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Galvanic exchange platinization reveals laser-inscribed pattern in 3D-LAM-printed steel

Litherland, Alex G. M.; Spurway, Lee M.; Gordeev, Sergey N.; Aaronson, Barak D. B.; Wain, A; O’Connell, M A; Piili, H; Hovilehto, M; Matilainen, V-P; Vuorema, A; Marken, F (2018) Galvanic exchange platinization reveals laser-inscribed pattern in 3D-LAM-printed steel. Journal of Solid State Electrochemistry, 22 (6). pp. 1755-1762. ISSN 1432-8488

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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.

Item Type: Article
Subjects: Advanced Materials > Electrochemistry
Divisions: Engineering, Materials & Electrical Science
Identification number/DOI: 10.1007/s10008-017-3869-8
Last Modified: 19 Jul 2018 10:40
URI: http://eprintspublications.npl.co.uk/id/eprint/8039

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