Presentation Information
[8a-B31-8]A Gravity-Assisted Spontaneous Oscillatory Electrochemical Reactor
〇Guanting Liu1, Masahiro Takinoue2, Daisuke Yokogawa1, Daisuke Kiriya1 (1.UTokyo, 2.Science Tokyo)
Keywords:
electrochemistry,oscillation
Electrosynthesis represents a green and material-economic strategy for organic transformations. However, its efficiency is often hindered by sluggish convective mass transfer and limited electrochemical surface area. Once the electrode surface becomes covered by the accumulated products, the escalating overpotential can trigger various side reactions, such as gas evolution, thereby inducing electrochemical oscillation phenomena. Typically, these oscillations result in excessive energy consumption and are highly undesirable.Interestingly, here we demonstrate a gravity-assisted, spontaneous oscillation phenomenon that, contrastingly, enhances the efficiency of electrochemical synthesis. Specifically, under potentiostatic mode, the product yield obtained in the oscillating state is twice that achieved under non-oscillating conditions. Under galvanostatic mode, the electrosynthesis proceeds stably during oscillation. In contrast, in the non-oscillating state, product coverage on the electrode surface causes the voltage to abruptly surge to the compliance limit of the equipment, thereby terminating the reaction. Ultimately, this study uncovers a novel gravity-assisted oscillatory mechanism that fundamentally circumvents electrode passivation, providing fresh insights into achieving long-term stability in organic electrosynthesis.