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| Type |
Symposium |
| Area |
Nanoscale Structural Analysis of Energy Materials |
| Room No. |
402호 |
| Time |
FRI 09:40-: |
| Code |
MAT1-3 |
| Subject |
In-situ electrochemical X-ray absorption spectroscopic study of energy conversion nanomaterials
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| Authors |
유성종
한국과학기술연구원(KIST) 연료전지센터, Korea |
| Abstract |
A variety of novel composite materials have been used/tested for next-generation energy conversion devices. However, in many cases little is known about their properties and performance, although such fundamental understanding is essential for further advances in energy conversion technologies. Experiments (XRD, XPS, TEM and SEM etc.) may yield many clues to the behavior of those materials, but the interpretations of the local structure of nanomaterials are often controversial due largely to the difficulty of direct characterization. Under such circumstances, X-ray absorption spectroscopic approaches have emerged as one of the most powerful tools for understanding the surface local structure of new energy nanomaterials. This talk will focus on introducing our ongoing efforts in first principles modeling of energy conversion materials. In this talk, I will discuss the properties and performance of Pt(or Pd)-based alloy nanomaterials and composites PEMFCs, particularly the dissolution mechanisms of Pt(or Pd)-based alloy nanomaterials near the surface and interface, with comparisons to those in bulk Pt, as well as the surface and interface effects on the anode an cathode performance, such as oxidation/reduction reaction rate and stability.
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| E-mail |
ysj@kist.re.kr |
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119th General Meeting of the KCS