Shape‐controlled synthesis of colloidal metal nanocrystals has traditionally relied on the use of an approach that involves the reduction of a metal precursor by a single reductant. Once the concentration of atoms surpasses supersaturation, they will undergo homogeneous nucleation to generate nuclei and then seeds, followed by further growth into nanocrystals. In general, it is a grand challenge to optimize such an approach because the kinetic requirement for nucleation tends to be drastically different from what is needed to guide the growth process. In this work, we overcome this difficulty by switching to a dual‐reductant approach, in which both strong and weak reductants are added into the same reaction solution. By controlling their amounts to program the reduction kinetics, the strong reductant only regulates the homogeneous nucleation process to generate the desired seeds, and once consumed, the weak reductant takes over to control the growth pattern and thereby the shape of the resulting nanocrystals.

中文翻译：

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一锅双还原法合成钯纳米级八面体及动力学分析

传统上，胶体金属纳米晶体的形状控制合成依赖于一种方法的使用，该方法涉及通过单一还原剂还原金属前体。一旦原子的浓度超过过饱和，它们将经历均相成核以生成核，然后产生晶种，然后进一步生长为纳米晶体。通常，优化这种方法是一个巨大的挑战，因为成核的动力学要求往往与指导生长过程所需要的完全不同。在这项工作中，我们通过切换到双重还原剂方法克服了这一困难，在双重还原剂方法中，强还原剂和弱还原剂都添加到了同一反应溶液中。通过控制其数量以编程还原动力学，