Title:
Operando raman spectroscopy study of electrode surfaces

Thumbnail Image
Author(s)
Kim, Jun Hyuk
Authors
Advisor(s)
Liu, Meilin
Fuller, Thomas F.
Advisor(s)
Editor(s)
Associated Organization(s)
Series
Supplementary to
Abstract
Solid oxide fuel cells (SOFCs) are promising energy technology providing high efficiency with low emission. For SOFCs, a little modification on electrode surface can either dramatically enhance or hinder electrode processes. However, the inability to probe surface species/phases under operating conditions, the lack of information on the local properties of hot spots on heterogeneous surfaces, and the inadequate understanding of electro-catalytic mechanisms remain as critical challenges to understand corrosion/promoting dynamics of electrode surfaces. To tackle these problems, I used in situ/operando Raman spectroscopy coupled with electrochemical impedance spectroscopy as a powerful tool to monitor electrode surfaces. Therefore, I provided scientific basis for knowledge-based design of durable anodes against sulfur-poisoning and high-performance cathode for oxygen reduction reaction. Combination of in situ/operando measurements and density functional theory (DFT) calculation offers an effective approach to unravel the mechanisms of electrode reactions, and the developed methodology is applicable to study electrode/catalyst materials in other chemical and electrochemical systems as well.
Sponsor
Date Issued
2018-12-07
Extent
Resource Type
Text
Resource Subtype
Dissertation
Rights Statement
Rights URI