2022.04.21 Yujia (Jerry) Zhai, Pennsylvania State University
Table of Contents below.
This presentation is made available by the The Nanotechnology Applications and Career Knowledge (NACK).
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Full Title: Where Electricity and Light Meet: The Power of Infrared Spectroelectrochemical Techniques in Observing Surface Chemistry
In daily lives, there are many applications relying on electrochemistry, a branch of chemistry that deals with interconversion of chemical energy and electrical energy. For example, batteries convert stored chemical energy into electrical energy inside devices like smartphones. Electrocatalysts are types of chemicals which can increase the speed, efficiency and selectivity of electrochemical reactions that happen on electrode surfaces. Nanomaterials are especially excellent electrocatalysts due to larger number of reactive atoms on the surfaces compared to those on bulk materials as well as their flexibility for post-processing. On the other hand, the role of electrocatalysts play during electrochemical reactions is difficult to interpret because of the complexity of nanomaterial itself as well as chemical reactions that happen at the interface of solid electrodes and liquid electrolytes.
The aim of the talk is to introduce a state-of-the-art spectroscopic technique based on infrared spectroscopy that can be used to characterize the chemical species adsorbed on the electrode surfaces and provide ample information about the changes in the structures of adsorbed species under different conditions.
Table of Contents:
00:00 Where Electricity and Light Meet
02:35 In 100 years, humans will have little reserves of fossil fuels.
03:49 Renewable and clean energy will replace fossil fuels.
05:13 Electrochemistry
07:21 Electrocatalysis/electrochemistry
09:12 Challenges to improve selectivity and activity of electrocatalys
11:28 Why do we use Infrared Spectroscopy?
14:00 ATR geometry of IR measurements
16:31 Surface enhancement principles
19:39 To achieve surface enhancemen
21:06 The setup of ATR-SEIRAS
23:53 Reaction cell design
25:18 Procedures for a typical ATR-SEIRAS measurement:
26:45 After a series of experiment
28:37 On different metals
33:08 ATR-SEIRAS is powerful
35:17 Tips for starting ATR-SEIRAS:
37:10 Slide 18: Untitled
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