Enhanced photoelectrochemical performance of an α-Fe2O3 nanorods photoanode with embedded nanocavities formed by helium ions implantation

Recent advances on interfacial engineering of hematite photoanodes for viable photo‐electrochemical water splitting

“…Ren et al fabricated the porous α‐Fe 2 O 3 nanorod arrays with nanocavities by helium ions implantation (Figure 14(A)). 143 The nanocavities reduced the hole diffusion length and improved the separation efficiency of the photogenerated carriers. The photocurrent density reached 1.270 mA cm −2 at 1.6 V RHE , which was 2‐fold of the raw α‐Fe 2 O 3 .…”

“…(A) Schematic illustration of the synthesis process of the porous α‐Fe 2 O 3 NRAs on FTO substrate. Source: Reprinted with permission from Reference 143 copyright (2020) Elsevier Ltd. (B) Schematic illustration of the PEC water oxidation mechanism in FeF x /F‐Fe 2 O 3 photoanode. Source: Reprinted with permission from Reference 144 copyright (2020) Royal Society of Chemistry…”

Fe-Ce/Layered Double Hydroxide Heterostructures and Their Derived Oxides: Electrochemical Characterization and Light-Driven Catalysis for the Degradation of Phenol from Water

“…To entangle the photocatalytic properties of the LDH to that of CeO 2 , we previously reported on CeO 2 /Mg(Zn)Al-LDH heterostructures [ 33 ]. On the other hand, hematite (αFe 2 O 3 ) with small range bandgap (~2.2 eV), which can collect visible light, is a semiconductor material widely used in water splitting and as a supercapacitor electrode due to advantages such as: good chemical stability, photocorrosion resistance [ 33 , 34 , 35 ] and absorption capacity in the region of visible light [ 36 ]. Disadvantages of this material include: low mobility and the fast recombination properties of charge carriers resulting in the 2–4 nm diffusion lengths of the minority carriers [ 34 ].…”

Enhanced photoelectrochemical water oxidation over a surface-hydroxylated BiVO4photoanode: advantageous charge separation and water dissociation

“…In order to further explore the reason for the increased PEC water oxidation properties of the hydroxylated BiVO 4 photoanode, the electrochemical impedance spectroscopy (EIS) was investigated, in which the arc radius reflects the charge transfer resistance. 43 Compared with bare BiVO 4 photoanode, the arc radius of BiVO 4 -1–30 is smaller, which indicates that the hydroxylated surface reduces the charge transfer resistance for the improved water oxidation kinetics (Fig. 6a).…”