Tuning the Electrode Activity to Expose Transformational and Electrocatalytic Characteristics of Individual Nanoparticles by Nanoimpact Electrochemistry

Nanoimpact electrochemistry (NIE) is a straightforward analytical technique to study at high throughput the reactivity of single nanoparticles (NPs) colliding with biased ultramicroelectrode (UME). As NIE can reveal both NP size and catalytic activity, this strategy be employed establish relationships between these two descriptors. Herein, it shown that electrode material crucial for visualizing simultaneously electro-catalytic processes transformation, which NPs. UMEs made gold (Au) or glassy carbon (GC), were reduction AgBr NPs electrocatalytic activity resulting Ag oxygen reaction (ORR). With Au UME, only transformation process probed, allowing quantitative analysis overpotential effect on dynamics When GC UME employed, subsequent ORR quantified very same