材料科学
钯
纳米片
催化作用
纳米结构
纳米晶
纳米材料
晶体孪晶
化学工程
纳米技术
水溶液
复合材料
化学
微观结构
物理化学
有机化学
工程类
作者
Hojin Ahn,Hochan Ahn,Bon Seung Goo,Yongmin Kwon,Yonghyeon Kim,Dae Han Wi,Jong Wook Hong,Seunghoon Lee,Young Wook Lee,Sang Woo Han
出处
期刊:Small
[Wiley]
日期:2024-05-02
标识
DOI:10.1002/smll.202401230
摘要
Abstract Control over the morphology of nanomaterials to have a 2D structure and manipulating the surface strain of nanostructures through defect control have proved to be promising for developing efficient catalysts for sustainable chemical and energy conversion. Here a one‐pot aqueous synthesis route of freestanding Pd nanosheets with a penta‐twinned structure (Pd PT NSs) is presented. The generation of the penta‐twinned nanosheet structure can be succeeded by directing the anisotropic growth of Pd under the controlled reduction kinetics of Pd precursors. Experimental and computational investigations showed that the surface atoms of the Pd PT NSs are effectively under a compressive environment due to the strain imposed by their twin boundary defects. Due to the twin boundary‐induced surface strain as well as the 2D structure of the Pd PT NSs, they exhibited highly enhanced electrocatalytic activity for oxygen reduction reaction compared to Pd nanosheets without a twin boundary, 3D Pd nanocrystals, and commercial Pd/C and Pt/C catalysts.
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