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| Type |
Symposium |
| Area |
Recent Trends in Metal-Organic Frameworks |
| Room No. |
Room 401+402 |
| Time |
THU 16:30-16:50 |
| Code |
INOR1-3 |
| Subject |
Catalysis in nanostructured materials for energy-conversion |
| Authors |
Seok Min Yoon
Department of Chemistry, Wonkwang University, Korea |
| Abstract |
Nanostructured materials are highly suitable as electrocatalyst and photocatalyst supports in electrochemical energy conversion and solar energy coversion devices. The intrinsic performance of catalysts is affected by their intrinsic nanostructure, comprising nanoscopic building blocks whose properties can be altered by factors such as mechanical stresses, electric fields, magnetic fields, light irradiation and so on. Such materials are often discovered by serendipity but it would be highly desirable to design them in rational ways to achieve what can be termed as “Functionality by Design”. The catalytic capability requires development of various synthetic approaches and thorough understanding of physico-chemical properties across several length-scales – from individual nanocomponents all the way to macroscopic nanostructured materials.
In my talk, I will discuss such rational strategies applied to catalytic materials from zero- to three-dimensional and having hybrid architectures comprising nanoparticles as well as metal organic frameworks. I will illustrate the applications of such nanostructured in electrocatalysis in metal-air batteries , and in photocatalysis for water purification and potentially for artifical photosynthesis. In particular, the large single crystal MOFs we study exhibit bifunctional electrocatalytic behavior by supporting efficient and stable oxygen reduction reaction (ORR) close to the direct four-electron process, and oxygen evolution reaction (OER). This ORR/OER bifunctionality allows our MOF-based batteries to efficiently use humid air (i.e., oxygen and water) as “fuel”. Overall, the combination of these effects with aluminum anode translates into battery’s remarkable discharge capacity.
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| E-mail |
smyoon1@wku.ac.kr |
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123rd General Meeting of the KCS