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催化金纳米颗粒的大小依赖的电泳沉积

Rafael A Masitas¹, Stacy L Allen², Francis P Zamborini²

¹Department of Chemistry & Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States.

Journal of the American Chemical Society

|November 3, 2016

概括

电泳沉积 (EPD) 根据大小选择性地沉积金纳米粒子 (AuNP). 过氧化 (H2O2) 对于这种选择性沉积在电极上至关重要.

科学领域:

材料科学
电化学
纳米技术

背景情况:

黄金纳米粒子 (AuNP) 在各种应用中广泛使用.
控制纳米颗粒沉积对于设备制造至关重要.
电泳沉积 (EPD) 是一种沉积带电粒子的技术.

研究的目的:

为了研究酸盐稳定 Au NPs 的尺寸依赖性电泳沉积 (EPD).
了解过氧化 (H2O2) 在EPD过程中的作用.
确定沉积潜力和时间对Au NP覆盖面和规模的影响.

主要方法:

在玻璃/氧化物 (ITO) 电极上使用尺寸依赖的 Au NPs EPD.
使用线性扫描剥离电压测量 (LSSV) 和扫描电子显微镜 (SEM) 的分析.
在两电极和三电极配置中进行的电化学实验.

主要成果:

EPD具有尺寸选择性,较小的Au NP需要较低的沉积潜力.
沉积取决于H2O2的存在,这促进了酸盐稳定剂的中和.
Au NP沉积速度受沉积时间和H2O2度的影响.

结论:

NP对H2O2氧化的催化活性是大小选择性沉积的主要驱动因素.
EPD提供了一种可控制的方法,用于在导电基板上沉积特定尺寸的Au NP.
这项研究为纳米技术应用优化Au NP沉积提供了见解.

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