Nanoimpact Electrochemistry to Quantify the Transformation and Electrocatalytic Activity of Ni(OH) 2 Nanoparticles: Toward Sizeactivity Relationship at High Throughput
Résumé
The fast establishment of structure-reactivity relationships is crucial to identify the most appropriate nanoparticles (NPs) for a given application. This requires the development of methodologies allowing, simultaneously, to unravel the NPs geometry and screen their reactivity. Herein nanoimpact electrochemistry (NIE) allows quantifying the transformation and measuring the electrocatalytic activity for the oxygen evolution reaction (OER) of >100 Ni(OH) 2 NPs of a wide range of size (NP radii from 25 to 100nm). This is achieved by scanning electrochemical microscopy in a generation/collection like mode, one electrode being used to electro-generate by local precipitation colloidal Ni(OH) 2 NPs and the second one to collect them by NIE. It allows i)
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