Hong Jong Wook, Kim Yena, Kwon Yongmin, Han Sang Woo
Center for Nanotectonics, Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, Korea.
Department of Chemistry, University of Ulsan, Ulsan, 44610, Korea.
Chem Asian J. 2016 Aug 19;11(16):2224-39. doi: 10.1002/asia.201600462. Epub 2016 Jul 6.
Noble-metal nanocrystals (NCs) show excellent catalytic performance for many important electrocatalysis reactions. The crystallographic properties of the facets by which the NCs are bound, closely associated with the shape of the NCs, have a profound influence on the electrocatalytic function of the NCs. To develop an efficient strategy for the synthesis of NCs with controlled facets as well as compositions, understanding of the growth mechanism of the NCs and their interaction with the chemical species involved in NC synthesis is quite important. Furthermore, understanding the facet-dependent catalytic properties of noble-metal NCs and the corresponding mechanisms for various electrocatalysis reactions will allow for the rational design of robust electrocatalysts. In this review, we summarize recently developed synthesis strategies for the preparation of mono- and bimetallic noble-metal NCs by classifying them by the type of facets through which they are enclosed and discuss the electrocatalytic applications of noble-metal NCs with controlled facets, especially for reactions associated with fuel-cell applications, such as the oxygen reduction reaction and fuel (methanol, ethanol, and formic acid) oxidation reactions.
贵金属纳米晶体（NCs）在许多重要的电催化反应中表现出优异的催化性能。NCs所具有的晶面的晶体学性质与NCs的形状密切相关，对NCs的电催化功能有深远影响。为了开发一种合成具有可控晶面和组成的NCs的有效策略，了解NCs的生长机制及其与NC合成中涉及的化学物种的相互作用非常重要。此外，了解贵金属NCs的晶面依赖性催化性质以及各种电催化反应的相应机制将有助于合理设计坚固的电催化剂。在本综述中，我们通过按其包围的晶面类型对最近开发的用于制备单金属和双金属贵金属NCs的合成策略进行分类总结，并讨论具有可控晶面的贵金属NCs的电催化应用，特别是与燃料电池应用相关的反应，如氧还原反应和燃料（甲醇、乙醇和甲酸）氧化反应。
