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Efficient Photoelectrochemical Water Splitting by Tailoring $MoS_{2}$/CoTe Heterojunction in a Photoelectrochemical Cell
| Content Provider | MDPI |
|---|---|
| Author | Sitara, Effat Nasir, Habib Mumtaz, Asad Ehsan, Muhammad Sohail, Manzar Iram, Sadia Bukhari, Syeda |
| Copyright Year | 2020 |
| Description | Solar energy conversion through photoelectrochemical water splitting (PEC) is an upcoming promising technique. MoS2/CoTe heterostructures were successfully prepared and utilized for PEC studies. MoS2 and CoTe were prepared by a hydrothermal method which were then ultrasonicated with wt. % ratios of 1:3, 1:1 and 3:1 to prepare MoS2/CoTe (1:3), MoS2/CoTe (1:1) and MoS2/CoTe (3:1) heterostructure, respectively. The pure materials and heterostructures were characterized by XRD, UV–vis-DRS, SEM, XPS, PL and Raman spectroscopy. Photoelectrochemical measurements were carried out by linear sweep voltammetry and electrochemical impedance spectroscopic measurements. A maximum photocurrent density of 2.791 mA/cm2 was observed for the MoS2/CoTe (1:1) heterojunction which is about 11 times higher than the pristine MoS2. This current density was obtained at an applied bias of 0.62 V vs. Ag/AgCl (1.23 V vs. RHE) under the light intensity of 100 mW/cm2 of AM 1.5G illumination. The enhanced photocurrent density may be attributed to the efficient electron–hole pair separation. The solar to hydrogen conversion efficiency was found to be 0.84% for 1:1 MoS2/CoTe, signifying the efficient formation of the p-n junction. This study offers a novel heterojunction photocatalyst, for PEC water splitting. |
| Starting Page | 2341 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano10122341 |
| Journal | Nanomaterials |
| Issue Number | 12 |
| Volume Number | 10 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-11-26 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Electrochemistry Photoelectrochemical Water Splitting Heterojunction Molybdenum Disulfide Cobalt Telluride |
| Content Type | Text |
| Resource Type | Article |
