An electrochemical process and apparatus for preparing metal hydride compounds from metal salts under a hydrogen atmosphere are disclosed. The electrochemical process may be integrated with chemical reaction of a boron compound to produce borohydride compounds. A metal salt and a borate are charged to the cathode of an electrolytic cell wherein the borate reacts with the hydride, to produce the borohydride compound.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 The invention was made with Government support under Cooperative Agreement No. DE-FC36-04GO14008 awarded by the Department of Energy. The Government has certain rights in this invention.