Controllable synthesis of P-doped MoS2 nanopetals decorated N-doped hollow carbon spheres towards enhanced hydrogen evolution
Authors:
- Yan Wei,
- Xiao Zhang,
- Zhenlu Zhao,
- Hsueh-Shih Chen,
- Katarzyna Matras-Postolek,
- Bo Wang,
- Ping Yang
Abstract
In order to construct the molybdenum disulfide (MoS2) hybrid nanostructure with enhanced conductivity and more active sites towards electrocatalytic hydrogen evolution reaction (HER), hierarchical P-doped MoS2 nanopetals decorated N-doped hollow carbon spheres (N-C@P-MoS2) core-shell structures were synthesized via calcination and hydrothermal methods. N-C@P-MoS2 with optimized loadings exhibited favorable HER activities with low onset overpotential (117 mV), small Tafel slopes (68 mV/dec), and fine stability compared with pure MoS2 nanosheets and all undoped samples. This is largely ascribed to the synergy of MoS2 and carbon in the rational hierarchical structures, as well as the modified electronic structure with improved conductivity, increased active sites by virtue of N and P doping. Furthermore, P-doped MoS2 nanosheets were encapsulated in carbon spheres (N-C/P-MoS2 (inside)) by controlling the dropping rate of adding MoS2 precursors. As the active sites were hampered, the N-C/P-MoS2 (inside) revealed poor HER performance compared with the core-shell counterparts. The results demonstrate that the fabrication of hierarchical MoS2/carbon composites with the synergy of structural (morphology and content) and electronic (active sites and conductivity) effects induced by various nonmetal doping pave the way for enhanced electrocatalytic HER activities.
- Record ID
- CUT6fa5a8fb020240c4a00f75f770f0b2ec
- Publication categories
- ;
- Author
- Journal series
- Electrochimica Acta, ISSN 0013-4686, e-ISSN 1873-3859
- Issue year
- 2019
- Vol
- 297
- Pages
- 553-563
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 562-563; Bibliografia (liczba pozycji) - 44; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 297
- Keywords in English
- molybdenum disulfide, hollow carbon sphere, nonmetal doping, hydrogen evolution reaction, structural and electronic effect
- DOI
- DOI:10.1016/j.electacta.2018.12.019 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0013468618327178 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 100
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT6fa5a8fb020240c4a00f75f770f0b2ec/
- URN
urn:pkr-prod:CUT6fa5a8fb020240c4a00f75f770f0b2ec
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.