期刊
DALTON TRANSACTIONS
卷 51, 期 26, 页码 10272-10278出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2dt01630c
关键词
-
资金
- Department of Atomic Energy of the Government of India
- Science and Engineering Research Board
- UGC
- National Institute of Science Education and Research
- Department of Science and Technology [CRG/2021/006499]
Metal-organic framework-derived transition metal sulfides, such as cobalt sulfide, have been recognized as reliable and cost-effective alternative electrocatalysts for hydrogen evolution reactions. This study successfully synthesized cobalt sulfide with unique morphology through a one-step solvothermal sulfurization process. The resulting cobalt sulfide showed faster reaction kinetics and excellent stability during water electrolysis, making it a promising electrocatalyst for renewable energy production.
Metal-organic framework (MOF)-derived transition metal sulfides are viewed as reliable, cost-effective, and alternative hydrogen evolution reaction (HER)-efficient electrocatalysts. They have been used to replace platinum (and their alloys) for production of renewable energy carriers such as hydrogen. Progress towards development of non-precious transition-metal sulfides through different synthetic routes to obtain unique morphological nanostructures with enhanced HER activity is challenging. We introduced a transition-metal sulfide, cobalt sulfide (CoS1.097), derived from a cobalt MOF [Co-BPY-DDE] by following facile, one-step solvothermal sulfurization. By varying the sulfurization temperature (from 140 degrees C to 180 degrees C) during the solvothermal method, three cobalt-sulfide products were obtained: CoS1.097-140, CoS1.097-160, and CoS1.097-180, respectively. Temperature variation had a vital role in optimizing the HER activity of the electrocatalyst. Besides, notable plate-shaped cobalt sulfide nanoparticles (CoS1.097-160) required overpotential of 163 mV to deliver a current density of 10 mA cm(-2) with a low Tafel slope of 53 mV dec(-1), thereby demonstrating faster reaction kinetics during the evolution of molecular hydrogen. Furthermore, 25 h of long-term stability of the electrocatalyst reflected its practical applicability in acidic media. CoS1.097-160 had uniform plate-shaped morphology and large electrochemical active surface area, which contributed to enhanced electrochemical performance through water electrolysis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据