کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1280442 | 1497601 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Improved tolerance of Pd/Cu-treated metal hydride alloys towards air impurities Improved tolerance of Pd/Cu-treated metal hydride alloys towards air impurities](/preview/png/1280442.png)
Electroless copper plating and colloidal Pd nanoparticle impregnation were shown to greatly improve the tolerance of a multi-component AB5-type alloy towards air impurities. Treated alloys demonstrated improved hydrogen absorption and desorption rates and tolerance towards air impurities when exposed to 0.5 MPa initial hydrogen pressure at room temperature. In addition, the readily-activated response was retained after the treated alloys had been exposed to air for 24 h. The removal of the surface oxide species and the spillover mechanism may have accounted for the enhanced hydrogenation kinetics of the alloys after treatment. Slight degradation of the hydrogen absorption rates with increasing air exposure was observed and was attributed to limitations in the protection provided by the Pd–Cu layer, resulting in a slow growth of an oxide layer on the alloy surface, which acted as a barrier for the transport of hydrogen atoms, towards the core of the AB5-type alloy material after hydrogen spillover.
Journal: International Journal of Hydrogen Energy - Volume 35, Issue 16, August 2010, Pages 8626–8630