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130th General Meeting of Korean Chemical Society Metal-Tipped Semiconductor Nanorods as Versatile 1D Model Catalysts for Photocatalytic Hydrogen Generation

Submission Date :
8 / 3 / 2022 , 18 : 40 : 53
Abstract Number :
Presenting Type:
Presenting Area :
Inorganic Chemistry - Inorganic Materials and Interfaces
Authors :
Hyunjoon Song
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
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Presenting Time :
Heterogeneous catalysis is basically a complicated system; for studying mechanisms and identifying important intermediates as in homogeneous catalysis, redefining reaction systems has been the primary strategy using a simplified catalyst model. The catalytic process mainly occurs on the surface, and the initial model catalyst was based on a single crystalline surface with desired facets. Multiple surface-dependent techniques were successfully applied to get critical information on significant heterogeneous catalytic reactions. However, the actual form of heterogeneous catalysts is multi-dimensional in many aspects – including three-dimensional morphology, mixed components, strong surface interactions with organic adsorbents and inorganic supports, and confined vacancies. Moreover, the surface is dynamic during the reaction, making it more difficult to identify active surface species. Then, how can we design a proper “model catalyst” to cover all features of heterogeneous catalysts and provide critical information on chemical processes? This talk will present successful model catalyst structures specifically applicable to photocatalytic reactions. We designed metal-tipped semiconductor nanorods as a versatile model for photocatalysts and investigated mechanistic aspects concerning catalyst morphology. As a result, we successfully decoupled multiple deterministic factors on catalytic activity and understood the relationship between catalyst structure and reaction properties. Through the series of research using our model catalysts, we hope to reach a universal principle of photocatalyst design in versatile reaction systems and help develop advanced photocatalyst systems with high activity and selectivity.