کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
221439 | 463400 | 2006 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Determination of hydrogen absorption isotherm and diffusion coefficient in Pd81Pt19 alloy Determination of hydrogen absorption isotherm and diffusion coefficient in Pd81Pt19 alloy](/preview/png/221439.png)
In the present paper, hydrogen absorption into Pd81Pt19 foil was studied using the permeation and impedance techniques. Pd81Pt19 is an interesting alloy in which the α-phase is extended to high hydrogen concentrations. The total amount of hydrogen absorbed is smaller than that in pure palladium and the absorption plateau is obtained at negative overpotentials. An important error in the absorbed hydrogen amount can be made if the measurements are performed in a stagnant solution because of the dissolved hydrogen formation; its charge adds to the absorbed hydrogen oxidation charge.The hydrogen diffusion coefficient was determined by various permeation and impedance techniques. They gave similar values with the exception of the small differential step permeation technique and EIS in the transmissive mode. Hydrogen induced stress might be at origin of the deviations observed in the permeation studies.
Journal: Journal of Electroanalytical Chemistry - Volume 588, Issue 1, 1 March 2006, Pages 32–43