Cu(2+)辅助合成具有高指数晶面的六八面体 Au-Pd 合金纳米晶体。
Cu(2+)-assisted synthesis of hexoctahedral Au-Pd alloy nanocrystals with high-index facets.
机构信息
State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
出版信息
J Am Chem Soc. 2011 Nov 2;133(43):17114-7. doi: 10.1021/ja2063617. Epub 2011 Oct 6.
Controlled syntheses of multicomponent metal nanocrystals (NCs) and high-index surfaces have attracted increasing attention due to the specific physical and chemical properties of such NCs. Taking advantage of copper underpotential deposition as a bridge, hexoctahedral Au-Pd alloy NCs with {hkl} facets exposed were successfully synthesized, while phase separation occurred in the absence of Cu(2+) ions. The as-prepared hexoctahedral Au-Pd alloy NCs exhibited very excellent performance in terms of both formic acid electro-oxidation and methanol tolerance due to synergism between the high-index facets and the alloy.
由于此类 NCs 的特殊物理和化学性质，多组分金属纳米晶体 (NCs) 和高指数表面的可控合成受到了越来越多的关注。利用铜欠电位沉积作为桥梁，成功合成了具有暴露的 {hkl} 面的六八面体 Au-Pd 合金 NCs，而在没有 Cu(2+) 离子的情况下则发生了相分离。由于高指数面和合金之间的协同作用，所制备的六八面体 Au-Pd 合金 NCs 在甲酸电氧化和甲醇耐受性方面表现出非常优异的性能。
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