Abstract
Galvanic exchange involving dissolution of iron and the simultaneous growth of platinum onto 316 L stainless steel was investigated for specimens manufactured by 3D-printing, and the behavior was compared to conventional stainless steel. Novel phenomena associated with the 3D-printed steel, but not conventional steel, reacting in three distinct phases were observed: first, with low platinum loading, a bright etching pattern linked to the laser-manufacturing process is revealed at the steel surface; second, a nanostructured pore pattern with platinum nano-deposits forms; and third, a darker platinum film coating of typically 500-nm thickness forms and then peels off the steel surface with further platinum growth underneath. Unlike the conventional steel (and mainly due to residual porosity), 3D-printed steel supports well-adhered platinum films for potential application in electrocatalysis, as demonstrated for alkaline methanol oxidation. [Figure not available: see fulltext.]
Original language | English |
---|---|
Pages (from-to) | 1-8 |
Number of pages | 8 |
Journal | Journal of Solid State Electrochemistry |
Volume | 22 |
Issue number | 6 |
Early online date | 13 Jan 2018 |
DOIs | |
Publication status | Published - 1 Jun 2018 |
Keywords
- Alloys
- Catalysis
- Electroless deposition
- Laser pattern
- Nanoporosity
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Electrochemistry
- Electrical and Electronic Engineering