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首页> 外文期刊>RSC Advances >Terpyridine-based Pd(ii)/Ni(ii) organometallic framework nano-sheets supported on graphene oxide—investigating the fabrication, tuning of catalytic properties and synergetic effects
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Terpyridine-based Pd(ii)/Ni(ii) organometallic framework nano-sheets supported on graphene oxide—investigating the fabrication, tuning of catalytic properties and synergetic effects

机译：基于Terpyridine的Pd（II）/ Ni（II）有机金属框架纳米片，其支持石墨烯氧化物研究制造，调整催化性能和协同作用

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Tailoring the structures of catalysts and the arrangement of organic bimetallic catalysts are essential in both fundamental research and applications. However, they still impose enormous challenges such as size and active species distribution, ordered uniformity, and controllable composition, which are critical in determining their specific activities and efficiency. Herein, a novel terpyridine-based hetero-bimetallic Ni/Pd nanosheet supported on graphene oxide (denoted as GO@Tpy-Ni/Pd ) was fabricated, which exhibited higher catalytic activity, substrate applicability and recyclability for the Suzuki coupling reaction under mild conditions. The catalytic mechanism was heterogeneous catalysis at the interface and the synergetic effect between Pd and Ni resulted in a little Ni(0)/Pd(0) cluster including Pd( II )/Ni( II ) as a whole being formed through electron transfer on the catalytic surface. This phenomenon could be interpreted as the nanoscale clusters of Ni/Pd being the real active centre stabilized by the ligand and GO and the synergetic effect. The absorption and desorption of different substrates and products on Ni/Pd clusters, as calculated by DFT, was proved to be another key factor.
机译：剪裁催化剂的结构和有机双金属催化剂的布置对于基本研究和应用是必不可少的。然而，它们仍然造成巨大的挑战，例如尺寸和活性物种分布，有序的均匀性和可控组合物，这对于确定其特定活动和效率至关重要。在此，制备了在石墨烯氧化物（表示为GO @ TPy-Ni / Pd）上负载的新型噻吩基的杂生二金属Ni / Pd纳米片，其在温和条件下表现出较高的催化活性，基质适用性和用于铃木偶联反应的可回收性。催化机制在界面中是异质的催化，并且Pd和Ni之间的协同效果导致少量Ni（0）/ pd（0）簇，包括通过电子转移形成的Pd（II）/ Ni（II）。催化表面。这种现象可以被解释为Ni / Pd的纳米级簇是由配体稳定的真正活跃的中心并进行协同作用。被证明是DFT计算的Ni / Pd簇上不同底物和产物的吸收和解吸，被证明是另一个关键因素。

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