首页 | 本学科首页   官方微博 | 高级检索  
     检索      


H(2) formation by electron irradiation of SBA-15 materials and the effect of Cu(II) grafting
Authors:Brodie-Linder Nancy  Le Caër Sophie  Alam Mohammad Shahdo  Renault Jean Philippe  Alba-Simionesco Christiane
Institution:Laboratoire de Chimie Physique, UMR 8000, Université de Paris-Sud, Bat. 349, 91405 Orsay, France. nancy.brodie-linder@cea.fr
Abstract:Measurement of H(2) production from electron irradiation (10 MeV) on SBA-15 materials has shown that adsorbed water is attacked preferentially. Silanol groups are only attacked when they are in the majority with respect to adsorbed water, however they are much less efficient at producing H(2). The comparison between water content before and after electron irradiation and the corresponding H(2) production indicates that water desorption is the main route to adsorbed water loss for SBA-15 materials. On the other hand, surface silanol groups are more susceptible to attack, leading to H(2) production when SBA-15 samples have undergone extensive thermal treatment. Electron irradiation of SBA-15-Cu materials has shown that the presence of Cu(II) on the surface reduces and inhibits the production of H(2.) This inhibiting power affects adsorbed water bonded to grafted copper but not surface silanol groups.
Keywords:
本文献已被 PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号