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Insight towards Nucleation Mechanism and Change in Morphology for Nanostructured Platinum Thin Film Directly Grown on Carbon Substrate via Electrochemical Deposition
Authors:Prabhakaran Dhanasekaran  Swaminathan Rajavarman  Sivasuriyanarayanan Vinod Selvaganesh  Santoshkumar Dattatray Bhat
Affiliation:1.CSIR-Central Electrochemical Research Institute (CECRI), CSIR-Madras Complex, Tamil Nadu 600113, India;2.Centre for Nanoscience and Nanotechnology, University of Madras, Tamil Nadu 600085, India;3.Indian Institute of Technology, Madras, Chennai, Tamil Nadu 600036, India;
Abstract:Nanocrystalline platinum with different morphologies is synthesized via electrochemical deposition technique. The nucleation mechanism and its structural effect over the electrodeposited Pt on carbon electrodes have been systematically studied. Powder X-ray diffraction, X-ray photoelectron spectroscopy, and field-emission scanning electron microscopy are employed to study nucleation, oxidation states, and Pt structure growth on a carbon electrode. This study reports significant development of Pt metal nanoparticles with different morphologies such as a sphere, flower, core-flower, and rod-like structure directly fabricated on carbon electrode while tuning the deposition parameters such as current density, time, temperature, pH during the deposition process. The proposed electrochemical route represents a superior fabrication procedure for large-scale electrode fabrication compared to a conventional method for preparing membrane electrode assemblies for fuel cell stacks.
Keywords:different morphology   electrochemical deposition   fuel cell   durability   PEFC
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