Structural effects of LaNiO^sub 3^ as electrocatalyst for the oxygen reduction reaction
LaNiO3 perovskite is a promising electrocatalyst for the oxygen reduction reaction (ORR). In this work we study the effects of several key structural and morphological features on the performance of LaNiO3 perovskites for the ORR. We have prepared a series of LaNiO3 oxides via soft chemistry and cal...
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| Veröffentlicht in: | Applied catalysis. B, Environmental Environmental, 2017-04, Vol.203, p.363 |
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| creator | Retuerto, María Pereira, Amaru González Pérez-Alonso, Francisco J Peña, Miguel A Fierro, José Luis G Alonso, José Antonio Fernández-Díaz, María Teresa Pascual, Laura Rojas, Sergio |
| description | LaNiO3 perovskite is a promising electrocatalyst for the oxygen reduction reaction (ORR). In this work we study the effects of several key structural and morphological features on the performance of LaNiO3 perovskites for the ORR. We have prepared a series of LaNiO3 oxides via soft chemistry and calcined the final materials at different temperatures from 500 to 1000 °C. With the aim of obtaining morphological and structural information relevant to their performance the prepared oxides have been thoroughly characterized by BET, Power Neutron Diffraction (PND), XRD, HRTEM, STEM-HAADF and XPS. We have analysed the effect of extrinsic (surface area and particle size) and intrinsic factors (formation of oxygen vacancies, Ni oxidation states and occupancy of the eg levels) on the current densities and specific activity, respectively, of several samples of LaNiO3. The catalysts with higher catalytic activity are those in which the perovskite structure is properly formed, but display high surface areas. |
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In this work we study the effects of several key structural and morphological features on the performance of LaNiO3 perovskites for the ORR. We have prepared a series of LaNiO3 oxides via soft chemistry and calcined the final materials at different temperatures from 500 to 1000 °C. With the aim of obtaining morphological and structural information relevant to their performance the prepared oxides have been thoroughly characterized by BET, Power Neutron Diffraction (PND), XRD, HRTEM, STEM-HAADF and XPS. We have analysed the effect of extrinsic (surface area and particle size) and intrinsic factors (formation of oxygen vacancies, Ni oxidation states and occupancy of the eg levels) on the current densities and specific activity, respectively, of several samples of LaNiO3. 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B, Environmental</title><description>LaNiO3 perovskite is a promising electrocatalyst for the oxygen reduction reaction (ORR). In this work we study the effects of several key structural and morphological features on the performance of LaNiO3 perovskites for the ORR. We have prepared a series of LaNiO3 oxides via soft chemistry and calcined the final materials at different temperatures from 500 to 1000 °C. With the aim of obtaining morphological and structural information relevant to their performance the prepared oxides have been thoroughly characterized by BET, Power Neutron Diffraction (PND), XRD, HRTEM, STEM-HAADF and XPS. We have analysed the effect of extrinsic (surface area and particle size) and intrinsic factors (formation of oxygen vacancies, Ni oxidation states and occupancy of the eg levels) on the current densities and specific activity, respectively, of several samples of LaNiO3. 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In this work we study the effects of several key structural and morphological features on the performance of LaNiO3 perovskites for the ORR. We have prepared a series of LaNiO3 oxides via soft chemistry and calcined the final materials at different temperatures from 500 to 1000 °C. With the aim of obtaining morphological and structural information relevant to their performance the prepared oxides have been thoroughly characterized by BET, Power Neutron Diffraction (PND), XRD, HRTEM, STEM-HAADF and XPS. We have analysed the effect of extrinsic (surface area and particle size) and intrinsic factors (formation of oxygen vacancies, Ni oxidation states and occupancy of the eg levels) on the current densities and specific activity, respectively, of several samples of LaNiO3. The catalysts with higher catalytic activity are those in which the perovskite structure is properly formed, but display high surface areas.</abstract><cop>Amsterdam</cop><pub>Elsevier BV</pub></addata></record> |
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| ispartof | Applied catalysis. B, Environmental, 2017-04, Vol.203, p.363 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Catalysis Catalysts Catalytic activity Diffraction Lattice vacancies Neutron diffraction Oxidation Oxides Oxygen Oxygen reduction reactions Particle size Perovskite Perovskite structure Perovskites X ray photoelectron spectroscopy |
| title | Structural effects of LaNiO^sub 3^ as electrocatalyst for the oxygen reduction reaction |
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