Episode #52: How to calculate the electrochemically active surface area (ECSA) скачать в хорошем качестве

Episode #52: How to calculate the electrochemically active surface area (ECSA)

This is a Livestream Q&A/Ask Us Anything for answering YOUR questions on YouTube. In this Q&A session we will answer your electrochemistry research questions LIVE, as well as any other questions related personal topics like careers, academia, industry, or life in general. We have compiled a database of all questions asked in our Ask Us Anything About Electrochemistry Livestreams, tagged by the question subject and linked with time stamps to the place in that week's Livestream. If you are interested in obtaining a copy of this database (MS Excel file), please reach out via comments here or directly to us at pinewire@pineresearch.com. Check out https://aftermathlive.com, Pine Research's online electrochemical simulation software! Perfect for the classroom or research lab, licenses are available for simulating CV and bulk electrolysis of a variety of chemical and electrochemical reactions. Accessible on both PC and Mac! Time stamps: 00:00 - Livestream starts 04:48 - Please explain the method of calculating ECSA and the Tafel slope with AfterMath software? 16:27 - Can you explain how to find the number of electrons from CV? 22:17 - We mostly try to perform CV measurements within a potential range where no peaks are present. Do you have any data example that could be used for calculating ECSA? 28:20 - Could you please explain a suitable method to calculate ECSA for a silver material modified GCE? 33:07 - A modified reference electrode connected in series with a capacitor and platinum wire is used to improve impedance spectra in the high-frequency region. Can you explain how it physically works? 42:23 - Can you explain voltage drop from OCV in a battery when discharging and how does Ohm's law apply to it if I'm discharging into the grid? 45:43 - Could you explain what Tafel slopes tell us about the kinetics of a reaction? What exactly can you use them for? Could you give an example? And what physical information does the Debye length convey? 55:53 - I have a Tafel plot where the slope came out to be 1528 mV, isn't that a very high value? 58:50 - I am designing a screen printed electrode using thermal deposition for radical sensing. Can Ag metal be used for the working and counted electrode? Also can Ag/AgCl paste be used for the reference electrode? 1:00:38 - To prepare catalyst ink and deposit it onto a GCE, how much of the powder material should we consider? What should be the concentration of the ink to achieve good data? I'm working in OER? 1:04:46 - What software can I use to design the physical dimensions and simulate a screen printed electrode? 1:10:16 - I'm doing LSV of my material for HER but after -420 mA current density the LSV graphs gets parallel with the X-axis? What is happening? 1:14:05 - When calculating H2 PEM electrolyzer voltage I need to use Nernst equation to get cell voltage, I need partial pressures of H2, O2, and H2O and I can't understand how to get them. 1:29:35 - When is it appropriate to use linear kinetics vs Tafel kinetics? 1:32:06 - Usually, carbon materials don't show a semicircle region in the higher frequency region on EIS analysis. What is the reason for that? I'm testing activated carbon as EDLC type electrode materials. 1:35:52 - Should we use positive feedback or solution resistance of impedance for iR compensation of LSV? 1:38:05 - Can you please explain the difference between kinetics and thermodynamic issues in the electrochemical cell? 1:40:54 - I want to know about controlled potential electrolysis 1:43:48 - Can I put Pine electrode in a vacuum? 1:49:12 - Considering an impedance spectrum of a corroding sample, can the charge-transfer-resistance be directly correlated to corrosion resistance? 1:53:33 - What is the reason for inductive loops at lower frequency in EIS? At high frequency it is attributed to wiring etc right? 2:07:26 - We are trying to develop an Ion Selective Membrane by the voltage values in the selected ion (calcium) keep on drifting from week to week. Any ideas how to stabilize it? 2:10:37 - What are the drawbacks with trying to measure kinetics (Tafel slope and exchange current) without RDE?