ABSTRACT
Scanning electrochemical microscopy (SECM) provides an invaluable tool for both the discovery of new materials (electrocatalysts and photocatalysts) and their characterization. The discovery involves the rapid preparation of arrays of small (approximately hundreds of micrometer diameter) spots of different compositions. These can be examined and screened rapidly with an SECM tip producing a visual image, for example, of the current produced at a given spot at a given potential, that can be used to judge the relative ef–cacy of a given composition. Several different screening schemes are available that are selected by considering the nature of the electrocatalytic reaction of interest. These are described in Section 16.2 along with examples of different electrocatalysts and reactions.
