Abstract Two-dimensional gold nanostructures with controlled edge length and thickness were synthesized into polygonal shapes categorized as smooth/jagged-edged and single/multiple-layered nanosheets. Despite their micrometer-scaled lateral dimension, the high catalytic activity of the 2D Au nanostructures was observed in the reduction reaction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4. We studied the dependability of the catalytic performance on the edge area by examining the relationship between rate constants and catalytically active area of single-layered, jagged-edged, and multiply stacked 2D Au nanostructures. Furthermore, we successfully fabricated a robust and reusable catalyst by incorporating 2D Au nanostructures in a cellulose paper as a flexible substrate through the monolayer assembly and transfer method. The comparative study shows that multiply stacked Au nanosheets on a paper substrate outperformed the other Au nanostructures including nanoparticle.

中文翻译：

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二维载金纤维素纸还原4-硝基苯酚的可回收催化剂

摘要 将边长和厚度可控的二维金纳米结构合成为多边形形状，分为光滑/锯齿边和单层/多层纳米片。尽管它们的横向尺寸为微米级，但在 NaBH4 存在下，在 4-硝基苯酚还原为 4-氨基苯酚的反应中观察到 2D Au 纳米结构的高催化活性。我们通过检查速率常数与单层、锯齿状边缘和多层叠 2D Au 纳米结构的催化活性面积之间的关系，研究了边缘区域催化性能的可靠性。此外，我们通过单层组装和转移方法将二维金纳米结构结合到纤维素纸中作为柔性基材，成功地制造了一种坚固且可重复使用的催化剂。