A study of nanostructures formed in the hydrogen reduction of Fe(OH)3

A complex study of the hydrogen reduction of nanosized iron hydroxide Fe(OH) 3 at 400°C was performed. It was shown that, during the reduction of Fe(OH) 3 to iron metal α-Fe, intermediate compounds such as Fe(OH) 2 , α-FeOOH, β-FeOOH, γ-FeOOH, δ-FeOOH, and FeO are formed along with stable iron oxides α-Fe 2 O 3 , γ-Fe 2 O 3 , and Fe 3 O 4 . A scheme of chemical and structural transformations that occur in the reduction of nanosized Fe(OH) 3 is presented. The scheme takes into account the possibility of the bifurcation mechanism of reaction development.