Author/Authors :
Park، نويسنده , , Eun Hee and Uk Jeong، نويسنده , , Seong and Ho Jung، نويسنده , , Un and Kim، نويسنده , , Sung Hyun and Lee، نويسنده , , Jaeyoung and Woo Nam، نويسنده , , Suk and Hoon Lim، نويسنده , , Tae and Jun Park، نويسنده , , Young and Ho Yu، نويسنده , , Yong، نويسنده ,
Abstract :
This study investigated an electrochemical method for recycling sodium metaborate ( NaBO 2 ) to sodium borohydride ( NaBH 4 ) . Palladium (Pd), boron-doped diamond (BDD), gold (Au) and platinum (Pt) were used as electrodes. Cyclic voltammetry and chronoamperometry were used to recycle the NaBO 2 either to NaBH 4 or to an intermediate material for making NaBH 4 . The electrochemical products were characterized by X-ray diffraction (XRD) as well as B 11 nuclear magnetic resonance ( Be 11 NMR) and Fourier transform infrared (FT-IR) spectroscopy. Borax was generated preferentially on the Pd and BDD electrodes compared with Pt only at a constant potential of + 1.54 V vs. Hg/HgO. An analysis of the XRD and FT-IR data clearly showed the formation of borax hydrate with a higher reactivity than NaBO 2 .
Keywords :
sodium borohydride , Borax , recycling , Sodium metaborate
