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Title: Direct synthesis of calcium borohydride

A method is disclosed for directly preparing an alkaline earth metal borohydride, i.e. Ca(BH.sub.4).sub.2, from the alkaline earth metal hydride and the alkaline earth metal boride. The borohydride thus prepared is doped with a small portion of a metal chloride catalyst compound, such as RuCl.sub.3, TiCl.sub.3, or a mixture of TiCl.sub.3 and palladium metal. The process provides for mechanically mixing the dry reagents under an inert atmosphere followed by charging the mixed materials with high pressure hydrogen at about 70 MPa while heating the mixture to about 400.degree. C. The method is relatively simple and inexpensive and provides reversible hydride compounds which are free of the usual contamination introduced by prior art wet chemical methods.
Authors:
 [1] ;  [2]
  1. Dublin, CA
  2. Pleasanton, CA
Publication Date:
OSTI Identifier:
982370
Report Number(s):
7,608,233
US patent application 11/807,012
DOE Contract Number:
AC04-94AL85000
Resource Type:
Patent
Research Org:
Sandia National Laboratories (SNL-CA), Livermore, CA
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY