Enhancement of Catalytic Activity and Stability of La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> Perovskite with ppm Concentration of Fe in the Electrolyte for the Oxygen Evolution Reaction
The catalytic activity and stability of an iron-nickel based oxygen-deficient perovskite for the oxygen evolution reaction (OER) are drastically improved with the ppm additive of Fe ions to the alkaline electrolyte. The enhancement is attributed to a 1–2 nm restructured Ni<sub>0.5</sub>F...
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/c16d394326dc432eb38953f7e34eb5dd |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | The catalytic activity and stability of an iron-nickel based oxygen-deficient perovskite for the oxygen evolution reaction (OER) are drastically improved with the ppm additive of Fe ions to the alkaline electrolyte. The enhancement is attributed to a 1–2 nm restructured Ni<sub>0.5</sub>Fe<sub>0.5</sub>O<sub>x</sub>(OH)<sub>2-x</sub> (oxy)hydroxide layer, as demonstrated with scanning transmission electron microscopy. La<sub>0.6</sub>Ca<sub>0.4</sub>Fe<sub>0.7</sub>Ni<sub>0.3</sub>O<sub>2.9</sub> shows almost a four-fold increase in OER activity after Fe addition relative to the as-prepared pristine electrolyte, which demonstrates the low Tafel slope of 44 ± 2.4 mV dec<sup>−1</sup> and the superior intrinsic activity of 706 ± 71 A g<sup>−1</sup><sub>oxide</sub> at 1.61 V vs. RHE. |
|---|