Constructing large-size and ultrathin NiCoP nanosheets on an Fe₂O₃ photoanode toward efficient solar water splitting

Abstract

The charge recombination at the photoanode/cocatalyst interface and sluggish surface oxygen evolution reaction (OER) kinetics severely restrict the improvement of the photoelectrochemical (PEC) performances. Herein, we demonstrated the construction of...

Mg-Doped Hematite Nanoparticle Arrays Coated with CoPi Thin Films for Solar Water Oxidation

“…18 Besides, the peak at 781.1 eV belongs to Co−PO x . 29 The phosphorus peak in pristine Co−Pi thin film was observed at 132.6 eV, which is close to that of FePO 4 (Figure 2f), implying that P as an n-type dopant partially replaces the Fe atom to form a P−O bond. 30 3.2.…”

“…In Figure e, the peaks at 797.2 and 785.6 eV belong to Co 3+ 2p 3/2 and Co 2+ 2p 1/2 in CoPi/Mg–Fe 2 O 3 , respectively . Besides, the peak at 781.1 eV belongs to Co–PO x . The phosphorus peak in pristine Co–Pi thin film was observed at 132.6 eV, which is close to that of FePO 4 (Figure f), implying that P as an n-type dopant partially replaces the Fe atom to form a P–O bond …”

Suppression of Undesired Losses in Organometal Halide Perovskite‐Based Photoanodes for Efficient Photoelectrochemical Water Splitting

“…[5,6] The main limitation to achieving high solar-to-hydrogen conversion efficiency in unassisted solar water splitting is the relatively lowefficiency of photoanodes compared with that of photocathodes. [7][8][9] Thus far, various materials have been investigated as candidates for photoanodes, including WO 3 , [10,11] Fe 2 O 3 , [12][13][14] BiVO 4 , [15][16][17][18] Ta 3 N 5 , [19][20][21] and Si. [22,23] However, these photoanodes still exhibit unsatisfactory efficiencies for PEC water oxidation.…”

In situ integration of a cocatalyst and heterojunction to a WO3 photoanode with enhanced photoelectrochemical performance via phosphatization

“…For example, CoPi, 11 NiP x , 12 FeNiP 13 and NiCoP. 14 The loading of a cocatalyst can increase the surface injection efficiency of photogenerated holes at the photoanode/electrolyte interface and accelerate the kinetic process of the surface water oxidation reaction, but it should be noted that a new interface of photoanode semiconductor/cocatalyst is introduced. At present, there are many reports on the photogenerated hole injection efficiency, but the charge transfer at the new semiconductor/cocatalyst interface is less studied.…”