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| Título: | Mn3O4@CoMn2O4-CoxOy nanoparticles: partial cation exchange synthesis and electrocatalytic properties toward the oxygen reduction and evolution reactions |
Autor: | Luo, ZhiShan; Ibáñez, María; Nafria, Raquel; Martí-Sànchez, Sara CSIC ORCID; Genç, Aziz CSIC ORCID; Mata, Maria de la CSIC ORCID; Arbiol, Jordi CSIC ORCID CVN; Morante, Joan Ramón CSIC ORCID; Cabot, Andreu | Palabras clave: | ORR Manganese oxide Nanoparticles OER Cation exchange Cobalt oxides Colloidal Electrocatalysis |
Fecha de publicación: | 2016 | Editor: | American Chemical Society | Citación: | ACS Applied Materials and Interfaces 8(27): 17435-17444 (2016) | Resumen: | MnO@CoMnO nanoparticles (NPs) were produced at low temperature and ambient atmosphere using a one-pot two-step synthesis protocol involving the cation exchange of Mn by Co in preformed MnO NPs. Selecting the proper cobalt precursor, the nucleation of CoO crystallites at the MnO@CoMnO surface could be simultaneously promoted to form MnO@CoMnO-CoO NPs. Such heterostructured NPs were investigated for oxygen reduction and evolution reactions (ORR, OER) in alkaline solution. MnO@CoMnO-CoO NPs with [Co]/[Mn] = 1 showed low overpotentials of 0.31 V at -3 mA·cm and a small Tafel slope of 52 mV·dec for ORR, and overpotentials of 0.31 V at 10 mA·cm and a Tafel slope of 81 mV·dec for OER, thus outperforming commercial Pt-, IrO-based and previously reported transition metal oxides. This cation-exchange-based synthesis protocol opens up a new approach to design novel heterostructured NPs as efficient nonprecious metal bifunctional oxygen catalysts. | Descripción: | et al. | Versión del editor: | https://doi.org/10.1021/acsami.6b02786 | URI: | http://hdl.handle.net/10261/159723 | DOI: | 10.1021/acsami.6b02786 | Identificadores: | doi: 10.1021/acsami.6b02786 e-issn: 1944-8252 issn: 1944-8244 |
| Aparece en las colecciones: | (CIN2) Artículos |
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| Mn3O4.pdf | 970,84 kB | Adobe PDF |  Visualizar/Abrir |
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