| Autor: |
R. Ashwini, V.G. Dileepkumar, K.R. Balaji, R. Viswanatha, C.R. Ravikumar, Chandan Srivastava, Mysore Sridhar Santosh |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Sensors International, Vol 2, Iss , Pp 100125- (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2666-3511 |
| DOI: |
10.1016/j.sintl.2021.100125 |
| Popis: |
By employing a simple hydrothermal process, a new class of ternary alkali metal-based chalcogenide (NaFeS2 (NFS)) has been produced and anchored on to reduced graphene oxide (rGO) sheets for the first time. Transition metal-based chalcogenides (TMC) exhibit limited conductivity because of their semiconducting nature and hence, engineering TMCs with 2D carbonaceous materials yields better catalytic performance. Alkali metal-based chalcogenides and their composites appear to be promising alternatives, whose electrochemical properties haven't been explored much. This work presents a detailed insight into the structure and morphology of the prepared NFS-rGO composite, along with its electrochemical properties. The cyclic voltammetry (CV) response at the NFS-rGO composite electrode for the redox probe K4Fe(CN)6 is better with low peak to peak separation potentials (ΔEp = 99 mV) compared to the individual components NFS (ΔEp = 190 mV) and GO (∆Ep = 130 mV), indicating a better electron transfer kinetics. The NFS-rGO composite electrode displays an enhanced electrocatalytic activity as evidenced by the high electrochemically active surface area (6.09 × 10−2 cm2) and the heterogeneous electron transfer rate constant (k0 = 5.4 × 10−2 cms−1). In general, the NFS-rGO composite exhibits excellent material as well electrocatalytic properties due to the synergistic effect between NFS and rGO and can further be explored for electrochemical sensing applications as well. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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