120th General Meeting of the KCS

Type Symposium
Area [Inorganic Chemistry - Materials Chemistry Divisions Joint Symposium] Molecules and Materials for Safe and Sustainable Future
Room No. Room 211+212+213
Time THU 15:25-:
Code IOMT-5
Subject Nanoparticles with structurally-dictated 3-D arrangement of multiple material phases: precursors to ideally performing nanocatalysts in electrolytic water splitting and fuel cell applications
Authors Kwangyeol Lee
Department of Chemistry, Korea University, Korea
Abstract Nanoparticle-based catalysis is intrinsically surface-confined, and thus the surface area of nanocatalyst should be maximized, which in turn raises the question of nanocatalyst structural stability during harsh catalytic condition. For example, nanoframes have been developed to maximally profit from the large surface area. However, their catalytic performances might rapidly deteriorate due to the collapse of the nanoframe structure consisting of tenuous connected nanowires. On the other hand, nanoparticle surface energy plays a crucial role in determining catalytic activity and stability, and is affected by the surface composition, crystal facet, surface strain, defects, and etc. Therefore, we have a daunting task of developing nanocatalyst systems exhibiting all the desired properties of 1) high surface area, 2) high structural robustness, and 3) fine-tuned surface energy. In this seminar, I will describe our current efforts on development of ideally performing nanocatalysts for electrolytic water splitting and H2 fuel cells, which have gained a great attention due to ever increasing environmental problems associated with fossil fuel usages. Specifically we focus on the synthesis of multiphasic nanoparticles, which exhibit regio-specifically located multiple material phases within a very small nanoparticle domain and are able to evolve into nanocatalysts with high surface area, high structural robustness, and fine-tuned surface energy.
E-mail kylee1@korea.ac.kr