121st General Meeting of the KCS

Type Poster Presentation
Area Physical Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code PHYS.P-114
Subject Deposition of Palladium Nanoparticle on CdS Nanorod by Pulsed Laser Ablation in Liquid to Increase Photocatalytic Activity of Hydrogen Production
Authors YUJIN KIM, TaeKyu Kim*, Amaranatha reddy, Rory Ma
Department of Chemistry, Pusan National University, Korea
Abstract It is important to decrease the recombination rate of photogenerated carriers to improve the semiconductor-catalyzed solar-driven production of hydrogen. Recently, photocatalysts composed of active sunlight-harvesting photo-absorbers and stable metal co-catalysts have attracted significant attention. However, the size, clean surface, and highly dispersion of the metal co-catalysts are crucial factors affecting catalyst performance and reaction rate. Nevertheless, most of the available metal nanocrystals have been synthesized by complex procedures using harmful organic templates and stabilizers and high-purity compounds with high cost. To overcome these problems, in this study, the pulsed laser ablation in liquid approach was utilized to synthesize palladium and bimetallic palladium–platinum nanoparticles with an average size and distribution by adjusting the laser wavelength and fluence. A high rate of hydrogen evolution of 130.33 mmol g−1h−1 was obtained by using the optimized CdS-PdPt catalyst under simulated sunlight irradiation. This value is 51.31 times greater than that with bare CdS nanostructures. Furthermore, the amount of hydrogen produced was significantly better than that obtained by using several other noble metal co-catalysts deposited on CdS. This proposed strategy is thought to open new avenues for the design of advanced photocatalytic materials for efficient solar-driven production of hydrogen.
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