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This is a Livestream Q&A/Ask Us Anything for answering YOUR questions on RU-vid. 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.
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Time stamps:
00:00 - Introduction
05:15 - Livestream starts
07:57 - I am using a mixed metal solution of two different metals to deposit. Which potential do I apply to reduce both of them, and how to determine how much is deposited?
21:21 - When using a screen-printed electrode with an Ag/AgCl reference on it, why do I need to add a separate Ag wire?
24:13 - I'm doing electrodeposition using chronopotentiometry, is the set current (-0.7 mA, very small) distributed evenly on the submerged substrate (so the set current will be divided by the surface area), or does the whole submerged substrate gets the same current?
28:08 - The deposition of a metal during the cathodic scan does not always show reduction peak, sometimes it show continuous increasing current. Can we explain why this can happen?
35:26 - How to calibrate a nonaqueous reference electrode?
39:30 - I have a question concerning EIS. I'm researching a corrosion system. In my EIS I see the expected semicircle. The problem I currently have is that sometimes the last few points (3-10 points) of the low-frequency data is shifted upwards and to the right. KK transform says these data points are bad. However I do not understand where the shift is coming from, it almost looks like artifacts and not really like its caused by system instability. Any thoughts on that? The frequency range is 100kHz to 0.01Hz
52:26 - What would be a good book to recommend to a beginner for electrochemistry?
55:16 - I am a beginner learning about cyclic voltammetry. Could you please explain the relationship between a cyclic voltammetry graph (duck shape) with the standard reduction potentials?
1:00:03 - I think it'd be better to use chronoamperometry with sufficient potential instead to get a better coating. So you need to know the needed current density and the submerged surface area to get a homogeneous and reproducible coating, right?
1:04:21 - In water splitting, electrochemically active surface area (ECSA) is determined separately for HER and OER for the same electrode. Is it possible for an electrode to have two active surface areas?
1:10:16 - Is it possible to do Mott-Schottky on thin films that are not coated completely with the material? I can't get the right curve, even after following literature
1:19:29 - In screen printed electrodes, how to make the Ag reference electrode not get oxidized over a time?
1:27:51 - We get Tafel constants at high overpotentials. For diffusion/mixed control, we don't observe Tafel region. Is there a way to find Tafel constant for diffusion/mixed control processes?
1:32:31 - Any tips for equivalent circuit fitting? How big of an error is still considered "good fitting"? I've been changing values for hours to get a good fit. I hope the Warburg region in the lower frequencies can be ignored, that part is hard to fit
4 авг 2024
