Role of lithium vacancies in accelerating the dehydrogenation kinetics on a LiBH4(010) surface : an Ab initio study
Du, A.J., Smith, Sean.C., Yao, X.D., & Lu, G.Q. (2007) Role of lithium vacancies in accelerating the dehydrogenation kinetics on a LiBH4(010) surface : an Ab initio study. The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter, 111(32), pp. 12124-12128.
In this work, ab initio density functional calculations were performed to explore the effect of surface lithium vacancies on the initial dehydrogenation kinetics of lithium borohydride. We found that some B−H bonds in neighboring BH4-1 complexes around the vacancy became elongated (weakened). The activation barriers for the recombination of H atoms to form H2 were decreased from 3.64 eV for the stoichiometrically complete LiBH4(010) surface to 1.53 and 0.23 eV in the presence of mono- and di-vacancies, respectively. Our results indicate that the creation of Li vacancies may play a critical role in accelerating the dehydrogenation kinetics of LiBH4.
Impact and interest:
Citation counts are sourced monthly from and citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from theindexing service can be viewed at the linked Google Scholar™ search.
|Item Type:||Journal Article|
|Keywords:||Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Hydrogen Storage Properties Total-energy Calculations Walled Carbon Nanotubes Augmented-wave Method Elastic Band Method Saddle-points Basis-set Ti 1st-principles Nanopar|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Deposited On:||08 Jul 2013 04:14|
|Last Modified:||29 Jul 2013 00:28|
Repository Staff Only: item control page