Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 279, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119387
Keywords
Molybdenum disulfide; Hydrogen evolution reaction; Dual co-catalysts; Photocatalytic
Funding
- Basic Science Center Program for Ordered Energy Conversion of the National Natural Science Foundation of China [51888103]
- Fundamental Research Funds for the Central Universities [NE2019103]
- World Premier International Research Center Initiative (WPI Initiative) on Materials Nano-architectonics (MANA)
- Photoexcitonix Project in Hokkaido University
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Molybdenum disulfide (MoS2) of 1 T phase was found to potentially replace N as efficient co-catalyst for the hydrogen evolution reaction (HER). Herein, an ultrafine nano 1 T-MoS2 monolayer of around 10 nm was successfully synthesized and showed a high electrocatalytic HER activity with low overpotential of 78 mV at 10 mA cm(-2). When the 1 T-MoS2 is loaded onto P25 TiO2, its ultrafine size dramatically promotes the superior interface bonding with TiO2 and a high photocatalytic HER activity of 300.3 mu mol h(-1) is obtained. Furthermore, a strategy by introducing NiOx co-catalyst into the 1 T-MoS 2 /P25 to fabricate a dual co-catalyst composite 1 T-MoS2/P25/NiOx significantly improves the photocatalytic HER activity to 1629.1 mu mol h(-4) which is very close to Pt/P25 of 2196.8 mu mol h(-1). The close interface-bonding between the nanosized 1 T-MoS2 monolayer and P25 along with the assistance of NiOx results in the superior photocatalytic HER activity by the enhanced separation and transfer of the photogenerated electrons and holes.
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