Temperature dependence study of CO desorption kinetic from Pt electrodeposited on carbon paper fuel cell electrode using a simple electrochemical method

Temperature dependence of CO desorption kinetic from Pt electrodeposited on carbon paper using a simple, inexpensive and ex-situ electrochemical method has been investigated. Kinetic parameters such as activation energy and rate constant of desorption can be obtained by this method. CO surface coverage at each temperature was determined by monitoring changes in Had desorption charge during CO stripping at different desorption time (300 to 1800 s) and desorption rate constants were calculated. From 25 to 85 °C, desorption rate constant increases from 6.1 ×10−5 to 4.4 ×10−4 s−1. The activation energy for desorption of CO was 28480 J.mol-1 according to Arrhenius equation. For approving this approach, kinetic rate constant data validation at selected temperature was done and demonstrated the potential of this procedure for investigating and predicting CO desorption rate constant at various temperatures

کلیدواژه ها:

CO Poisoning ، Kinetics Desorption ، PEM Fuel Cell ، Cyclic Voltammetry ، Temperature