Remarkable improvement of the turn–on characteristics of a Fe 2 O 3 photoanode for photoelectrochemical water splitting with coating a FeCoW oxy–hydroxide gel

Functional principle of the synergistic effect of co-loaded Co-Pi and FeOOH on Fe2O3 photoanodes for photoelectrochemical water oxidation

“…As observed from the SEM images ( Fig. S2), the as-prepared Fe2O3 shows the same coralline-like nanostructure we have previously reported [14,19]. No apparent changes in surface morphology were identified after d-FeOOH or h-FeOOH were loaded on the surface of Fe2O3, and this was likely attributed to the small loading amounts.…”

“…The use of OER catalysts for PEC water splitting has been demonstrated to ameliorate this problem by passivating the photoanode surface and/or accelerate the OER kinetics [17][18][19]. Most Earth-abundant OER catalyst materials comprise transition metal compounds, such as cobalt phosphate (Co-Pi) [20,21], nickel borate, Ni or Co oxides [22,23], Ni or Fe oxyhydroxides [24][25][26], and their complex oxides/oxyhydroxides [27,28].…”

Modulating Charge Transfer Efficiency of Hematite Photoanode with Hybrid Dual‐Metal–Organic Frameworks for Boosting Photoelectrochemical Water Oxidation

“…), constructing heterojunctions [ 25 ] with other semiconductors, passivating the surface states, [ 26,27 ] as well as depositing oxygen evolution electrocatalysts (OECs). [ 28–31 ] Among these strategies, integrating OECs with α ‐Fe 2 O 3 has been confirmed to accelerate the OER kinetics. For example, Zhong and co‐workers reported a α ‐Fe 2 O 3 photoanode modified with a CoPi cocatalyst, which has a more negative onset potential and enhanced PEC performance compared to the unmodified α ‐Fe 2 O 3 photoanode.…”

Crystal transformation of 2D tungstic acid H2WO4 to WO3 for enhanced photocatalytic water oxidation

“…However, TiO2 is a semiconductor with a wide band gap, only adsorbing UV light, and has a severe issue of recombination of photoinduced electrons and holes, which limits its performance in photo-splitting of water. Alternative semiconductors with intrinsic narrower bandgaps are being explored, such as MoS2 [6], CdS [7], NiO [8], Co3O4 [9], In2O3 [10], Fe2O3 [11,12], and Bi2O3 [13]. By analyzing the overall water splitting reaction, it is deduced that efficient large-scale production of hydrogen is hindered by the oxygen evolution reaction (OER) due to high energy demand for formation of O=O bond from two water molecules [14].…”