Design of Ti-Pt Co-doped α-Fe2O3 photoanodes for enhanced performance of photoelectrochemical water splitting

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 h 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 modication strategies reported in the literature (Table S3 †), 15,22,24,25,[27][28][29][30][74][75][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.…”

Rational Design of CoOOH/α-Fe2O3/SnO2 for Boosted Photoelectrochemical Water Oxidation: The Roles of Underneath SnO2 and Surface CoOOH

“…Nevertheless, the PEC OER activity of α-Fe 2 O 3 is still limited by several intrinsic defects, like poor conductivity, short minority carrier lifetime, and poor surface OER kinetics . To address these problems, various strategies, including morphology control, heterojunction construction, bulk element doping, and oxygen evolution catalyst (OEC) loading, have been developed to improve the PEC water splitting of α-Fe 2 O 3 . − As OER takes place at surface of α-Fe 2 O 3 , OEC loading is regarded as an effective route. OEC not only plays important roles that traps and stores photogenerated holes but also acts as catalytic active sites for the OER.…”

Dual modification on hematite to minimize small polaron effects and charge recombination for sustainable solar water splitting

“…14 Dual modication of oxides has been reported focusing on the synergistic inuence of ions with mixed valence states. [15][16][17][18][19][20][21][22][23][24][25][26] However, the PPS synthesis strategy can be used to specically favor dopant solid-solution or dopant interfacial segregation by manipulating the chemistry of a polymeric solution. In summary, the process entails the synthesis of a hematite polymeric precursor containing Fe 3+ ions mixed with the ion designed to form a thermodynamic solid solution.…”