Mixed-Metal Pt Monolayer Electrocatalysts for Enhanced Oxygen Reduction Kinetics

摘要

Our studies open a new way of synthesizing improved ORR catalysts through the modification and control of the surface reactivity of Pt-based mixed monolayers supported on transition metals other than Pt. Besides their decreased Pt-loading, this new class of catalysts can be tailored to show significantly enhanced ORR kinetics, and at the same time possess increased stability of Pt under typical fuel cell operating conditions. Furthermore, our studies demonstrate that less costly and, at the same time, significantly improved ORR electrocatalysts can be designed by developing a fundamental understanding of their atomic-scale phenomena, using a combination of state-of-the-art experimental techniques and modern computational chemistry methods.