化学工程
电化学
氧化锡
制作
电解质
沉积(地质)
阳极
作者
Siyuan Li,Haiyan Chen,Jie Liu,Yida Deng,Xiaopeng Han,Wenbin Hu,Cheng Zhong
标识
DOI:10.1021/acsami.7b08604
摘要
Pulse potential electrodeposition was successfully utilized to electrochemically fabricate platinum (Pt) nanoparticles on indium tin oxide (ITO) conductive glass substrates for catalysis toward ammonia electro-oxidation. The effect of deposition parameters (lower potential El, lower potential duration tl, and upper potential duration tu) on the size and number density of Pt nanoparticles was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrocatalytic activity of the Pt nanoparticle/ITO electrode for ammonia oxidation was characterized by the cyclic voltammetry (CV) method. The results showed that lower El and longer tl accelerate the formation of Pt nuclei while longer tu favors the growth of grain size to some extent, as El mainly tunes electrochemical overpotential while tl and tu affect the activation and mass transfer process. By the tuning of the deposition parameters, Pt nanoparticle/ITO electrodes with a polycrystalline nature and 5 nm-scale p...
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