Shape-Controlled Synthesis of Platinum-Based Nanocrystals and Their Electrocatalytic Applications in Fuel Cells

To achieve environmentally benign energy conversion with the carbon neutrality target via electrochemical reactions, the innovation of electrocatalysts plays a vital role in the enablement of renewable resources. Nowadays, Pt-based nanocrystals(NCs) have been identified as one class of the most promising candidates to efficiently catalyze both the half-reactions in hydrogen-and hydrocarbonbased fuel cells. Here, we thoroughly discuss the key achievement in developing shape-controlled Pt and Pt-based NCs, and their electrochemical applications in fuel cells. We begin with a mechanistic discussion on how the morphology can be precisely controlled in a colloidal system, followed by highlighting the advanced development of shape-controlled Pt, Pt-alloy, Pt-based core@shell NCs, Pt-based nanocages, and Pt-based intermetallic compounds. We then select some case studies on models of typical reactions(oxygen reduction reaction at the cathode and small molecular oxidation reaction at the anode) that are enhanced by the shape-controlled Pt-based nanocatalysts. Finally, we provide an outlook on the potential challenges of shape-controlled nanocatalysts and envision their perspective with suggestions.

Understanding the forces acting in self-assembly and the implications for constructing three-dimensional （3D） supercrystals

进称为 supercrystals 或上层建筑的订的结构的 nanocrystals 的集会由于象相关那样的众多的有用应用成为了枢轴的边疆在宏观的晶体的原子的安排并且调节集体性质遇见各种各样的应用的要求。在这篇文章，在 nanocrystals 的三维的超点阵的准备的最近的进步被构画出，与在有序的汇编以外的驱动力和进化线路上的一个特别重音。首先，带或内部并且外部地管理三维的 supercrystals 的形成的斥力系统地在三维的组织工会关于他们的起源和功能被识别并且讨论。然后，基于象微滴蒸发和一个液体 / 液体接口那样的生长情形自己组装的 nanocrystal 的通常应用的工具的摘要的介绍与特定的盒子被介绍并且详细说明了分析。最后，为这块地的存在挑战和前景简短被加亮。