Binary Transition Metal NiFeOx and CoFeOx Cocatalysts Boost the Photodriven Water Oxidation over Fe2TiO5 Nanoparticles. Issue 4 (25th February 2022)

• Record Type: Journal Article
• Authors: Melo, Mauricio A.; Centurion, Higor A.; Machado, Giovanna; Souza, Flavio L.; Gonçalves, Renato V.
• Is Part Of: ChemNanoMat. Volume 8:Issue 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-25
• Subjects: Solar Water Splitting -- Pseudobrookite -- NiFeOx -- CoFeOx -- Photocatalysis; Nanochemistry -- Periodicals; Nanostructured materials -- Periodicals; Nanochemistry; Nanostructured materials; Periodicals; 541.2
• DOI: 10.1002/cnma.202100510
• Languages: English
• ISSNs: 2199-692X

Abstract

Abstract: Although achieving a perfect match between a cocatalyst and a photocatalyst is challenging, it is a key factor to maximize the production of solar fuels. Herein, the nanostructured binary transition metal oxides NiFeOx and CoFeOx, loaded through magnetron sputtering deposition, were employed as cocatalysts for Fe2 TiO5 nanoparticles, applied to the oxygen production from solar water splitting. After the coverage of Fe2 TiO5 with exceptionally small CoFeOx and NiFeOx nanoparticles, the O2 evolution boosted from 7.0 (pure Fe2 TiO5 ) to 56.0 and 63.0 μmol, respectively, under visible light irradiation. To the best of our knowledge, these performance enhancements are the highest reported for the particulate Fe2 TiO5 photocatalyst, so far. The improvements result from the alleviation of charge transfer resistance at the solid/liquid interface, as the binary metal oxides aid the charge carriers separation at the heterojunctions and improve the kinetics of the water oxidation reaction. Abstract : Loading ultrasmall nanoparticles of the binary transition metal CoFeOx and NiFeOx cocatalysts onto the surfaces of Fe2 TiO5 nanoparticles improves the photodriven oxygen evolution through solar water splitting by 8 and 9 times, respectively, under visible light, due to the enhanced charge transfer and water oxidation kinetics improvement at the solid/liquid interface.