Magnetic-field-regulated electrocatalytic performance in cubic perovskite oxide.

Regulation of electrocatalysis by an external magnetic field has been recently reported, but the physical understanding of what triggers this effect remains elusive. Most cases occur in transition-metal oxychalcogenides with ferromagnetism/ferrimagnetism, but the research on perovskite oxide catalysts is still lacking. In this work, we synthesized a series of Eu element-substituted Ba0.5Sr0.5Co0.8Fe0.2O3 cubic perovskites, and importantly, the regulation of the electrochemical performance by the magnetic field was achieved in Eu0.3(Ba0.5Sr0.5)0.7Co0.8Fe0.2O3 at 273 K, regardless of the direction of the applied magnetic field. Our results promote the use of the magnetic field as an interesting playground to ameliorate electrocatalysis of perovskite oxides close to the paramagnetic state. [ABSTRACT FROM AUTHOR]