کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6604674 | 1424097 | 2018 | 41 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Three-dimensional well-mixed / highly-densed NiS-CoS nanorod arrays: An efficient and stable bifunctional electrocatalyst for hydrogen and oxygen evolution reactions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An efficient self-supported 3D structured catalyst is developed by combining simple electro-deposition and hydrothermal route for hydrogen and oxygen evolution reactions (HER and OER). The as-obtained Ni/Co-S electrodes show exceptional HER performance with excellent durability in both acidic and alkaline solutions, acquiring a hydrogen evolving current density of 10Â mAÂ cmâ2 at overpotentials of merely 85Â mV and 102Â mV in 0.5Â MÂ H2SO4 and 1.0Â M KOH, respectively. For the OER, the as-designed electrocatalyst can afford an oxygen evolving current density of 10Â mAÂ cmâ2 at an overpotential as low as 170Â mV in 1.0Â M KOH solution. Furthermore, an alkaline water splitting electrolyzer constructed with two pieces of Ni/Co-S electrodes can deliver a full water splitting current density of 10Â mAÂ cmâ2 at a voltage of 1.47Â V. Moreover, a Faradic efficiency close to 100% is obtained. The as-revealed simple design, easiness to large-scale preparation and superior electrocatalytic performance enable the bifunctional Ni/Co-S act as promising electrode materials for overall water splitting.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 260, 10 January 2018, Pages 82-91
Journal: Electrochimica Acta - Volume 260, 10 January 2018, Pages 82-91
نویسندگان
Zizai Ma, Qiang Zhao, Jinping Li, Bin Tang, Zhonghua Zhang, Xiaoguang Wang,