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  • 09월 01일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Change of the polarization resistance during an electrochemical-chemical reaction

2016년 8월 30일 11시 12분 21초
ELEC.P-589 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 13일 (목요일) 11:00~12:30
저자 및
장병용*, 정휘석, 이설혁
부경대학교 화학과, Korea
Here we present an electrochemical simulation results comparing voltammetric current and resistance of a coupled reaction of electrochemical and chemical processes over a potential scan. For this work, the finite element method is used that are frequently used for voltammetry but rarely for impedance spectroscopy. Here, this method is used for simulation of a complex reaction where a heterogeneous faradaic reaction is followed by a homogeneous chemical reaction. By tracing the current and its polarization resistance, I studied their relationships to be explained in terms of rate constants of charge transfer and chemical change. An unexpected observation was made that even though the resistance is increased by the rate of the following chemical reaction, the current can be increased due to the potential shift of the resistance made by the proceeding faradaic reaction. This result telles that FEM-based resistance simulation can be applied to understand a complex electrochemical reaction. Until now, resistance simulations are mostly based on equivalent circuits or complete mathematical equations and have limitations to find proper models. However, this method is based on the first-principles, and is expected to be complementary to the other simulation methods.