Mauron, Philippe Bielmann, Michael Remhof, Arndt Zuettel, Andreas Shim, Jae-Hyeok Cho, Young Whan 2024-01-20T18:31:16Z 2024-01-20T18:31:16Z 2021-09-05 2010-10-07 1932-7447 https://pubs.kist.re.kr/handle/201004/131008 We determined the stability of the LiBH4/CeH2 composite system by dynamic pcT (pressure, composition, temperature) measurements by using different constant hydrogen flows and by extrapolating In(p(des)/p(0)) linearly to equilibrium at zero flow. During desorption, the reaction 6LiBH(4) + CeH2 -> 6LiH + CeB6 + 10H(2) occurs, leading to a theoretical hydrogen capacity of the destabilized system of 7.4 mass %. Within the model used and by applying the Van 't Hoff equation, the following thermodynamic parameters were determined for the desorption: enthalpy of reaction Delta H-r = (58 +/- 3) kJ mol(-1) H-2 and entropy of reaction Delta S-r = (113 +/- 4) J K-1 mol(-1) H-2, leading to a decomposition temperature T-dec = (240 +/- 32) degrees C at a hydrogen pressure of p(0) = 1.01325 bar, compared with Delta H-r = 74 kJ mol(-1) H-2 and Delta S-r = 115 J K-1 mol(-1) H-2 (T-dec= 370 degrees C) for pure LiBH4.(1) English American Chemical Society REACTIVE HYDRIDE COMPOSITES HYDROGEN STORAGE MATERIAL METAL-BOROHYDRIDES REVERSIBILITY DECOMPOSITION KINETICS TI Stability of the LiBH4/CeH2 Composite System Determined by Dynamic pcT Measurements Article 10.1021/jp104222j 1 The Journal of Physical Chemistry C, v.114, no.39, pp.16801 - 16805 The Journal of Physical Chemistry C 114 39 16801 16805 scie scopus 000282209800093 2-s2.0-77957582351 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article REACTIVE HYDRIDE COMPOSITES HYDROGEN STORAGE MATERIAL METAL-BOROHYDRIDES REVERSIBILITY DECOMPOSITION KINETICS TI Hydrogen storage Complex metal hydride LiBH4 CeH2 Ball milling Thermodynamics PCT