Effects of RhCrOx Cocatalyst Loaded on Different Metal Doped LaFeO3 Perovskites with Photocatalytic Hydrogen Performance under Visible Light Irradiation

Photocatalytic hydrogen (H2) production by water splitting provides an alternative to fossil fuels using clean and renewable energy, which gives important requirements about the efficiency of photocatalysts, co-catalysts, sacrificial agents. To achieve higher H2 efficiencies from splitting, study uses different metals such as yttrium (Y), praseodymium (Pr), magnesium (Mg), Indium (In), calcium (Ca), europium (Eu), terbium (Tb) doped lanthanum iron oxide (LaFeO3) perovskites. They were synthesized a co-precipitate method in citric acid solution, was loaded with rhodium chromium (RhCrOx) cocatalysts impregnation along detailed investigation photocatalytic evolution performance. Photoluminescence (PL) UV–Vis diffuse reflectance spectra (DRS) measured rate electron–hole recombination for RhCrOx/Pr-LaFeO3 X-ray powder diffraction (XRD), scanning electron microscope (SEM), high resolution transmission (HRTEM), photoelectron (XPS) analyzed their characteristics. The experimental results obtained show that samples 0.5 wt.% RhCrOx loading 0.1 M Pr-doped LaFeO3 calcined at temperature 700 °C (0.1Pr-LaFeO3-700) exhibited highest 127 µmol h−1 g−1, is 34% performance than undoped photocatalysts (94.8 μmol g−1). A measure 20% triethanolamine (TEOA) enabled hole capture capability promoted 0.1-Pr-LaFeO3-700 get rate.