Hatted 1T/2H-Phase MoS2 on Ni3 S2 Nanorods for Efficient Overall Water Splitting in Alkaline Media.
Chemistry
; 26(9): 2034-2040, 2020 Feb 11.
Article
em En
| MEDLINE
| ID: mdl-31696569
ABSTRACT
A new hatted 1T/2H-phase MoS2 on Ni3 S2 nanorods, as a bifunctional electrocatalyst for overall water splitting in alkaline media, is prepared through a simple one-pot hydrothermal synthesis. The hat-rod structure is composed mainly of Ni3 S2 , with 1T/2H-MoS2 adhered to the top of the growth. Aqueous ammonia plays an important role in forming the 1T-phase MoS2 by twisting the 2H-phase transition and expanding the interlayer spacing through the intercalation of NH3 /NH4 + . Owing to the special "hat-like" structure, the electrons conduct easily from Ni foam along Ni3 S2 to MoS2 , and the catalyst particles maintain sufficient contact with the electrolyte, with gaseous molecules produced by water splitting easily removed from the surface of the catalyst. Thus, the electrocatalytic performance is enhanced, with an overpotential of 73â
mV, a Tafel slope of 79â
mV dec-1 , and excellent stability, and the OER demonstrates an overpotential of 190â
mV and Tafel slope of 166â
mV dec-1 .
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2020
Tipo de documento:
Article