121st General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code ELEC.P-606
Subject Gold nanoassemblies as efficient bifunctional catalysts for HER/OER
Authors Hyunjun An, Sujin Jo, Jun Ho Shim*
Department of Chemistry, Daegu University, Korea
Abstract The depletion of fossil fuels and increase in energy demand are critical challenging issues that cause for the finding alternative earth abundant energies and efficient devices of energy storage system. Solar and wind energy, and wave power are alternative energy sources for energy demand issue, while those are intermittent resources. Electrochemical water splitting is one of a promising way to convert electrical energy into chemical energy. Indeed, hydrogen fuel can be used as non-intermittent clean energy resources. Water splitting composed of two half reactions including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In this presentation, well-defined core-satellite gold nanoassemblies on carbon supports (CSN/C) were prepared and used as bifunctional catalysts for the effective overall water splitting. A unique and highly efficient synthesis process is an important goal in electrocatalysis with a well-controlled morphology. The electrocatalytic activity depends not only on the active site, but also on the surface morphology, particle sizes and surface area to volume ratio. The as-prepared CSNs exhibited significantly enhanced catalytic performances with high catalytic activity, favorable kinetics and strong durability towards electrocatalysis such as overall water splitting. The structural features were characterized by transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The electrocatalytic activity of the CSN/C for both HER and OER was investigated by rotating disk electrode and cyclic voltammetry. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A1B03930895).
E-mail ahj8903@gmail.com