Open AccessCatalitic effect of Co on hydrogen desorption form nanostucturated magnesium hydride
Author(s) -
Ljiljana Matović,
Sava Milovanovic,
Milica Drvendzija,
Jasmina Grbović Novaković
Publication year - 2008
Publication title -
hemijska industrija
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.147
H-Index - 19
eISSN - 2217-7426
pISSN - 0367-598X
DOI - 10.2298/hemind0803114m
Subject(s) - desorption , magnesium hydride , nucleation , isothermal process , materials science , hydride , activation energy , magnesium , thermal stability , thermal desorption spectroscopy , hydrogen , hydrogen storage , chemical engineering , diffusion , ball mill , metal , chemistry , adsorption , metallurgy , thermodynamics , alloy , organic chemistry , physics , engineering
To study the influence of 3d transition metal addition on desorption kinetics of MgH2 ball milling of MgH2-Co blends was performed under Ar. Microstructural and morphological characterization, performed by XRD and SEM, show a huge correlation with thermal stability and hydrogen desorption properties investigated by DSC. A complex desorption behavior is correlated with the dispersion of the metal additive particles on hydride matrix. The activation energy for H2 desorption from MgH2-Co composite was calculated from both non-isothermal and isothermal methods to be 130 kJ/mol which means that mutually diffusion and nucleation and growth of new phase control the dehydration process