Chemical and electrochemical depositions of platinum group metals and their applications

This paper reviews the chemical and electrochemical depositions of platinum group metals (PGMs) from aqueous solutions. With a brief introduction on the fundamental aspects of chemical/electrochemical depositions, the review describes recent advances in chemical and Abbreviations: CD, cathode current density expressed as amperes per cm2; CE, cathode current efficiency; dc, direct current; DMFC, direct methanol fuel cell; DNS, dinitrosulfatoplatinate; Electroforming, deposition of thick metallic coating which is later removed from cathode substrate, used for preparing thick metallic foils, halograms, duplicating complicated structures etc.; NHE, normal hydrogen electrode; PCB, printed circuit board; PGM, platinum group metal; PEMFC, polymer electrolyte membrane fuel cell; PET, polyethylene terphthalate; Pt-P-salt, cis-diammineplatinum(II)nitrite; PWB, printed wiring board; Strike, very thin metallic coating that is given prior to the main PGM coating for changing the character of base metal; SCE, saturated calomel electrode ∗ Corresponding author. Tel.: +91 4565 227550; fax: +91 4565 227779/227713. E-mail address: trivedi [email protected] (D.C. Trivedi). 0010-8545/$ – see front matter © 2004 Elsevier B.V. All rights reserved. doi:10.1016/j.ccr.2004.08.015 614 C.R.K. Rao, D.C. Trivedi / Coordination Chemistry Reviews 249 (2005) 613–631 electrochemical deposition technologies. It discusses the properties and applications of the deposits. The review also discusses the applications and recent progress of PGMs as fuel cell catalysts. © 2004 Elsevier B.V. All rights reserved.