Conductive MoS2 Quantum Dot/Polyaniline Aerogel for Enhanced Electrocatalytic Hydrogen Evolution and Photoresponse Properties
Abstract
The low conductivity and poor active sites of MoS 2 sheet present a huge barrier for it is exploitation of catalytic applications in the hydrogen evolution reaction (HER). To alleviate this difficulty, we have synthesized MoS 2 quantum dots (QDs) having greater quantity of catalytic edge sites by breaking up the bulk MoS 2 sheet using the solvent exfoliation technique. The synthesized MoS 2 QDs are embedded into polyaniline (PANI)– N, N ′-dibenzoyl- l -cystine (DBC) hydrogel matrix by in situ polymerization of aniline where DBC acts as a gelator, dopant, and cross-linker. The hybrid conducting aerogels (DBC-MoS 2 -PANI) thus produced act as an efficient electrocatalyst showing lower HER overpotential in comparison to MoS 2 QDs. It exhibits an optimum overpotential value of 196 mV at 10 mA cm –2, a favorable Tafel slope of 58 mV/dec, and an excellent cyclic stability. Also, DBC-MoS 2 -PANI aerogel is used in photoresponding devices. The DBC-MoS 2 -PANI hybrid aerogel exhibits a better photoresponse compared to the DBC-PANI aerogel and MoS 2 QDs upon white light illumination of 1 sun. The hybrid aerogel exhibits a maximum enhancement of photocurrent to the value of 3.95 mA at 2 V bias, and the time-dependent photoillumination shows much faster rise and decay of photocurrent compared to those of DBC-PANI aerogel and MoS 2 QDs.
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MoS2 quantum dots showed much lower HER activity with η10 of 262 mV and Tafel slope of 69 mV dec−1 compared to DBC-MoS2-PANI aerogel.
“On the other hand, MoS2 quantum dots showed much lower HER activity with η10 of 262 mV and Tafel slope of 69 mV dec−1 when compared to DBC-MoS2-PANI aerogel.”
From Aerogels for Electrocatalytic Hydrogen Production (2024) · cites this paper as [33]
DBC-MoS2-PANI aerogel exhibited HER η10 of 196 mV and Tafel slope of 58 mV dec−1 in 0.5 M H2SO4.
“DBC-MoS2-PANI aerogel exhibited HER η10 of 196 mV and Tafel slope of 58 mV dec−1 in 0.5 M H2SO4.”
From Aerogels for Electrocatalytic Hydrogen Production (2024) · cites this paper as [33]
Das et al. synthesized MoS2 quantum dots with abundant edge sites and embedded them into a polyaniline-N,N′-Dibenzoyl-L-cystine hydrogel matrix resulting in a conducting hybrid aerogel (DBC-MoS2-PANI).
“Das et al. [33] synthesized MoS2 quantum dots with abundant edge sites and embedded them into polyaniline – N, N′-Dibenzoyl-L-cystine hydrogel matrix resulting in conducting hybrid aerogel (DBC-MoS2-PANI).”
From Aerogels for Electrocatalytic Hydrogen Production (2024) · cites this paper as [33]
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Rational Design of Cobalt–Iron Selenides for Highly Efficient Electrochemical Water Oxidation
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Engineering of MoS<sub>2</sub> Quantum Dots/PANI Aerogel for High Performance Supercapaciator
Das, S., & Nandi, A. K. (2019) · Macromolecular Symposia · doi:10.1002/masy.201800242 · Cited by 10 · see citing works
Self-citationChen, Z., Zhang, S., Yang, J., Chen, C., Song, Y., Xu, C., Wu, M., & Liao, J. (2021) · Sustainable Energy & Fuels · doi:10.1039/d1se01149a · Cited by 9 · see citing works
Aerogels for Electrocatalytic Hydrogen Production
Murthy, A. P. (2024) · Aerogels for Energy Saving and Storage · doi:10.1002/9781119717645.ch12 · Cited by 2 · see citing works
- Authors
- Das, S., Ghosh, R., Routh, P., Shit, A., Mondal, S., Panja, A., & Nandi, A. K.
- Affiliations
- Indian Association for the Cultivation of Science (IN)
- Corresponding author
- Nandi, Arun K.
- Venue
- ACS Applied Nano Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-05-03
- Volume
- 1
- Issue
- 5
- Pages
- 2306-2316
- ISSN
- 2574-0970 (ISSN-L)
- OpenAlex
- W2802465031
- Cited by
- 59
- References
- 6
- Citations by year
- 2026: 11 · 2025: 9 · 2024: 4 · 2023: 8 · 2022: 7 · 2021: 4 · 2020: 7 · 2019: 7 · 2018: 2
- FWCI
- 1.16
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- ACS Applied Nano Materials (publishedVersion)
- Funders
- Council of Scientific and Industrial Research (02(0241)/15/EMR-II)
- Department of Science and Technology, Ministry of Science and Technology
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Polymers and Plastics › Conducting polymers and applications
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
- Keywords
- MoS2 quantum dots, electrocatalytic hydrogen evolution, conductive hydrogels, solvent exfoliation, edge sites, in situ aniline polymerization, photoresponse, hybrid aerogels, Tafel slope, cycling stability
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