High throughput optimisation of PdCu alloy electrocatalysts for the reduction of nitrate ions.

Highlights: [•] A high-throughput methodology is used to synthesise and screen PdCu alloys. [•] The expected equilibrium phases of the PdCu alloys were identified using XRD. [•] Pd in Cu results in reversible surface oxidation of Cu and oxide destabilisation. [•] This is a result of bi-functional and electronic effects of Pd in Cu, respectively. [•] The most active catalyst is in a narrow compositional region around 84%at. Cu. [ABSTRACT FROM AUTHOR]