9/23 Seminar Speech

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建立於 2019-09-17, 週二 16:43

最近更新於 2019-09-23, 週一 11:41

發佈於：2019-09-17, 週二 16:45

點擊數：4626

Speaker: Professor Tsan-Yao Chen

Topic: Next generation heterogeneous catalysis: structure confinement effects from nanometered to atomic scaled regimes

Date：9:10 , 2019.9.23

Speaker：Professor Tsan-Yao Chen

Organization：Department of Engineering and System Science, National Tsing Hua University

Topic：

Next generation heterogeneous catalysis: structure confinement effects from nanometered to atomic scaled regimes

 

Date：9:10 , 2019.9.23

Location：Room 203, College of Engineering

Education：

National Tsing Hua University / Department of Engineering and System Science / Ph.D.

National Cheng Kung University / Department Materials Science and Engineering / Bachelor

Work Experience：

National Tsing Hua University / Department of Engineering and System Science / Associate Professor & Deputy Chairman

National Tsing Hua University / Department of Engineering and System Science / Assistant Professor

Qualcomm Display Manufacturing Technology (Taiwan) / Failure Analysis, Product Engineering and Manufacturing / Senior Engineer

Taiwan Semiconductor Manufacturing Company / RD Diffusion, Advanced Technology / Principle Engineer

National Tsing Hua University / Department of Engineering and System Science / Postdoctoral Researcher

Abstract：

Surface decoration is an effective assessment for improving chemical stability of nanocatalysts. In this study, we demonstrate that the dimension of the surface decoration can be manipulated down to atomic scale. Apart from using noble metals, atomic scaled Pt clusters were employed to improve the oxygen reduction reaction performance of catalysts. Those clusters are decorated in surface defect regions of Cocore-Pdshell (Co-Pd) nanoparticles by using self-aligned nanocrystal growth followed by atomic quench with strong reduction agent. They localize electrons from neighboring atoms and boost activity of Co-Pd NP in ORR. With a proper reaction time and loading control, the Pt cluster decorated Co - Pd nanoparticles enhance its mass activity by 340 times as compared to that of commercial Pt catalysts in an alkaline electrolyte of 1.0M KOH.