Boosting photocatalytic overall water splitting by Co doping into Mn3O4 nanoparticles as oxygen evolution cocatalysts
| Autor: | Yongbo Kuang, Anke Xiong, Masaki Saruyama, Masanori Sakamoto, Seiji Akiyama, Taizo Yoshinaga, Toshiharu Teranishi, Takashi Hisatomi, Kazunari Domen, Yeilin Ham, Ryo Niishiro |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Doping Spinel Oxygen evolution Nanoparticle chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Chemical engineering chemistry law engineering Photocatalysis Water splitting General Materials Science Calcination 0210 nano-technology Cobalt |
| Zdroj: | Nanoscale. 10:10420-10427 |
| ISSN: | 2040-3372 2040-3364 |
| Popis: | The effect of cobalt doping into a manganese oxide (tetragonal spinel Mn3O4) nanoparticle cocatalyst up to Co/(Co + Mn) = 0.4 (mol/mol) on the activity of photocatalytic water oxidation was studied. Monodisperse ∼10 nm CoyMn1−yO (0 ≤ y ≤ 0.4) nanoparticles were uniformly loaded onto photocatalysts and converted to CoxMn3−xO4 nanoparticles through calcination. 40 mol% cobalt-doped Mn3O4 nanoparticle-loaded Rh@Cr2O3/SrTiO3 photocatalyst exhibited 1.8 times-higher overall water splitting activity than that with pure Mn3O4 nanoparticles. Investigation on the band structure and electrocatalytic water oxidation activity of CoxMn3−xO4 nanoparticles revealed that the Co doping mainly contributes to the improvement of water oxidation kinetics on the surface of the cocatalyst nanoparticles. |
| Databáze: | OpenAIRE |
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