Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution
We report the enhancement of electrocatalytic activity in sulfonate (− SO3H) group functionalized two-dimensional molybdenum disulfide (2D-s-MoS2) nanosheets for their use in hydrogen evolution reaction (HER). These as-developed nanosheets have been decorated with sustainable biomass-derived carbon...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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ELSEVIER
2025
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| Online Access: | http://umpir.ump.edu.my/id/eprint/44820/ http://umpir.ump.edu.my/id/eprint/44820/1/Carbon%20quantum%20dots%20implanted%20sulfonated%202D-MoS2%20for%20hydrogen.pdf |
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| author | Sarkar, Akash Ganesh, Gayathry Qamar, Ummiya Singh, Vivek Kumar Sharma, Ruchi Srivastava, Ankur Venugopal, Gunasekaran Rajan, Jose Das, Santanu |
| author_facet | Sarkar, Akash Ganesh, Gayathry Qamar, Ummiya Singh, Vivek Kumar Sharma, Ruchi Srivastava, Ankur Venugopal, Gunasekaran Rajan, Jose Das, Santanu |
| author_sort | Sarkar, Akash |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | We report the enhancement of electrocatalytic activity in sulfonate (− SO3H) group functionalized two-dimensional molybdenum disulfide (2D-s-MoS2) nanosheets for their use in hydrogen evolution reaction (HER). These as-developed nanosheets have been decorated with sustainable biomass-derived carbon quantum dots (CQDs) via a sonochemical method, creating a s-MoS2-CQD composite material. This innovative composite demonstrates significantly improved electrocatalytic performance for the hydrogen evolution reaction (HER) via water splitting. In particular, incorporating CQDs on 2D-s-MoS2 overcomes many limitations, as observed in pristine 2D-MoS2 and 2D-s-MoS2, especially regarding low electrical conductivity and restricted electrocatalytic activity on the basal plane. Incorporating CQDs enhances electron transfer efficiency, increases the availability of active sites, and enhances overall conductivity. As a result, the s-MoS2-CQD achieves remarkable HER performance, featuring a lower overpotential of ~ 273 mV and a reduced Tafel slope of 67 mV/dec compared to s-MoS2. These enhancements signify faster reaction kinetics, accelerated H* adsorption–desorption, and greater catalytic efficiency. Furthermore, using sustainably synthesized CQDs positions this approach as a cost-effective, scalable, and environmentally friendly alternative to traditional noble-metal catalysts. This research highlights the potential of functionalized twodimensional materials, such as s-MoS2, implanted with zero-dimensional materials, such as CQDs, to advance sustainable hydrogen production technologies, thereby contributing to the global shift towards clean energy solutions. |
| first_indexed | 2025-11-15T03:56:47Z |
| format | Article |
| id | ump-44820 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T03:56:47Z |
| publishDate | 2025 |
| publisher | ELSEVIER |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-448202025-06-16T04:02:12Z http://umpir.ump.edu.my/id/eprint/44820/ Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution Sarkar, Akash Ganesh, Gayathry Qamar, Ummiya Singh, Vivek Kumar Sharma, Ruchi Srivastava, Ankur Venugopal, Gunasekaran Rajan, Jose Das, Santanu QD Chemistry TA Engineering (General). Civil engineering (General) TP Chemical technology We report the enhancement of electrocatalytic activity in sulfonate (− SO3H) group functionalized two-dimensional molybdenum disulfide (2D-s-MoS2) nanosheets for their use in hydrogen evolution reaction (HER). These as-developed nanosheets have been decorated with sustainable biomass-derived carbon quantum dots (CQDs) via a sonochemical method, creating a s-MoS2-CQD composite material. This innovative composite demonstrates significantly improved electrocatalytic performance for the hydrogen evolution reaction (HER) via water splitting. In particular, incorporating CQDs on 2D-s-MoS2 overcomes many limitations, as observed in pristine 2D-MoS2 and 2D-s-MoS2, especially regarding low electrical conductivity and restricted electrocatalytic activity on the basal plane. Incorporating CQDs enhances electron transfer efficiency, increases the availability of active sites, and enhances overall conductivity. As a result, the s-MoS2-CQD achieves remarkable HER performance, featuring a lower overpotential of ~ 273 mV and a reduced Tafel slope of 67 mV/dec compared to s-MoS2. These enhancements signify faster reaction kinetics, accelerated H* adsorption–desorption, and greater catalytic efficiency. Furthermore, using sustainably synthesized CQDs positions this approach as a cost-effective, scalable, and environmentally friendly alternative to traditional noble-metal catalysts. This research highlights the potential of functionalized twodimensional materials, such as s-MoS2, implanted with zero-dimensional materials, such as CQDs, to advance sustainable hydrogen production technologies, thereby contributing to the global shift towards clean energy solutions. ELSEVIER 2025 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/44820/1/Carbon%20quantum%20dots%20implanted%20sulfonated%202D-MoS2%20for%20hydrogen.pdf Sarkar, Akash and Ganesh, Gayathry and Qamar, Ummiya and Singh, Vivek Kumar and Sharma, Ruchi and Srivastava, Ankur and Venugopal, Gunasekaran and Rajan, Jose and Das, Santanu (2025) Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution. Applied Surface Science, 702 (163315). pp. 1-7. ISSN 0169-4332. (Published) https://doi.org/10.1016/j.apsusc.2025.163315 https://doi.org/10.1016/j.apsusc.2025.163315 |
| spellingShingle | QD Chemistry TA Engineering (General). Civil engineering (General) TP Chemical technology Sarkar, Akash Ganesh, Gayathry Qamar, Ummiya Singh, Vivek Kumar Sharma, Ruchi Srivastava, Ankur Venugopal, Gunasekaran Rajan, Jose Das, Santanu Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution |
| title | Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution |
| title_full | Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution |
| title_fullStr | Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution |
| title_full_unstemmed | Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution |
| title_short | Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution |
| title_sort | carbon quantum dots implanted sulfonated 2d-mos2 for hydrogen evolution |
| topic | QD Chemistry TA Engineering (General). Civil engineering (General) TP Chemical technology |
| url | http://umpir.ump.edu.my/id/eprint/44820/ http://umpir.ump.edu.my/id/eprint/44820/ http://umpir.ump.edu.my/id/eprint/44820/ http://umpir.ump.edu.my/id/eprint/44820/1/Carbon%20quantum%20dots%20implanted%20sulfonated%202D-MoS2%20for%20hydrogen.pdf |