From Bulk to Nanosurfaces: The Cases of Electrocatalysts towards Hydrogen Evolution Reaction in Alkaline Media

Sang-Il Choi, Ph.D.

Department of Chemistry and Green-Nano Materials Research Center

Kyungpook National University, Daegu 41566, Republic of Korea

Surface chemistry has been established from fundamental to practical research, especially catalysis, by utilizing bulk surfaces. Since catalysis occurs at the interface between molecules and molecules or between atoms, it is necessary to look at the actual catalysis environment. In addition, the demand for practical application is rapidly increasing, bulk surfaces must be scaled down to nanosurfaces to understand the parameters operating in real catalysis situation. Therefore, researchers have developed advanced nanocatalysts to understand nanosurface chemistry. Shape-controlled nanocrystals have been prepared for facet-dependent catalysis, and alloyed or bifunctional particles have been extensively investigated for enhancement of catalytic performances. In this presentation, PdH@Pt core-shell and RuC nanosurfaces are introduced to understand alkaline hydrogen evolution reaction (HER). On the nanosurface of the PdH@Pt core-shell catalyst, the correlation between the tendency of the electrochemical HER dependent on the ligand and the strain effects is discussed. The RuC nanosurface presents improved HER activity by presenting a bifunctional catalyst containing active sites to simultaneously promote water dissociation and hydrogen generation.

* 졸업논문 교과목 수강자 세미나 필수 참석 안내
석사, 석박통합, 박사과정이 수강하는 <졸업논문연구학점 1~6>수강자는 학과에서 개최하는 목요일 정규세미나에 반드시 참석해야함.

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