Microwave-assisted sequential Pt/Al attachment on FeOOH for fabrication of highly efficient hematite photoanodes: Synergistic effect of Pt/Al co-doping and Al2O3 passivation layer

Selective placement of modifiers on hematite thin films for solar water splitting

“…Despite its modest photocurrent at 1.23 V vs. RHE and lower current generated due to light absorption ( J abs ), the η overall of Ga0.5HHf3.0_NiFeO x is only rivaled by E-Ti-Fe 2 O 3 photoanode, 66 which was prepared by a multi-step process including hydrothermal synthesis followed by electrodeposition of CoP i and a subsequent KOH treatment. When compared with recent dual modification strategies reported in the literature (Table S3†), 15,22,24,25,27–30,74–76 it becomes clear the new method leads to synergistic roles for Ga 3+ and Hf 4+ , resulting in superior overall photoelectrode efficiency, as shown in Fig. 4e and f.…”

Influence of Successive Zirconium and Beryllium Codoping Strategies on Advancing Bulk and Surface Properties of Hematite Photoanodes for Boosting Photoelectrochemical Water Splitting

“…It is evident that the Zr-HT has a two-fold greater N D than Bare-HT, demonstrating improved electrical conductivity and prolonging the lifespan of the charge carriers. However, Be-HT does not have a higher N D value than Bare-HT because Be 2+ does not form Fe 2+ ions in the lattice, 43 as discussed earlier. On the other hand, however, Zr/Be-HT shows an increased N D than the Zr monodoped one.…”

“…Furthermore, to evaluate the amount of gas evolution, a well-known cobalt phosphate (Co–Pi) cocatalyst was deposited onto the Zr/Be-HT photoanode using the electrodeposition method, as previously stated . As illustrated in Figure f, the Co–Pi-coated Zr/Be-HT photoanode displays a PD of 2.07 mA/cm 2 at 1.23 V RHE and retained 97.2% of initial stability after 10 h of continuous 1-sun illumination.…”

Composition modulation of a hematite photoanode for highly efficient photoelectrochemical water oxidation

“…[3][4][5] Nevertheless, the PEC conversion efficiency of an α-Fe 2 O 3 photoanode is limited by its low conductivity, severe charge recombination efficiency and sluggish surface kinetics. [6][7][8][9] Various methods have been developed to tackle the aforementioned drawbacks, including the introduction of passivation layers, 10,11 secondary annealing, 12 deposition of co-catalysts, [13][14][15] etc. In addition to these, the spatial distribution of the Fe and O elements has been proved to play important roles in the semiconductor bulk charge transport and surface water oxidation properties, and hence the PEC performances.…”

“…Various methods have been developed to tackle the aforementioned drawbacks, including the introduction of passivation layers, 10,11 secondary annealing, 12 deposition of co-catalysts, 13–15 etc. In addition to these, the spatial distribution of the Fe and O elements has been proved to play important roles in the semiconductor bulk charge transport and surface water oxidation properties, and hence the PEC performances.…”