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Bui HT, Lam ND, Linh DC, Mai NT, Chang H, Han SH, Oanh VTK, Pham AT, Patil SA, Tung NT, Shrestha NK. Escalating Catalytic Activity for Hydrogen Evolution Reaction on MoSe 2@Graphene Functionalization. Nanomaterials (Basel) 2023; 13:2139. [PMID: 37513150 PMCID: PMC10384179 DOI: 10.3390/nano13142139] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 07/20/2023] [Accepted: 07/22/2023] [Indexed: 07/30/2023]
Abstract
Developing highly efficient and durable hydrogen evolution reaction (HER) electrocatalysts is crucial for addressing the energy and environmental challenges. Among the 2D-layered chalcogenides, MoSe2 possesses superior features for HER catalysis. The van der Waals attractions and high surface energy, however, stack the MoSe2 layers, resulting in a loss of edge active catalytic sites. In addition, MoSe2 suffers from low intrinsic conductivity and weak electrical contact with active sites. To overcome the issues, this work presents a novel approach, wherein the in situ incorporated diethylene glycol solvent into the interlayers of MoSe2 during synthesis when treated thermally in an inert atmosphere at 600 °C transformed into graphene (Gr). This widened the interlayer spacing of MoSe2, thereby exposing more HER active edge sites with high conductivity offered by the incorporated Gr. The resulting MoSe2-Gr composite exhibited a significantly enhanced HER catalytic activity compared to the pristine MoSe2 in an acidic medium and demonstrated a superior HER catalytic activity compared to the state-of-the-art Pt/C catalyst, particularly at a high current density beyond ca. 55 mA cm-2. Additionally, the MoSe2-Gr catalyst demonstrated long-term electrochemical stability during HER. This work, thus, presents a facile and novel approach for obtaining an efficient MoSe2 electrocatalyst applicable in green hydrogen production.
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Affiliation(s)
- Hoa Thi Bui
- Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Nguyen Duc Lam
- Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Do Chi Linh
- Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Nguyen Thi Mai
- Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - HyungIl Chang
- Department of Chemistry, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Sung-Hwan Han
- Department of Chemistry, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Vu Thi Kim Oanh
- Institute of Physic and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Anh Tuan Pham
- Institute of Engineering and Technology, Thu Dau Mot University, Binh Duong 75000, Vietnam
| | - Supriya A Patil
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Nguyen Thanh Tung
- Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Nabeen K Shrestha
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of Korea
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Kanjwal MA, Ghaferi AA. Advanced Waveguide Based LOC Biosensors: A Minireview. Sensors (Basel) 2022; 22:5443. [PMID: 35891123 PMCID: PMC9323137 DOI: 10.3390/s22145443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/28/2022] [Accepted: 07/13/2022] [Indexed: 06/15/2023]
Abstract
This mini review features contemporary advances in mid-infrared (MIR) thin-film waveguide technology and on-chip photonics, promoting high-performance biosensing platforms. Supported by recent developments in MIR thin-film waveguides, it is expected that label-free assimilated MIR sensing platforms will soon supplement the current sensing technologies for biomedical diagnostics. The state-of-the-art shows that various types of waveguide material can be utilized for waveguide spectroscopic measurements in MIR. However, there are challenges to integrating these waveguide platforms with microfluidic/Lab-on-a-Chip (LOC) devices, due to poor light-material interactions. Graphene and its analogs have found many applications in microfluidic-based LOC devices, to address to this issue. Graphene-based materials possess a high conductivity, a large surface-to-volume ratio, a smaller and tunable bandgap, and allow easier sample loading; which is essential for acquiring precise electrochemical information. This work discusses advanced waveguide materials, their advantages, and disease diagnostics with MIR thin-film based waveguides. The incorporation of graphene into waveguides improves the light-graphene interaction, and photonic devices greatly benefit from graphene's strong field-controlled optical response.
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