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首页> 外文期刊>Electroanalysis >Electrochemical deposition of gold metal particles into 3-dimensional polypyrrole film deposited on a highly oriented pyrolytic graphite
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Electrochemical deposition of gold metal particles into 3-dimensional polypyrrole film deposited on a highly oriented pyrolytic graphite

机译：将金金属颗粒电化学沉积到高定向热解石墨上沉积的3维聚吡咯膜中

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摘要

Electrochemical techniques and lateral friction microscopy (LFM) are exploited to characterize the deposition of gold metal particles onto the 3-dimensional (3-D) polypyrrole (PPy) film deposited on 2-dimensional (2-D) highly oriented pyrolytic graphite (HOPG) substrate surface in an aqueous solution involving 0.01 M pyrrole and 0.1 M LiClO4 . 3H(2)O. Cyclic voltammetry is utilized to find the gold deposition potential onto the PPy film from 0.001 M KAu(CN)(2)/ KOH solution. The gold deposition potential is found to be in the range of - 1.2 V to - 1.4 V. Chronoamperometry is used to find out the nucleation and growth mechanism of gold metal particles onto PPy film. When the PPy film is thin, the mechanism follows the 3-D instantaneous and moved towards 3-D progressive as the film thickness increases. Considering the high resistance of thick PPy film and insulating and compact nature of the film at more cathodic potentials, it is suggested that the gold nuclei are formed first on the HOPG substrate surface, move to the PPy film surface and then distributed inside the PPy matrix. Since the friction of gold and the PPy film is different, the LFM is found to be an effective tool to see the distribution of gold particles in the domain boundaries of the PPy film. [References: 33]
机译：利用电化学技术和横向摩擦显微镜（LFM）来表征金金属颗粒在二维（2-D）高取向热解石墨（HOPG）上沉积的三维（3-D）聚吡咯（PPy）膜上的沉积）包含0.01 M吡咯和0.1 M LiClO4的水溶液中的基质表面。 3H（2）O。利用循环伏安法从0.001 M KAu（CN）（2）/ KOH溶液中发现金在PPy膜上的沉积潜力。发现金的沉积电势在-1.2 V至-1.4 V的范围内。使用计时安培法确定金金属颗粒在PPy膜上的形核和生长机理。当PPy薄膜很薄时，该机制会瞬时跟随3-D并随着薄膜厚度的增加而朝着3-D方向移动。考虑到厚PPy膜的高电阻以及在更高的阴极电势下膜的绝缘性和致密性，建议先在HOPG衬底表面上形成金核，然后移动到PPy膜表面，然后再在PPy基质内部分布。由于金与PPy膜的摩擦力不同，因此发现LFM是查看金颗粒在PPy膜域边界中分布的有效工具。 [参考：33]

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