Simultaneous enhanced electrochemical and photoelectrochemical properties of α-Fe₂O₃/graphene by hydrogen annealing

Abstract

Two-dimensional (2D) materials have attracted extensive attention in various fields due to their good flexibility, high specific surface area and fast ion transfer rate. Herein, the α-Fe 2 O 3 nanoparticles/ graphene composites have been prepared through a hydrothermal method, which is followed by hydrogen annealing to produce oxygen vacancies. Electrochemical properties and photoelectrochemical properties are investigated. The results present a high specific capacitance and the electrochemical properties are improved ascribing to the synergistic effect of graphene's large specific surface area and excellent electrical conductivity, as well as the pseudocapacitance of transition metal oxides. Moreover, it also promotes the photoelectric response performances in visible light. This work provides a basis for the development and application of transition metal oxide in electrochemical and photoelectric fields.

Solid-State Dispersions of Platinum in the SnO2 and Fe2O3 Nanomaterials

“…Figure 11, panel (b) shows the high-resolution Fe 2p spectrum. The two distinct peaks at binding energies of 710.8 eV for Fe 2p 3/2 and 724.7 eV for 2p 1/2 are consistent with Fe 3+ in α-Fe 2 O 3 [26]. In addition, two satellite peaks characteristic of α-Fe 2 O 3 at 719.8 eV and 732.5 eV are clearly visible [22,25].…”

Magnetism and Raman Investigations of Hydrothermally Reduced Graphene Oxide-Incorporated α-Fe2O3 Nanocomposites: The Role of Temperature-Dependent Charge Transfer-Induced Interfacial Interactions

“…28 The decrease in binding energies of Fe 2p spectra in FRGO is a validation of the charge transfer from NPs to matrices via the p z -d hybridization at the interface. 29,30 The O 1s spectrum of FRGO is illustrated in Figure 3d. The characteristic peak of Fe−O (529.62 eV) in FRGO is broadened and shifted to lower binding energy compared to pure FO (529.69 eV), shown in Figure S3c.…”