Nickel-coated 3D-printed titanium electrodes for electrochemical flow reactors

Arenas L.F. Miranda-Alcántara B. Kaishubayeva N. Abahussain A.A.M. Rivera F.F. Ponce de León C. Walsh F.C.
2023 Taylor and Francis Ltd.

Transactions of the Institute of Metal Finishing
2023 #101 Issue 3 119 - 125 pp.

Electrocatalyst-coated metallic electrodes for electrochemical flow reactors have many applications in electrosynthesis, environmental remediation and energy conversion. This work presents novel nickel-coated titanium-alloy electrodes produced by means of direct metal laser sintering and constant current electrodeposition in an additive-free Wood’s nickel strike then a Watts nickel bath. Several 3D porous architectures were created in Ti-6Al-4 V alloy and coated, their digital design being the subject of previous work. Nickel coatings were macroscopically uniform and adherent with a thickness up to 5.8 µm, depending on the surface area of the electrodes. The morphology of nickel was cauliflower-like, with crystallisation growth occurring as spherical grains, as typically found for deposits from pH buffered Watts baths. Some degree of coating porosity was observed at electrodes of large surface area, indicating the need for longer deposition times. The results open the path for further optimisation of electrodeposition parameters and the development of bath additives to tailor deposit properties.

Additive manufacturing , designed structure electrode , electrocatalytic coating , electrosynthesis , flow cell , periodic cellular material , porous electrode , three-dimensional electrode

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Electrochemical Engineering Laboratory, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, United Kingdom
Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Parque Tecnológico Querétaro, Sanfandila, Querétaro, Mexico
Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia
Clausthal University of Technology, Institute of Chemical and Electrochemical Process Engineering, Research Centre for Energy Storage Technologies, Am Stollen 19A, Goslar, 38640, Germany
Rauza-PV, LLP., Astana, Kazakhstan

Electrochemical Engineering Laboratory
Centro de Investigación y Desarrollo Tecnológico en Electroquímica
Department of Chemical Engineering
Clausthal University of Technology
Rauza-PV

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