Optimization of metal co-catalysts for CdSe@CdS dot-in-rod nanostructures to enhance photocatalytic hydrogen generation Bumjin Park 1 , Won-Woo Park 2 , Oh-Hoon Kwon *,2 and Hyunjoon Song *,1 1 Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea, 2 Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea Hydrogen gas is one of the crucial chemicals in energy applications. Photocatalytic hydrogen generation using solar energy is a promising future technology, with metal-semiconductor nanostructures. Delaying the recombination of electron-hole pairs is crucial in the charge separation process, which can be achieved by spatially and energetically separating. In this work, a rough Pt-coated Au cocatalyst (Au@r-Pt) was deposited at CdSe@CdS dot-in-rod nanorods to maximize charge separation and surface reactivity. Hydrogen generation performance showed that the Au@r-Pt displayed a four-fold higher reaction rate compared to round Pt at 455 nm. Further photophysical analysis demonstrated the improvement in charge-trapping ability.The precise engineering and manipulation of metal tips as co-catalysts offer promising opportunities to enhance charge separation for other metal-semiconductor hybrid systems.
P207E
Made with FlippingBook Learn more on our blog