Role of Nanomorphology and Interfacial Structure of Platinum Nanoparticles in Catalyzing the Hydrogen Oxidation Reaction

摘要: This work studies the hydrogen oxidation reaction using both single mesoporous platinum nanoparticles (rnp = 23.1 ± 2.1 nm) and low density random arrays of material. The activity catalyst, toward hydrogen, is shown to be potential dependent exhibits two peaks in activity. These are measured at entity scale. alteration particle directly reflected variation electrochemical current. current do not relate a mass-transport limitation reaction, high overpotentials becomes fully inhibited. dependency revealed densities arises due sensitivity rate interfacial structure; decrease [at ca. −0.2 V vs Ag/AgCl (1 M KCl) nonbuffered condition] correlates with which underpotential deposited ...