التفاصيل البيبلوغرافية
| العنوان: |
Doping of MoS 2 by “Cu” and “V”: An Efficient Strategy for the Enhancement of Hydrogen Evolution Activity |
| المؤلفون: |
Mamta Devi Sharma (6613208), Chavi Mahala (3856858), Brindaban Modak (1509097), Surojit Pande (1542829), Mrinmoyee Basu (1268493) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Microbiology, Cell Biology, Neuroscience, Physiology, Biotechnology, Sociology, Cancer, Inorganic Chemistry, Mental Health, Infectious Diseases, Computational Biology, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, Information Systems not elsewhere classified, V-MoS 2, Cu-MoS 2, conduction band minima, Hydrogen Evolution Activity, RHE, MoS 2, Cu-doped MoS 2, HER, DFT, electrocatalytic hydrogen evolution., surface area increases, band energy position, TS, valance band maxima |
| الوصف: |
To replace Pt-based compounds in the electrocatalytic hydrogen evolution reaction (HER), MoS 2 has already been established as an efficient catalyst. The electrocatalytic activity of MoS 2 is further improved by tuning the morphology and the electronic structure through doping, which helps the band energy position to be modified. Presently, thin sheets of MoS 2 (MoS 2 -TSs) are synthesized via a microwave technique. Thin sheets of MoS 2 can outperform nanosheets of MoS 2 in the HER. Further, the efficiency of the thin sheets is improved by doping with different metals like Cu, V, Zn, Mn, Fe, Sn, etc. “Cu”- and “V”-doped MoS 2 -TSs are highly efficient for the HER. At a fixed potential of −0.588 V vs RHE, Cu-doped MoS 2 (Cu-MoS 2 -TS), V-doped MoS 2 (V-MoS 2 -TS), and MoS 2 -TS can generate current densities of 327.46, 308.45, and 127.82 mA/cm 2 , respectively. The electrochemically active surface area increases nearly 7.7-fold and 2.5-fold for Cu-MoS 2 -TS and V-MoS 2 -TS than for MoS 2 -TS, respectively. Cu-MoS 2 -TS shows exceptionally high electrocatalytic stability up to 140 h in an acidic medium (0.5 M H 2 SO 4 ). First-principles calculations using density functional theory (DFT) are performed, which are well matched with the experimental observations. DFT calculations dictate that after doping with “V” and “Cu” both valance band maxima and conduction band minima are uplifted, which indicates the higher hydrogen-ion-reducing ability of M-MoS 2 -TS (M = Cu, V) compared to bare MoS 2 -TS. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Doping_of_MoS_sub_2_sub_by_Cu_and_V_An_Efficient_Strategy_for_the_Enhancement_of_Hydrogen_Evolution_Activity/14403631 |
| DOI: |
10.1021/acs.langmuir.1c00036.s001 |
| الاتاحة: |
https://doi.org/10.1021/acs.langmuir.1c00036.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.89DC544A |
| قاعدة البيانات: |
BASE |