کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6604181 | 1424092 | 2018 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tuning active sites on cobalt/nitrogen doped graphene for electrocatalytic hydrogen and oxygen evolution
ترجمه فارسی عنوان
تنظیم سایت های فعال بر گرافن دی اکسید کبالت / نیتروژن برای تکامل الکتروکاتالیزوری هیدروژن و اکسیژن
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Atomically dispersed metals and their environments strongly influence their electrocatalytic activities. In this work, we synthesized a series of cobalt/nitrogen doped graphene (Co-NG) catalysts. Cobalt atom dispersion and aggregation on NG's basal plane, bond states of cobalt and nitrogen along with graphene basal plane defect and their impacts on hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities and kinetics were intensively studied. We found that a geometrically controlled formation of active CoN and CoC sites in the NG's basal plane is the key issue for improving interfacial Faradic reaction kinetics and thus enhancing hydrogen evolution. Differently, chemical bonding of finely dispersed cobalt atoms with oxygen, nitrogen and carbon together improves interfacial water oxidation kinetics for achieving high OER activity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 265, 1 March 2018, Pages 497-506
Journal: Electrochimica Acta - Volume 265, 1 March 2018, Pages 497-506
نویسندگان
Yijie Zhang, Wanfei Li, Luhua Lu, Weiguo Song, Chunru Wang, Lisha Zhou, Jinghai Liu, Ying Chen, Hongyun Jin, Yuegang Zhang,