Solution-mediated nanometric growth of α-Fe₂O₃ with electrocatalytic activity for water oxidation.

ABSTRACT: This paper describes a simple, low-temperature, and environmentally friendly aqueous route for the layer-by-layer nanometric growth of crystalline α-Fe₂O₃. The formation mechanism involves alternative sequences of the electrostatic adsorption of Fe²⁺ ions on the surface and the subsequent onsite oxidation to Fe³⁺. A combination analysis of X-ray diffraction, scanning electron microscopy, UV-Vis spectroscopy, and X-ray photoelectron spectroscopy revealed that α-Fe₂O₃ is directly formed without post-growth annealing via designed chemical reactions with a growth rate of ca. 1.7 nm per deposition cycle. The obtained α-Fe₂O₃ layer exhibits electrocatalytic activity for water oxidation and, at t

SUBMITTER: Taniguchi A 

PROVIDER: S-EPMC9417511 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature