title: Homogeneous forced hydrolysis of aluminum through the thermal decomposition of urea.
abstract: Homogeneous hydrolysis of aluminum by decomposition of urea in solution was achieved because the urea coordinates to the Al3+ in solution, forming [Al(H2O)5 (urea)]3+ and to a lesser extent [Al(H2O)4 (urea)2]3+. Upon hydrolysis more hydrolyzed monomeric species, [Al(H2O)5 (OH)]2+, [Al(H2O)4 (OH)2]+, [Al(H2O)4 (urea)(OH)]2+, and [Al(H2O)3 (urea)(OH)2]+, were formed, followed by trimeric species and the Al13 Keggin complex [AlO4Al12(OH)24(H2O)12]7+. The 27Al NMR spectra indicated the formation of other complexes in addition to the Al13 at the end of the hydrolysis reaction.
authors.affiliation: Philips Lighting B.V., Frontstraat 4, 5405 AK Uden, The Netherlands.
authors.forename: R J M J
authors.initials: RJ
authors.lastname: Vogels
authors.forename: J T
authors.initials: JT
authors.lastname: Kloprogge
authors.forename: J W
authors.initials: JW
authors.lastname: Geus