کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11016676 | 1774266 | 2019 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
N-doped carbon-wrapped MoxC heterophase sheets for high-efficiency electrochemical hydrogen production
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
Advancement of non-precious-metal catalysts for hydrogen evolution reactions (HER) with both prominent activity and excellent stability has been becoming an ongoing challenge in the following decades. Herein, N-doped carbon-wrapped molybdenum carbide heterophase (γ-MoC and β-Mo2C) sheets (N-MoxC@C HSs) were prepared by a facile chemical vapor reduction (CVR) procedure and following calcination at desired temperatures. The best HER electrocatalytic activity of N-MoxC@C HSs was detailedly examined in 0.5â¯M H2SO4, which exhibited a small overpotential of 172â¯mV (10â¯mAâ¯cmâ2) with a Tafel slope of only 60â¯mVâ¯decâ1 and durability. The improved HER activities and catalytic stability were due to heterocrystal MoxC, nitrogen doping, and carbon coating. Particularly, this study effectively combined the respective advantages of both γ-MoC and β-Mo2C via the interface effect and matched polarity of hydrogen adsorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 358, 15 February 2019, Pages 362-368
Journal: Chemical Engineering Journal - Volume 358, 15 February 2019, Pages 362-368
نویسندگان
Tanli Xiong, Jin Jia, Zhaoqian Wei, Lili Zeng, Yunqie Deng, Weijia Zhou, Shaowei Chen,