Date | 11th, Sep 2018 |
---|
Home > Press > S, N co-doped carbon nanotube-encapsulated CoS2@Co: Efficient and stable catalysts for water splitting
Abstract: Electrochemical water splitting is favorable strategy to produce high-purity H2. The current mainstream catalysts for water electrolysis are precious metals (Pt, RuO2, IrO2), which possess superior catalytic activity, relatively low over-potential and favorable catalytic kinetics, but their high cost and poor cycle stability is still unaffordable. Therefore, it is urgent to develop a new type of hydrogen production catalyst with low cost, high catalytic activity and high stability.
Beijing, China | Posted on September 10th, 2018
Due to its low cost, high abundance, and good electrical conductivity, the transition metal-Co and its derivatives have shown great promise in electrocatalysis. However, stability has been a big issue due to their high chemical activities. To address this issue, encapsulation of Co nanoparticles into carbon shell has been proposed as an effective strategy to inherit the high electrocatalytic activity of the transition metal, and further prevent its corrosion from the harsh electrolytic environment. By tuning the metal composition and structure of carbon layers, the catalytic properties of these composites can be regulated.
Recently, Liu Zhao-Qing's group of Guangzhou University reports a bifunctional catalyst, transition metal cobalt ions induced the self-growth of nitrogen doped carbon nanotubes, which are further vulcanized to incorporate sulfur into the carbon nanotubes framework. The obtained materials (S, exhibit excellent HER and OER performance. As cathode and anode, S, can rapidly dissociate water molecules to produce hydrogen and oxygen gases, requiring only 1.633 V to reach a current density of 10 mA cm-2, and a strong stability under various operating currents is also observed.
####
For more information, please click here
Contacts:Zhao-Qing Liu
Copyright © Science China Press
If you have a comment, please Contact us.
Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
News and information
Scientists unravel 'Hall effect' mystery in search for next generation memory storage devices August 19th, 2022
Researchers design new inks for 3D-printable wearable bioelectronics: Potential uses include printing electronic tattoos for medical tracking applications August 19th, 2022
Nanotubes/Buckyballs/Fullerenes/Nanorods
Buckyballs on gold are less exotic than graphene July 22nd, 2022
Strain-sensing smart skin ready to deploy: Nanotube-embedded coating detects threats from wear and tear in large structures July 15th, 2022
Boron nitride nanotube fibers get real: Rice lab creates first heat-tolerant, stable fibers from wet-spinning process June 24th, 2022
Nanotubes: a promising solution for advanced rubber cables with 60% less conductive filler June 1st, 2022
Discoveries
Scientists unravel 'Hall effect' mystery in search for next generation memory storage devices August 19th, 2022
Researchers design new inks for 3D-printable wearable bioelectronics: Potential uses include printing electronic tattoos for medical tracking applications August 19th, 2022
Visualizing nanoscale structures in real time: Open-source software enables researchers to see materials in 3D while they're still on the electron microscope August 19th, 2022
Announcements
Scientists unravel 'Hall effect' mystery in search for next generation memory storage devices August 19th, 2022
Researchers design new inks for 3D-printable wearable bioelectronics: Potential uses include printing electronic tattoos for medical tracking applications August 19th, 2022
Visualizing nanoscale structures in real time: Open-source software enables researchers to see materials in 3D while they're still on the electron microscope August 19th, 2022
Energy
Generating power where seawater and river water meet July 22nd, 2022
A novel graphene based NiSe2 nanocrystalline array for efficient hydrogen evolution reaction July 15th, 2022
Water
Scientists offer solutions for risky tap water June 17th, 2022
UBCO researchers change the game when it comes to activity tracking: Flexible, highly sensitive motion device created by extrusion printing June 17th, 2022
Organic water splitters get a boost June 10th, 2022