کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4767072 | 1424113 | 2017 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
H2O2 Treated La0.8Sr0.2CoO3-δ as an Efficient Catalyst for Oxygen Evolution Reaction
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The development of non-precious metal-based oxygen evolution reaction (OER) electrocatalysts is one of the keys to lower the cost of various renewable energy technologies including fuel cells, water electrolyzers, and metal-air batteries. Perovskite oxides are among the best catalysts for OER in alkaline solutions. In the perovskite family, La0.8Sr0.2CoO3-δ (LSC) has been reported to have OER catalytic properties dependent on the characteristics of its surface, but where its activity and stability are still not high enough for applications. In order to improve the surface catalysis of LSC, we have subjected it to multiple H2O2 treatments. After 4 treatments, lasting 6 hours each, the current density of LSC at 1.70 V (vs RHE) increased by a factor of 6.6 and concomitantly, the Tafel slope decreased from 105.5 to 76.6 mVdecâ1 compared to untreated materials. The long-term stability also improved dramatically after treatment. All these improvements are likely linked to the formation of an amorphous layer of hydrous oxide on the LSC particles during treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 244, 1 August 2017, Pages 139-145
Journal: Electrochimica Acta - Volume 244, 1 August 2017, Pages 139-145
نویسندگان
Kwunyu Lam, Yang Gao, Jian Wang, Francesco Ciucci,