Electrodeposition of platinum on 3D-printed titanium mesh to produce tailored, high area anodes. (2nd January 2020)

• Record Type: Journal Article
• Authors: Arenas, L. F.; Kaishubayeva, N.; Ponce de León, C.; Walsh, F. C.
• Is Part Of: Transactions of the Institute of Metal Finishing. Volume 98:Number 1(2020)
• Page Start: 48
• Page End: 52
• Publication Date: 2020-01-02
• Subjects: Additive manufacturing -- electroplating -- mesh -- metal foam -- porous electrode -- platinum -- platinised titanium -- three-dimensional electrode; Metals -- Finishing -- Periodicals; Metals -- Surfaces -- Periodicals; Metallurgy -- Periodicals; 671.705
• DOI: 10.1080/00202967.2020.1698158
• Languages: English
• ISSNs: 0020-2967

Abstract

ABSTRACT: The versatility and convenience of 3D printing can be used to produce tailored metal mesh electrodes, which offer a high volumetric area and good gas release properties for applications in electrochemical technology. In this work, a titanium mesh with 20 ppi triangular pores was designed and then manufactured by 3D printing. A thin coating of platinum with strong adhesion was then applied by electrodeposition in a solution of hexachloroplatinic acid in HCl at 90°C. For this, a current of 0.1 A, corresponding to a current density of 0.92 mA cm −2 was applied for 60 min to the work piece, which was previously etched in 10% (w/v) oxalic acid at 80°C. Compact, adherent and silver-grey platinum deposits, 0.16 µm average thickness and 0.33 mg cm −2 Pt loading were obtained. The product can be used as an inert anode in nickel plating baths and as a porous electrode in organic electrosynthesis or cerium-based flow batteries.