Chloride-substitution in sodium borohydride

The changes in structure and stability of NaBH4 on Cl-substitution obtained in mechanochemical reactions between NaBH4 and NaCl have been investigated by conventional and synchrotron radiation powder X-ray diffraction, differential scanning calorimetry and temperature programmed desorption. Powder X-ray diffraction shows an apparent full homogeneity range between NaBH4 and NaCl, giving Na(BH4)1−xClx phase where x corresponds to the ratios of the initial reagents. Differential scanning calorimetry indicates that the Cl-substitution stabilizes the product, by increasing temperature for melting and desorption.