Optimisation of experimental conditions for pulse electrodeposition of nanostructured platinum

作者：Vatan H Nasiri^*; Shafiee M Mohammad; Khanfekr A; Laleh M; Kaffashan H; Jafarzadeh K

来源：Surface Engineering, 2014, 30(2): 89-96.

DOI：10.1179/1743294413Y.0000000228

• Nanostructured
• Platinum
• Electrodeposition
• Cyclic voltammetry
• Active surface area

Square wave cathodic current modulation was used to electrodeposit nanostructured platinum on niobium. The crystallite size, surface morphology and active surface area of deposits were strongly dependent on the process parameters such as pulse duty cycle, peak current density and pulse frequency. Microstructure, surface morphology and grain size of the deposits were studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Cyclic voltammetry was also used to determine the deposit's effective surface area. The best quality platinum coated electrode was obtained from the pulse plating condition of 15 Hz frequency, 9 mA cm(-2) peak current density and 30% duty cycle. Moreover, AFM observations demonstrated that the best quality Pt/Nb electrode has the highest active surface area f(r) of 281 cm(2) with the finest grain size of 52 nm. This means that the structure of the coating can be controlled by the electrodeposition parameters resulting in an increased electrochemical surface area.

• 出版日期2014-2