Electrodeposition of Au Nanoparticles on 2D Layered Materials and Their Applications in Electrocatalysis of Nitrite
This study presents a comparative analysis of gold nanoparticles electrodeposited on different two-dimensional materials used as electrode substrates, graphene (Gr) and MoS<sub>2</sub>, or co-deposited with the metallic material MoS<sub>2</sub>. The morphological and electroc...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Chemosensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2227-9040/13/5/180 |
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| Summary: | This study presents a comparative analysis of gold nanoparticles electrodeposited on different two-dimensional materials used as electrode substrates, graphene (Gr) and MoS<sub>2</sub>, or co-deposited with the metallic material MoS<sub>2</sub>. The morphological and electrochemical data demonstrate the efficiency of the electrodeposition process and the preferability of gold nanoparticles for certain attachment sites depending on the nature of the material used as a substrate and the deposition method used. The electrocatalytic activity of the gold nanoparticles obtained in these configurations was evaluated via the oxidation of nitrite ions (NO<sub>2</sub><sup>−</sup>), using both qualitative and quantitative approaches, by cyclic voltammetry and amperometry techniques. The electrocatalytic activity of gold nanoparticles co-deposited with MoS<sub>2</sub> is superior compared to that of gold nanoparticles deposited either on bare gold electrodes or on 2D materials (graphene and MoS<sub>2</sub>), showing good performance with a specific sensitivity of 1.043 μA µM<sup>−1</sup> cm<sup>−2</sup> on the linear range of 0.5–600 µM nitrite, with a limit of detection of 0.16 µM and good anti-interference ability. |
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| ISSN: | 2227-9040 |