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Nanocrystalline cerium orthoferrite (CeFeO3), synthesized via a solution combustion method, exhibits a coral-like morphology and single-phase purity. It possesses a low surface area but notable porosity, enabling low overpotentials of −176 mV (HER) and 332 mV (OER). These features indicate its potential as an electrode material for alkaline water splitting (AWS). [ABSTRACT FROM AUTHOR]

Synthesis and characterization of spherulite-like nanocrystalline titania with rutile structure (r-TiO2) are described herein. The r-TiO2 particles were synthesized via the convenient and low-cost hydrothermal treatment of TiO(C6H6O7) titanyl citrate. The r-TiO2 spherulites are micron-sized agglomerates of rod-shaped nanocrystals with characteristic sizes of 7(±2) × 43(±10) nm, oriented along (101) crystallographic direction, and separated by micropores, as revealed by SEM and TEM. PXRD and Raman spectroscopy confirmed the nanocrystalline nature of r-TiO2 crystallites. BET analysis showed a high specific surface area of 102.6 m2/g and a pore volume of 6.22 mm3/g. Photocatalytic performances of the r-TiO2 spherulites were investigated for the processes of methyl violet (MV) degradation in water and hydrogen evolution reaction (HER) in aqueous solutions of ethanol. The (MV) degradation kinetics was found to be first-order and the degradation rate coefficient is 2.38 × 10−2 min−1. The HER was performed using pure r-TiO2 spherulites and nanocomposite r-TiO2 spherulites with platinum deposited on the surface (r-TiO2/Pt). It was discovered that the r-TiO2/Pt nanocomposite has a 15-fold higher hydrogen evolution rate than pure r-TiO2; their rates are 161 and 11 nmol/min, respectively. Thus, the facile synthesis route and the high photocatalytic performances of the obtained nanomaterials make them promising for commercial use in such photocatalytic processes as organic contamination degradation and hydrogen evolution. [ABSTRACT FROM AUTHOR]

Correction for 'Novel electrode material based on coral-like cerium orthoferrite (CeFeO3) for efficient alkaline water splitting' by Anna S. Seroglazova et al., New J. Chem., 2023, 47, 20257–20261, https://doi.org/10.1039/D3NJ01898A. [ABSTRACT FROM AUTHOR]

[Display omitted] • Series of PrFeO 3 nanopowders were synthesized via the solution combustion method. • Morphology and surface area of PrFeO 3 can be controlled by solution Ox/Red ratio. • PrFeO 3 nanopowders exhibit high efficiency toward photo-Fenton degradation of MV. • Photocatalytic activity is strongly affected by the presence of amorphous phase. Praseodymium orthoferrite nanopowders were synthesized by Red/Ox-controlled glycine-nitrate combustion followed by heat treatment. It was found that the temperature of PrFeO 3 formation from amorphous combustion products varied from 612 °C to 647 °C, depending on the initial reaction solution. The purity, crystallite size, morphology and specific surface area of ​​the samples were affected by the glycine-nitrate ratio (G/N). At nonstoichiometric G/N (more or less than 0.6), amorphous or low crystalline phases were formed. Also, at these ratios, nanopowders had the smallest crystallite size before (17.4–36.2 nm) and after (45.3–49.2 nm) heat treatment. All powders were characterized by developed porous morphology with a specific surface area of ​​2.9–11.9 m2/g and a band gap of 2.07–2.13 eV. The results of 57Fe Mössbauer spectroscopy confirmed magnetically ordered state of PrFeO 3 nanocrystals with 1 mol % of amorphous component, associated with the combustion mode of a glycine-nitrate solution. The photocatalytic activity of PrFeO 3 was evaluated by the rate of decomposition of methyl violet (MV) in the presence of peroxide under the action of visible light. [ABSTRACT FROM AUTHOR]