کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6604234 | 1424092 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Alginate derived Co3O4/Co nanoparticles decorated in N-doped porous carbon as an efficient bifunctional catalyst for oxygen evolution and reduction reactions
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
Fabricating high-performance and low-cost bifunctional electrocatalysts for both oxygen evolution and reduction reactions is vital for the practical application of renewable energy conversion. Herein, a hybrid of Co3O4/Co active species incorporated in N-doped porous carbon matrix, denoted as Co3O4/Co-NPC, has been prepared using a scalable and facile method involving the carbonization of alginate composite after a Co ion exchange with sustainable seaweed biomass. The 3D Co3O4/Co-NPC exhibits good bifunctional oxygen electrocatalytic performance in alkaline medium. The proposed catalyst gives the smaller onset potential (1.450â¯V vs. RHE) and overpotential (277â¯mV) at 10â¯mAâ¯cmâ2 current density, indicating a superior oxygen evolution reaction activity to commercial IrO2 catalyst. It also performs the excellent oxygen reduction catalytic activity with larger onset potential (0.91â¯V vs. RHE), more positive half wave potential (0.806â¯V vs. RHE) and bigger diffusion-limiting current density (â5.86â¯mAâ¯cmâ2 at 0.4â¯V). The Co3O4/Co-NPC hybrid experiences an almost ideal 4e process with better long-term stability and anti-methanol ability than commercial Pt/C catalyst in 0.1â¯M KOH. The prominent bifunctional activity of Co3O4/Co-NPC can be due to the synergistic effects of the well dispersed Co3O4/Co active species and N-doped porous carbon nanostructure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 265, 1 March 2018, Pages 681-689
Journal: Electrochimica Acta - Volume 265, 1 March 2018, Pages 681-689
نویسندگان
Tianrong Zhan, Sisi Lu, Xiaolin Liu, Hongni Teng, Wanguo Hou,