Electrochemical deposition of Pt nanoparticles on diamond substrates

✍ Scribed by Hu, Jingping ;Lu, Xiao ;Foord, John S. ;Wang, Qiang

• Book ID: 105365670
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 618 KB
• Volume: 206
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200982226

✦ Synopsis

Abstract

Platinum nanoparticles were deposited on polished smooth, as‐grown large grain and small grain diamond substrates by a potentiostatic method. The influence of deposition potential and the morphology of BDD substrates were studied. A progressive nucleation along with spherical clusters was observed on smooth BDD electrode, accompanied with a heterogeneous segregation of platinum on diamond facets of higher electrochemical activities and a weak binding to the substrate. In contrast, an instantaneous nucleation was observed on as‐grown small grain and large grain BDD electrodes, with a dendritic microstructure and a much larger specific active area. The platinum decorated as‐grown smaller grain BDD electrodes show a much better electrochemical stability than the other electrodes investigated.