Galvanic exchange platinization reveals laser-inscribed pattern in 3D-LAM-printed steel |
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| Authors: | Alex G. M. Litherland Lee M. Spurway Sergey N. Gordeev Barak D. B. Aaronson Andrew J. Wain Michael A. O’Connell Heidi Piili Mikko Hovilehto Ville-Pekka Matilainen Anne Vuorema Frank Marken |
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| Affiliation: | 1.Department of Physics,University of Bath,Bath,UK;2.Department of Chemistry,University of Bath,Bath,UK;3.National Physical Laboratory,Teddington,UK;4.Laser Processing Research Group,Lappeenranta University of Technology,Lappeenranta,Finland;5.LUT RE-SOURCE Research Platform,Lappeenranta University of Technology,Lappeenranta,Finland |
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| 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. |
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