کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5347988 | 1503559 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A straight forward approach to electrodeposit tungsten disulfide/poly(3,4-ethylenedioxythiophene) composites onto nanoporous gold for the hydrogen evolution reaction
ترجمه فارسی عنوان
یک رویکرد مستقیم به کامپوزیت های تنگستن دی سولفید / پلی (3،4-اتیلن دی سکتیوفن) الکترود بر روی طلا نانوپور برای واکنش تکامل هیدروژن
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
طلا نانوپور، دی فلوید تنگستن، واکنش تکامل هیدروژن، الکترو کاتالیزورها،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
1.1Â nm tungsten disulfide/poly(3,4-ethylenedioxythiophene) (PEDOT) was successfully electrodeposited on the surface of dealloyed nanoporous gold (NPG) surface to form uniform nanocomposites and offers an excellent electrocatalysis for the electrochemical dihydrogen evolution reaction (HER) in acidic media. The approach is straight forward and does not require any expensive equipment or intensive energy. The morphology and composition of the nanocomposites were structurally mapped by high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectrometry (FTIR). The roles of both the NPG substrate and PEDOT in the observed enhanced HER activity compared to planar Au-electrode surfaces and pure single-component WS2 have been deconvoluted experimentally. PEDOT itself is inert for the HER, but was found to improve significantly the conductivity and operating stability of the WS2 catalyst. The prepared nanocomposites reach the best in 2D WS2 catalyst family, exhibiting excellent electrochemical catalytic activity for the HER. The optimal electrode showed an onset potential of â164Â mV vs. reversible hydrogen electrode (RHE), an apparent exchange current density as high as 0.04Â mAÂ cmâ2, and a very low Tafel slope of 53Â mVÂ decâ1. These catalysts are promising electrocatalysts for generation a large amount of H2 from water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 410, 15 July 2017, Pages 308-314
Journal: Applied Surface Science - Volume 410, 15 July 2017, Pages 308-314
نویسندگان
Xinxin Xiao, Christian Engelbrekt, Minwei Zhang, Zheshen Li, Jens Ulstrup, Jingdong Zhang, Pengchao Si,