Surprisingly strong effect of stabilizer on the properties of Au nanoparticles and Pt^Au nanostructures in electrocatalysis.
Surprisingly strong effect of stabilizer on the properties of Au nanoparticles and Pt^Au nanostructures in electrocatalysis.
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DOI：
10.1039/c0nr00295j
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发表时间：
2010-12
期刊：
影响因子：
6.7
通讯作者：
Guirong Zhang;Bo-Qing Xu
中科院分区：
文献类型：
--
作者：
Guirong Zhang;Bo-Qing Xu
我们发现，几乎单分散的Au纳米粒子（NPs）及其衍生的Pt-on-Au（Pt^Au）纳米结构与类似分散的Pt实体的电催化性能取决于参与的Au粒子的胶体合成的稳定剂的性质。稳定剂对Au NPs的氧还原反应（ORR）活性的影响显著超过了Au纳米尺寸效应，因此对早期研究中报道的携带各种稳定剂的金属NPs的尺寸依赖性提出了警告。研究还表明，稳定剂对Au纳米粒子性能的影响可以进一步引起其负载Pt的催化性能的变化。这些发现清楚地表明，在金属纳米颗粒的胶体合成中适当筛选稳定剂对于创新的纳米材料和催化剂将是重要的。
We show that the electrocatalytic properties of nearly monodispersed Au nanoparticles (NPs) and their derived Pt-on-Au (Pt^Au) nanostructures with similarly dispersed Pt entities are dependent on the nature of stabilizers involved in the colloidal syntheses of the Au particles. The effect of stabilizer on the activity for oxygen reduction reaction (ORR) of Au NPs significantly outweighed the Au nano-size effect and thus would raise an alert to those reported size-dependent properties of metal NPs carrying various stabilizers in earlier studies. It is also demonstrated that the stabilizer effect on the property of Au NPs can further induce changes in the catalytic properties of their carried Pt. These findings clearly suggest that a proper screening of the stabilizer in the colloidal synthesis of metal NPs would be important for innovative nanomaterials and catalysts.