Vertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen Evolution
Abstract Efficient evolution of hydrogen through electrocatalysis holds tremendous promise for clean energy. The catalytic efficiency for hydrogen evolution reaction (HER) strongly depends on the number and activity of active sites. To this end, making vertically aligned, ultrathin, and along with r...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-05-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s11671-018-2570-x |
| _version_ | 1797728752964206592 |
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| author | Qunying He Longlu Wang Kai Yin Shenglian Luo |
| author_facet | Qunying He Longlu Wang Kai Yin Shenglian Luo |
| author_sort | Qunying He |
| collection | DOAJ |
| description | Abstract Efficient evolution of hydrogen through electrocatalysis holds tremendous promise for clean energy. The catalytic efficiency for hydrogen evolution reaction (HER) strongly depends on the number and activity of active sites. To this end, making vertically aligned, ultrathin, and along with rich metallic phase WS2 nanosheets is effective to maximally unearth the catalytic performance of WS2 nanosheets. Metallic 1T polymorph combined with vertically aligned ultrathin WS2 nanosheets on flat substrate is successfully prepared via one-step simple hydrothermal reaction. The nearly vertical orientation of WS2 nanosheets enables the active sites of surface edge and basal planes to be maximally exposed. Here, we report vertical 1T-WS2 nanosheets as efficient catalysts for hydrogen evolution with low overpotential of 118 mV at 10 mA cm−2 and a Tafel slope of 43 mV dec−1. In addition, the prepared WS2 nanosheets exhibit extremely high stability in acidic solution as the HER catalytic activity and show no degradation after 5000 continuous potential cycles. Our results indicate that vertical 1T-WS2 nanosheets are attractive alternative to the precious platinum benchmark catalyst and rival MoS2 materials that have recently been heavily scrutinized for hydrogen evolution. Graphical Abstract Vertical 1T-WS2 for hydrogen evolution. |
| first_indexed | 2024-03-12T11:18:39Z |
| format | Article |
| id | doaj.art-3c091cb2298e4f5da95d8392f08494a9 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T11:18:39Z |
| publishDate | 2018-05-01 |
| publisher | SpringerOpen |
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| series | Nanoscale Research Letters |
| spelling | doaj.art-3c091cb2298e4f5da95d8392f08494a92023-09-02T01:26:24ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2018-05-011311910.1186/s11671-018-2570-xVertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen EvolutionQunying He0Longlu Wang1Kai Yin2Shenglian Luo3State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan UniversityState Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan UniversityState Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan UniversityState Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan UniversityAbstract Efficient evolution of hydrogen through electrocatalysis holds tremendous promise for clean energy. The catalytic efficiency for hydrogen evolution reaction (HER) strongly depends on the number and activity of active sites. To this end, making vertically aligned, ultrathin, and along with rich metallic phase WS2 nanosheets is effective to maximally unearth the catalytic performance of WS2 nanosheets. Metallic 1T polymorph combined with vertically aligned ultrathin WS2 nanosheets on flat substrate is successfully prepared via one-step simple hydrothermal reaction. The nearly vertical orientation of WS2 nanosheets enables the active sites of surface edge and basal planes to be maximally exposed. Here, we report vertical 1T-WS2 nanosheets as efficient catalysts for hydrogen evolution with low overpotential of 118 mV at 10 mA cm−2 and a Tafel slope of 43 mV dec−1. In addition, the prepared WS2 nanosheets exhibit extremely high stability in acidic solution as the HER catalytic activity and show no degradation after 5000 continuous potential cycles. Our results indicate that vertical 1T-WS2 nanosheets are attractive alternative to the precious platinum benchmark catalyst and rival MoS2 materials that have recently been heavily scrutinized for hydrogen evolution. Graphical Abstract Vertical 1T-WS2 for hydrogen evolution.http://link.springer.com/article/10.1186/s11671-018-2570-xElectrocatalysisHydrogen evolution reactionWS2 nanosheetsMetallic 1T phase |
| spellingShingle | Qunying He Longlu Wang Kai Yin Shenglian Luo Vertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen Evolution Nanoscale Research Letters Electrocatalysis Hydrogen evolution reaction WS2 nanosheets Metallic 1T phase |
| title | Vertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen Evolution |
| title_full | Vertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen Evolution |
| title_fullStr | Vertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen Evolution |
| title_full_unstemmed | Vertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen Evolution |
| title_short | Vertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen Evolution |
| title_sort | vertically aligned ultrathin 1t ws2 nanosheets enhanced the electrocatalytic hydrogen evolution |
| topic | Electrocatalysis Hydrogen evolution reaction WS2 nanosheets Metallic 1T phase |
| url | http://link.springer.com/article/10.1186/s11671-018-2570-x |
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