Useful Power Loss Led by Temporal Self-organization Appearing in Electro-chemical Oxidation System of Formic Acid on Pt-electrode

作者：Lin Feng; Luo Jiu-Li^*

来源：Chemical Journal of Chinese Universities, 2011, 32(6): 1384-1388.

• Electro-chemical oxidation of formic acid
• Electrochemical dissipation
• Electrochemical polarization
• Temporal self-organization in irreversible electrode process
• Useful power loss

In this paper both the threshold of potential oscillation and the trajectories of limit cycle beyond it in the electrochemical oxidation system of formic acid on Pt-electrode were analyzed and computed by nonlinear systematical dynamics under the assumption that the electrochemical reaction steps are dominate. Furthermore, by means of the dissipation-fluctuation theory of polarization based on stochastic thermodynamic the polarization curves, as well as the spectrum of power loss in both the critical regime and the temporal self-organization regime were also obtained. It turns out that the spectrum of power loss per unit electrochemical reaction will abruptly decrease during the current density (externally controlled) crossing its threshold (Hopf bifurcation point). Following with the appearance of the temporal self-organization the average power loss per unit electrochemical reaction per period still increase with the current, however it keeps at a level lower than that before threshold until the current arrives to certain high extent.

• 出版日期2011-6-10
• 单位四川大学