Shape-controlled syntheses of rhodium nanocrystals for the enhancement of their catalytic properties  

作　　者：Shuifen Xie Xiang Yang Liu Younan Xia 

机构地区：[1]Research Institute for Soft Matter and Biomimetics and Department of Physics, Xiamen University, Xiamen, Fujian 361005, China [2]The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, and School of Chemistry and Biochemistry and School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States

出　　处：《Nano Research》2015年第1期82-96,共15页纳米研究（英文版）

摘　　要：Rhodium （Rh） is a critical component of many catalysts for a variety of chemical transformation processes. Controlling the shape of Rh nanocrystals offers an effective route to the optimization of their catalytic performance owing to a close correlation between the catalytic activity/selectivity and the surface atomic structure. It also helps to substantially reduce the loading amount and thus achieve a sustainable use of this scarce and precious metal. In this review article, we focus on recent progress in the shape-controlled synthesis of Rh nanocrystals with the goal of enhandng their catalytic properties. Both traditional and newly- developed synthetic strategies and growth mechanisms will be discussed, including those based on the use of surface capping agents, manipulation of reduction kinetics, control of surface diffusion rate, management of oxidation etching, and electrochemical alteration. We also use two examples to highlight the unique opportunities offered by shape-controlled synthesis for enhancing the use of this metal in catalytic applications. The strategies can also be extended to other precious metals in an effort to advance the production of cost-effective catalysts.金老(Rh ) 是为许多化学转变过程的许多催化剂的一个批评部件。控制 Rh nanocrystals 的形状由于在催化活动 / 选择和表面之间的靠近的关联把一条有效线路提供给他们的催化表演的优化原子结构。它也帮助实质地减少装载数量并且因此完成这少见、宝贵的金属的持续使用。在这篇评论文章，我们旨在提高他们的催化性质在 Rh nanocrystals 的控制形状的合成集中于最近的进步。传统、最新开发的合成策略和生长机制将基于盖住代理人，减小动力学的操作，表面散开率的控制，蚀刻的氧化的管理，和电气化学的改变的表面的使用被讨论，包括那些。我们也使用二个例子加亮控制形状的合成为在催化应用提高这金属的使用提供的唯一的机会。策略能也被扩大到另外的宝贵金属以推进划算的催化剂的生产。

关 键 词：Rhodium nanocrystals shape control material synthesis surface structure CATALYSIS 

分 类 号：O643.36[理学—物理化学] TQ133.1[理学—化学]