کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6602954 | 1424083 | 2018 | 48 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Anchoring perovskite LaMnO3 nanoparticles on biomassâderived N, P coâdoped porous carbon for efficient oxygen reduction
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
We propose a new perovskite/carbon composite of LaMnO3 nanoparticles anchored on N and P co-doped porous carbon as an efficient electrocatalyst for oxygen reduction reaction (ORR) in alkaline solution. A facile two-step method is applied for the synthesis of such composite, involving the pyrolysis of cheap, abundant and renewable natural okara with the formation of N and P co-doped porous carbon for the first step, and the deposition of LaMnO3 nanoparticles on the carbon surface by sol-gel synthesis at the second step. A synergistic effect is built between the LaMnO3 nanoparticles and the porous carbon substrate, resulting in obviously improved ORR activity as compared with the individual N, P co-doped carbon and the nanosized LaMnO3 electrocatalysts, in terms of onset potential, limiting current density, and stability. The LaMnO3/N, P co-doped carbon composites further evaluated as an air electrode in a Zn-air battery, demonstrating attractive performance, including high discharge voltage plateau (â¼1.2â¯V) and excellent stability with negligible degradation in voltage at 25â¯mAâ¯cmâ1 discharge current for 24â¯h. The present results highly promise the LaMnO3/biocarbon nanocomposite as a potential metal-free ORR electrocatalyst, which may find a wide use in metal-air batteries or fuel cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 274, 1 June 2018, Pages 40-48
Journal: Electrochimica Acta - Volume 274, 1 June 2018, Pages 40-48
نویسندگان
Jie Hu, Ziwei Shi, Chao Su, Benqian Lu, Zongping Shao, Hao Huang,