化活性的组合可调PT-Cu合金纳米线网络的一步绿色合成，4-硝基苯酚还原

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Controlling the structure, morphology, and composition of noble metals is of great significance to improve the catalytic activity and stability of catalysts. Herein, we have successfully synthesized self-interconnecting Pt-Cu alloy nanowire networks (NWNs) with controllable compositions via the co-reduction of the metal precursors potassium chloroplatinate (K2PtCl6) and CuCl2 with sodium borohydride (NaBH4). Owing to the hydrogen bubbles formed by NaBH4 hydrolysis and oxidation as a dynamic template, the facile strategy was carried out without any organic solvent, capping agent, polymer, or special experimental device, ensuring that the surfaces of NWNs were definitely clean. The performance of the as-prepared Pt-Cu alloy NWNs for the reduction of 4-NP was dramatically improved compared with that of pure Pt NWNs and the commercial Pt/C catalyst. Particularly, the PtCu NWNs with a Pt/Cu atomic ratio of 1:1 exhibited excellent catalytic activity and reusability for the reduction of toxic 4-NP. The reaction rate constant and activity factor of the PtCu NWNs reached 1.339 x 10(-2) s(-1) and 66.95 s(-1) g(-1), respectively, which were dramatically better than those of pure Pt NWNs (11.5-fold) and commercial Pt/C (13-fold). The superior catalytic activity and reusability can mainly be attributed to the clean surface, the synergistic effect of Cu and Pt atoms and the self-interconnecting nanowire network structure.
机译：控制贵金属的结构，形态和组成具有重要意义，以改善催化剂的催化活性和稳定性。在此，我们已经成功地合成了通过与硼氢化钠（NABH4）的金属前体氯铂（K2PTCL6）和CuCl2的共减化的可控组合物的自互链式的PT-Cu合金纳米线网络（NWNS）。由于由NaBH 4水解和氧化作为动态模板形成的氢气，因此在没有任何有机溶剂，封端剂，聚合物或特殊实验装置的情况下进行的容易策略，确保NWNS的表面肯定是干净的。与纯PT NWNS和商业Pt / C催化剂的催化剂相比，如制备的Pt-Cu合金NWNS的性能显着提高了4-NP。特别地，具有Pt / Cu原子比为1：1的PTCU NWNS表现出优异的催化活性和可重用性，用于减少毒性4-NP。 PTCU NWNS的反应速率恒定和活度因子分别达到1.339×10（-2）和66.95秒（-1）g（-1）g（-1），这显着优于纯Pt nwns（ 11.5倍）和商业PT / C（13倍）。优异的催化活性和可重用性主要归因于清洁表面，Cu和Pt原子的协同效应以及自互连的纳米线网络结构。

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