التفاصيل البيبلوغرافية
| العنوان: |
Pr-Doped LaCoO 3 toward Stable and Efficient Oxygen Evolution Reaction |
| المؤلفون: |
Renjie Xie (9229762), Zhiwei Nie (9229768), Xiangchen Hu (9229765), Yi Yu (28902), Carmela Aruta (1624117), Nan Yang (305078) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Medicine, Microbiology, Physiology, Biotechnology, Evolutionary Biology, Developmental Biology, Chemical Sciences not elsewhere classified, Information Systems not elsewhere classified, term tests compared, oxygen evolution reaction, energy conversion devices, electronic occupation regulation, electron transfer process, electron occupation close, co 3d bands, 6 , 4 , 341 mv ), 3 , 2 , enhanced oer activity, 5 , inexpensive oer electrocatalysts, oer activity, >, >< sub, x <, 371 mv |
| الوصف: |
Developing inexpensive, efficient, and stable electrocatalysts for oxygen evolution reaction (OER) is crucial in energy conversion devices. The high cost and insufficient stability of the state-of-the-art IrO 2 electrocatalysts for OER have restricted their widespread applications. In this work, La 1– x Pr x CoO 3 perovskites with different Pr doping concentrations ( x = 0, 0.25, 0.5, 0.75, 1) were investigated as alternative and inexpensive OER electrocatalysts. The OER activity was observed to increase with Pr doping and was maximum at the 50 mol % doping concentration. The overpotential of La 0.5 Pr 0.5 CoO 3 was reduced to 312 mV at 10 mA·cm –2 , which was significantly smaller than 371 mV of LCO and even superior to that of the commercial IrO 2 catalysts (341 mV). Furthermore, La 0.5 Pr 0.5 CoO 3 showed more stable performance in long-term tests compared with Pr 0.5 Ba 0.5 CoO 3 and La 0.6 Sr 0.4 CoO 3 . X-ray diffraction analysis showed phase transition from a rhombohedral to an orthorhombic structure with Pr doping. Based on X-ray photoelectron spectrum analysis, the enhanced OER activity of La 0.5 Pr 0.5 CoO 3 was correlated to electron occupation close to the Fermi level and the hybridization of O 2p and Co 3d bands, which facilitated the electron transfer process of the OER. Our work is therefore expected to provide a facile method of designing high-performance and stable OER perovskite catalysts through an approach based on electronic occupation regulation. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| العلاقة: |
https://figshare.com/articles/journal_contribution/Pr-Doped_LaCoO_sub_3_sub_toward_Stable_and_Efficient_Oxygen_Evolution_Reaction/16547842Test |
| DOI: |
10.1021/acsaem.1c01348.s001 |
| الإتاحة: |
https://doi.org/10.1021/acsaem.1c01348.s001Test |
| حقوق: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.732B4D26 |
| قاعدة البيانات: |
BASE |
