電極反應(yīng)動力學(xué)燃料電池(完整版)
【正文】 e shows the actual total current, which is the sum of the ponents ic and ia, shown as dashed traces. ? For large negative overpotentials, the anodic ponent is negligible。Towards a Sustainable Energy Future 2022 Spring Fuel Cell and Electrochemistry Lecture 9 Kiics of electrode reactions Towards a Sustainable Energy Future Dynamic Equilibrium Towards a Sustainable Energy Future Dynamic Equilibrium ? The kiic theory therefore predicts a constant concentration ratio at equilibrium, just as thermodynamics does。 . The cathodic and anodic activation energies are Towards a Sustainable Energy Future ? Where α, the transfer coefficient Towards a Sustainable Energy Future Towards a Sustainable Energy Future Standard Rate Constant ? It simply is a measure of the kiic facility of a redox couple. ? A system with a large k0 will achieve equilibrium on a short time scale, but a system with small k0 will be sluggish. ? The largest measured standard rate constants are in the range of 1 to 10 cm/s, and are associated with particularly simple electrontransfer processes. – Molecular rearrangement upon electron transfer or multistep process can be very sluggish Towards a Sustainable Energy Future
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