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Journal Article

Electrochemical dealloying in a magnetic field-Tapping the potential for catalyst and material design

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Tschulik,  Kristina
Ruhr University Bochum, Faculty for Chemistry and Biochemistry, Analytical Chemistry II, Bochum, Germany;
Electrochemistry and Nanoscale Materials, Max Planck Fellow Group, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Rurainsky, C., Nettler, D.-.-R., Pahl, T., Just, A., Cignoni, P., Kanokkanchana, K., et al. (2022). Electrochemical dealloying in a magnetic field-Tapping the potential for catalyst and material design. Electrochimica Acta, 426: 140807. doi:10.1016/j.electacta.2022.140807.


Cite as: https://hdl.handle.net/21.11116/0000-000F-5A12-8
Abstract
Nanocatalyst optimisation through electrochemical dealloying has been employed as a successful strategy to increase catalytic activity, while reducing the need for precious metals. We present here a new pathway to in-fluence the electrochemical dealloying, through external homogeneous magnetic fields. A homogeneous mag-netic field with a flux density of 450 mT in two orientations, parallel or perpendicular to the current direction, was used during electrochemical dealloying using cyclic voltammetry of AgAu nanoparticles. We found increased porosity for low dealloying cycle numbers and improved catalytic properties after longer cycling, compared to nanoparticles dealloyed in the absence of magnetic fields. These findings demonstrate that magnetic fields applied during electrochemical dealloying have currently untapped potential that can be used to influence material properties in a new way and give researchers another powerful tool for material design.