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

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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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Litherland, A. G. M., Spurway, L. M., Gordeev, S. N., Aaronson, B. D. B., Wain, A. J., O’Connell, M. A., … Marken, F. (2018). Galvanic exchange platinization reveals laser-inscribed pattern in 3D-LAM-printed steel. Journal of Solid State Electrochemistry, 22(6), 1755–1762. https://doi.org/10.1007/s10008-017-3869-8

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