Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions
Design of highly efficient catalysts has already been a challenge in the exploration of renewable energies based on nanotechnologies. Herein, a feasible strategy of three-dimensional (3D)/two-dimensional (2D) nanojunctions was employed to achieve a prominently enhanced activity in both solar hydroge...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier BV
2018
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| Online Access: | http://purl.org/au-research/grants/arc/DP150103026 http://hdl.handle.net/20.500.11937/72745 |
| _version_ | 1848762831203205120 |
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| author | Liu, Y. Xu, X. Zhang, J. Zhang, H. Tian, W. Li, X. Tade, Moses Sun, Hongqi Wang, Shaobin |
| author_facet | Liu, Y. Xu, X. Zhang, J. Zhang, H. Tian, W. Li, X. Tade, Moses Sun, Hongqi Wang, Shaobin |
| author_sort | Liu, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Design of highly efficient catalysts has already been a challenge in the exploration of renewable energies based on nanotechnologies. Herein, a feasible strategy of three-dimensional (3D)/two-dimensional (2D) nanojunctions was employed to achieve a prominently enhanced activity in both solar hydrogen evolution and electrochemical hydrogen generation from water splitting. Flower-like MoS2nanoparticles with thin-layers were fabricated using a one-pot hydrothermal process and were further attached to g-C3N4nanosheets via their (002) crystal planes to form an intimate face-to-face contact. The hybrid catalysts exhibited a red-shift to the visible light region with an enhanced absorption capacity. At the optimal loading of 0.5 wt% MoS2, MoS2/g-C3N4exhibited the highest photocatalytic H2evolution rate of 867.6 µmol h-1g-1under simulated sunlight irradiations, which is 2.8 times as high as that of pure g-C3N4. Furthermore, the average photocatalytic H2evolution rate was elevated to ca. 5 times as high as that of pure g-C3N4under visible light irradiations. The synergistic effect responsible for the enhanced HER (hydrogen evolution reaction) performance might be originated from the intimate interface between the light-harvesting g-C3N4and MoS2as the active sites with the decreased overpotential, lowered charge-transfer resistance and increased electrical conductivity, leading to a more efficient charge separation and a higher reductive potential. In addition, the lower overpotential and smaller Tafel slope on 0.5 wt% MoS2/g-C3N4lead to the enhancement of electrochemical HER performance compared to pure g-C3N4. This work provides a feasible protocol for rational design of highly efficient HER electrocatalysts and photocatalysts towards future energy innovation. |
| first_indexed | 2025-11-14T10:53:49Z |
| format | Journal Article |
| id | curtin-20.500.11937-72745 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:53:49Z |
| publishDate | 2018 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-727452022-10-26T07:15:26Z Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions Liu, Y. Xu, X. Zhang, J. Zhang, H. Tian, W. Li, X. Tade, Moses Sun, Hongqi Wang, Shaobin Design of highly efficient catalysts has already been a challenge in the exploration of renewable energies based on nanotechnologies. Herein, a feasible strategy of three-dimensional (3D)/two-dimensional (2D) nanojunctions was employed to achieve a prominently enhanced activity in both solar hydrogen evolution and electrochemical hydrogen generation from water splitting. Flower-like MoS2nanoparticles with thin-layers were fabricated using a one-pot hydrothermal process and were further attached to g-C3N4nanosheets via their (002) crystal planes to form an intimate face-to-face contact. The hybrid catalysts exhibited a red-shift to the visible light region with an enhanced absorption capacity. At the optimal loading of 0.5 wt% MoS2, MoS2/g-C3N4exhibited the highest photocatalytic H2evolution rate of 867.6 µmol h-1g-1under simulated sunlight irradiations, which is 2.8 times as high as that of pure g-C3N4. Furthermore, the average photocatalytic H2evolution rate was elevated to ca. 5 times as high as that of pure g-C3N4under visible light irradiations. The synergistic effect responsible for the enhanced HER (hydrogen evolution reaction) performance might be originated from the intimate interface between the light-harvesting g-C3N4and MoS2as the active sites with the decreased overpotential, lowered charge-transfer resistance and increased electrical conductivity, leading to a more efficient charge separation and a higher reductive potential. In addition, the lower overpotential and smaller Tafel slope on 0.5 wt% MoS2/g-C3N4lead to the enhancement of electrochemical HER performance compared to pure g-C3N4. This work provides a feasible protocol for rational design of highly efficient HER electrocatalysts and photocatalysts towards future energy innovation. 2018 Journal Article http://hdl.handle.net/20.500.11937/72745 10.1016/j.apcatb.2018.08.028 http://purl.org/au-research/grants/arc/DP150103026 Elsevier BV restricted |
| spellingShingle | Liu, Y. Xu, X. Zhang, J. Zhang, H. Tian, W. Li, X. Tade, Moses Sun, Hongqi Wang, Shaobin Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions |
| title | Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions |
| title_full | Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions |
| title_fullStr | Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions |
| title_full_unstemmed | Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions |
| title_short | Flower-like MoS2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions |
| title_sort | flower-like mos2 on graphitic carbon nitride for enhanced photocatalytic and electrochemical hydrogen evolutions |
| url | http://purl.org/au-research/grants/arc/DP150103026 http://hdl.handle.net/20.500.11937/72745 |