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

• Published in: Nano research 2015-01, Vol.8 (1), p.82-96
• Main Authors: Xie, Shuifen, Liu, Xiang Yang, Xia, Younan
• Format: Article
• Language: English
• Subjects: Atomic/Molecular Structure and Spectra; Biomedicine; Biotechnology; Catalysis; Catalysts; Chemistry and Materials Science; Condensed Matter Physics; Control surfaces; Electrochemistry; Materials Science; Nanocrystals; Nanostructure; Nanotechnology; Precious metals; Review Article; Rhodium; Strategy; Sustainable use; Synthesis; 催化性能; 可持续利用; 形状; 控制合成; 纳米晶体; 表面原子结构; 还原动力学; 铑
• ISSN: 1998-0124; 1998-0000
• DOI: 10.1007/s12274-014-0674-x

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.