A structural review of nanoscopic Al1−xTMx phase formation in the TMCln enhanced NaAlH4 system

► Structural review of nanoscopic Al1−xTMx phase formation in TMCln enhanced NaAlH4. ► Crystalline fcc Al1−xTMx (x < 0.25) solid solutions for Sc, Ti, V, Cr, Mn, Zr and Pd. ► Numerous ordered crystalline Al1−xTMx phases for Cu, Ni, Pd and Pt. ► Crystalline bcc A2 and B2 Al1−xTMx type structures for Cr, Mn, Co, and Pd. ► Highly 'compressed' NaAlH4 phase for H cycled NaAlH4 + 0.1ScCl3.