An optical microscope is probably the most intuitive, simple and commonly used instrument to observe objects and discuss behaviors through images. Although the idea of imaging electrochemical processes operando by optical microscopy was initiated 40 years ago, it was not until significant progress made in the last two decades in advanced optical mi...
Published in ACS Catalysis
Understanding how crystallographic orientation influences the electrocatalytic performance of metal catalysts can potentially advance the design of catalysts with improved efficiency. Although single crystal electrodes are typically used for such studies, the one-at-a-time preparation procedure limits the range of secondary crystallographic orienta...
Published in Frontiers in Chemistry
Prussian blue is an iron-cyanide-based pigment steadily becoming a widely used electrochemical sensor in detecting hydrogen peroxide at low concentration levels. Prussian blue nanoparticles (PBNPs) have been extensively studied using traditional ensemble methods, which only provide averaged information. Investigating PBNPs at a single entity level ...
The strategy proposed herein employs the scanning electrochemical microscope in a generation collection like mode to depict the mechanism implied in the electrosynthesis of metal oxides nanoparticles, NPs. It offers a simultaneous generation of the NPs precursors and a single NP-level electroanalysis by nanoimpact coulometry. The former process is ...
We report a strategy to electrochemically detect individual conducting particles colliding with an ultra-microelectrode (UME). This method, called "electro-catalytic depression" (ECD), enables the detection of particles that are electrically conducting but catalytically inert, such as carbonaceous particles. The ECD method takes advantage of the in...
Published in Frontiers in Chemistry
Since nanoparticles are frequently used in commercial applications, there is a huge demand to obtain deeper insights into processes at the nanoscale. Especially, catalysis, chemical and electrochemical reaction dynamics are still poorly understood. Thus, simultaneous and coupled opto-and spectro-electrochemical dark-field microscopy is used to stud...
