Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/117480
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | S, N co-doped carbon nanotube-encapsulated core-shelled CoS2@Co nanoparticles: efficient and stable bifunctional catalysts for overall water splitting |
Author: | Wang, J.Y. Ouyang, T. Li, N. Ma, T. Liu, Z.Q. |
Citation: | Science Bulletin, 2018; 63(17):1130-1140 |
Publisher: | Science Press |
Issue Date: | 2018 |
ISSN: | 2095-9273 2095-9281 |
Statement of Responsibility: | Jing-Yu Wang, Ting Ouyang, Nan Li, Tianyi Ma, Zhao-Qing Liu |
Abstract: | Hydrogen, serving as a clean, sustainable energy source, may be mainly produced from electrolysis water. Herein, we report cobalt disulphide encapsulated in self-catalyzed carbon nanotubes (S, N-CNTs/CoS2@Co) serving as a bifunctional catalyst, which exhibits excellent hydrogen evolution reaction performance (10.0 mA cm−2 at 0.112 V, and low Tafel slope for 104.9 mV dec−1) and oxygen evolution reaction performance (10.0 mA cm−2 at 1.57 V, and low Tafel slope for 76.1 mV dec−1), meanwhile with a strong stability at various current densities. In-depth study reveals that the excellent catalytic properties can be mainly attributed to the increased catalytic sites induced by S, N co-doping, the improved electronic conductivity derived from the carbon nanotubes, and Mott-Schottky effect between the metal cobalt and semiconductive cobalt disulfide. Notably, when the bifunctional catalysts are applied to overall water splitting, a low potential of 1.633 V at the current density of 10.0 mA cm−2 is achieved, which can compete with the precious metal catalyst benchmarks in alkaline media, demonstrating its promising practicability in the realistic water splitting application. This work elucidates a practicable way to the design of transition metal and nano-carbon composite catalysts for a broad application in the fields of energy chemistry. |
Keywords: | Core-shell structure; hydrogen evolution; oxygen evolution; bifunctional catalyst; overall water splitting |
Rights: | © 2018 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved. |
DOI: | 10.1016/j.scib.2018.07.008 |
Grant ID: | http://purl.org/au-research/grants/arc/DE150101306 http://purl.org/au-research/grants/arc/LP160100927 |
Published version: | http://dx.doi.org/10.1016/j.scib.2018.07.008 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.