A Novel C Doped MoS2 /CoP/MoO2 Ternary Heterostructure Nanoflower for Hydrogen Evolution Reaction at Wide pH Range and Efficient Overall Water Splitting in Alkaline Media.
Chemistry
; 29(35): e202300629, 2023 Jun 22.
Article
em En
| MEDLINE
| ID: mdl-37057571
ABSTRACT
The development of low-cost and high-efficiency bifunctional catalysts is still a challenge for hydrogen production through overall water splitting. This paper reports the in-situ synthesis of C-doped MoS2 /CoP/MoO2 using bacterial cellulose (BC) as the reducing agent and the source of C and using BC (MoS2 /Co1.2 MoO4.2 â
1.2H2 O/BC) as the template. Heterogeneous structure for hydrogen evolution reaction (HER) and alkaline water electrolysis in a wide pH range. Due to the large number of defect sites caused by C doping and the synergy between these three active components (MoS2 , CoP and MoO2 ), the HER and oxygen evolution reaction (OER) activities of the catalyst have been greatly improved. Therefore, during HER, a small initial overpotential (27â
mV) was achieved in 1.0â
M KOH. In 0.5â
M H2 SO4 , 0.1â
M PBS and 1.0â
M KOH, the current density reached 10â
mA cm-2 at overpotentials of 123.4, 150, and 139â
mV, respectively. For OER, an overpotential of 268â
mV was required to achieve 10â
mA cm-2 . The alkaline two-electrode device composed of C doped MoS2 /CoP/MoO2 delivers 10â
mA cm-2 at a low potential of 1.51â
V and can be easily driven by a single AA battery. This work provides a new design strategy of C doped ternary heterostructures for electrocatalysis and related energy applications.
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MEDLINE
Assunto principal:
Celulose
/
Molibdênio
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article