PrFeO₃ Photocathodes Prepared Through Spray Pyrolysis

Abstract

Perovskite oxides are receiving wide interest for photocatalytic and photoelectrochemical devices, owing to their suitable band gaps for solar light absorption and stability in aqueous applications. Herein, we assess the activity of PrFeO3 photocathodes prepared by using spray pyrolysis and calcination temperatures between 500 and 700 °C. Scanning electron microscopy shows corrugated films of high surface coverage on the conductive glass substrate. The electrochemically active surface area shows slight decreases with temperature increases from 500 to 600 and 700 °C. However, transient photocurrent responses and impedance spectroscopy data showed that films calcined at higher temperatures reduced the probabilities of recombination due to trap states, resulting in faster rates of charge extraction. In this trade‐off, a calcination temperature of 600 °C provided a maximum photocurrent of ‐130±4 μA cm−2 at +0.43 VRHE under simulated sunlight, with an incident photon‐to‐current conversion efficiency of 6.6 % at +0.61 VRHE and 350 nm and an onset potential of +1.4 VRHE for cathodic photocurrent.

Efficient photoselectrochemical hydrogen production utilizing of APbI 3 (A = Na, Cs, and Li) perovskites nanorods

“…Finally, in Table 2, the obtained values of J ph and IPCE are summarized with the previously stated values using different photoelectrode perovskites. As shown in this table, the values obtained for J ph and IPCE in this work are higher than those obtained from several previously recorded photoelectrodes based on perovskites.. [51][52][53][54] F I G U R E 6 A, Absorbance spectra and, B, band gap for CsPbI 3, NaPbI 3 , and LiPbI 3 perovskites [Colour figure can be viewed at wileyonlinelibrary.com] F I G U R E 7 A, The photoelectrochemical J ph -V behaviors in dark and under light illumination for all samples, and, B, the value of IPCE efficiency for NaPbI 3 photoelectrode [Colour figure can be viewed at wileyonlinelibrary.com]…”

“…As shown in this table, the values obtained for J ph and IPCE in this work are higher than those obtained from several previously recorded photoelectrodes based on perovskites. 51‐54 …”

Promoting Active Electronic States in LaFeO3 Thin-Films Photocathodes via Alkaline-Earth Metal Substitution

“…TiO2) onto semiconductor surfaces and metal doping have extended their lifetime under operational conditions. 10,[12][13][14] On the other hand, ferrite materials including LaFeO3, [15][16][17] YFeO3, 18 BiFeO3, 19 PrFeO3, 20 CuFeO2, 21 and CaFe2O4 22 are chemically stable, but their EQE values are significantly lower. LaFeO3 (LFO) is a p-type semiconductor exhibiting high photovoltages towards the HER, but low EQE values, regardless of the synthesis methods.…”

Nanoporous TiN/TiO2/Alumina Membrane for Photoelectrochemical Hydrogen Production from Sewage Water

“…The IPCE value results from the effect of the photocatalytic property of the electrode for sewage water splitting without adding an external electrolyte. Therefore, the electrode works for converting the sewage water to H 2 and O 2 with higher efficiency than that reported by other previous studies [ 28 , 46 , 47 , 48 , 49 , 50 ].…”

“…For comparison, the performance indicators, J ph and IPCE, of the prepared electrodes are displayed in Table 1 relative to some previously reported electrodes for the water-splitting reaction to evaluate O 2 and H 2 [ 28 , 46 , 47 , 50 , 63 , 64 ]. In addition to the low cost and high controllability of the prepared nanomaterials, our prepared photoelectrode has relatively high IPCE and J ph values comparative to the previously reported photoelectrodes in Table 1 .…”