27. Prof. Victor Climent - Electrochemistry with Single Crystal Electrodes

Full title: Interfacial Electrochemistry and Electrocatalysis with Single Crystal Electrodes Speaker: Prof. Victor Climent (Departamento de Química Física, University of Alicante, Spain) 00:00 - Introduction 02:51 - Beginning of the talk 04:52 - Why single crystals are needed? 10:39 - Surface crystallography 16:25 - Stereographic projection for surfaces 37:06 - Preparation of metal single cry stals 50:22 - Understanding the voltammetry of platinum 55:15 - Charge displacement by CO adsorption 59:10 - Role of anions in Pt electrochemistry 1:05:57 - Voltammetry of stepped surfaces 1:13:24 - Potential of zero charge on Pt (PZC) 1:28:59 - Total charge vs free charge 1:32:40 - Entropy of the interface and laser temperature-jump technique 1:40:34 - Pt nanoparticles 1:43:55 - Future directions for single crystal electrochemistry Q&A: 1:48:10 - Q1: Electrochemical cleaning of single crystal surfaces 1:51:21 - Q2: Cleaning of the surface of nanoparticles 1:53:02 - Q3: Assembling nanoparticles on a working electrode 1:56:47 - Q4: Stability of stepped surfaces in different pH 2:00:01 - Q5: Single crystals in RDE 2:04:16 - Q6: Number of electrons per Pt atom as a reference 2:06:14 - Q7: Connecting entropy and H2O ordering at interfaces 2:09:59 - Q8: Electrochemical impedance spectroscopy 2:12:28 - Q9: Model electrodes for enzymes and bioelectrochemistry https://www.electrochemicalcolloquium... #catalysis #chemistry #physics Abstract:  In this lecture, key aspects in interfacial electrochemistry, with emphasis in the context of electrocatalysis, will be explained. The lecture will begin with an introduction to surface crystallography, a description of the method of preparation of single crystal electrodes and well-defined electrode surfaces and a description of their electrochemical response. Then, the interphase between platinum and an electrolyte solution will be described emphasizing the importance of parameters such as charge separation, electric field and orientation of solvent molecules. Finally, the influence of all these parameters on electrochemical reactivity will be discussed.