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Combinatorial screening of metallic glass electrocatalysts for the oxygen reduction reaction

Due to enormous challenges associated with theoretical modeling of multicomponent alloys, there are no reliable theoretical predictions available for their composition-dependent properties and structures. Taylor and Schroers have proposed to use combinatorial materials science to address this challenge, allowing for the rapid experimental screening of a large number of compositionally varying samples for desirable properties, coupling synthesis to high-throughput characterization.

For the important oxygen reduction reaction, they studied the performance of combinatorial Pd-Au-Ag-Ti thin film alloys using high-throughput measurements and correlated the electrochemical behavior to crystallographic properties. The parabolic correlation between strain and electrical overpotential describes a fine control over the strain induced in an alloy, which in turn affects the electrochemical catalytic activity; this control is realized through the combinatorial alloying approach.

J. Li, et al., Journal of Materials Chemistry A 5, 67, 2017