Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen Evolution
Two-dimensional transition-metal dichalcogenides (TMDs) possess interesting catalytic properties for the electrochemical-assisted hydrogen-evolution reaction (HER). We used niobium diselenide (NbSe<sub>2</sub>) as a representative TMD, and prepared single-layer NbSe<sub>2</sub&g...
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MDPI AG
2019-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/9/5/751 |
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| author | Jianxing Wang Xinyue Liu Ying Liu Guowei Yang |
| author_facet | Jianxing Wang Xinyue Liu Ying Liu Guowei Yang |
| author_sort | Jianxing Wang |
| collection | DOAJ |
| description | Two-dimensional transition-metal dichalcogenides (TMDs) possess interesting catalytic properties for the electrochemical-assisted hydrogen-evolution reaction (HER). We used niobium diselenide (NbSe<sub>2</sub>) as a representative TMD, and prepared single-layer NbSe<sub>2</sub> porous nanosheets (PNS) by a double-sonication liquid-phase exfoliation, with H<sub>2</sub>O<sub>2</sub> as a pore-forming agent. The single-layer NbSe<sub>2</sub> PNS were drop-cast on carbon foam (CF) to fabricate a three-dimensional robust NbSe<sub>2</sub> PNS/CF electrode. The NbSe<sub>2</sub> PNS/CF electrode exhibits a high current density of −50 mA cm<sup>−2</sup> with an overpotential of 148 mV and a Tafel slope of 75.8 eV dec<sup>−1</sup> for the HER process. Little deactivation is detected in continuous CV testing up to 20,000 cycles, which suggests that this novel NbSe<sub>2</sub> PNS/CF is a promising catalytic electrode in the HER application. The porous structure of single-layer NbSe<sub>2</sub> nanosheets can enhance the electrochemical performance compared with that of pore-free NbSe<sub>2</sub> nanosheets. These findings illustrate that the single-layer NbSe<sub>2</sub> PNS is a potential electrocatalytic material for HER. More importantly, the electrochemical performance of the NbSe<sub>2</sub> PNS/CF expands the use of two-dimensional TMDs in electrocatalysis-related fields. |
| first_indexed | 2024-12-14T01:53:14Z |
| format | Article |
| id | doaj.art-134b588baa5444979d6b916dd22e2e1f |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-14T01:53:14Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-134b588baa5444979d6b916dd22e2e1f2022-12-21T23:21:18ZengMDPI AGNanomaterials2079-49912019-05-019575110.3390/nano9050751nano9050751Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen EvolutionJianxing Wang0Xinyue Liu1Ying Liu2Guowei Yang3State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, School of Physics, Sun Yat-sen University, Guangzhou 510275, Guangdong, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, School of Physics, Sun Yat-sen University, Guangzhou 510275, Guangdong, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, School of Physics, Sun Yat-sen University, Guangzhou 510275, Guangdong, ChinaState Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, School of Physics, Sun Yat-sen University, Guangzhou 510275, Guangdong, ChinaTwo-dimensional transition-metal dichalcogenides (TMDs) possess interesting catalytic properties for the electrochemical-assisted hydrogen-evolution reaction (HER). We used niobium diselenide (NbSe<sub>2</sub>) as a representative TMD, and prepared single-layer NbSe<sub>2</sub> porous nanosheets (PNS) by a double-sonication liquid-phase exfoliation, with H<sub>2</sub>O<sub>2</sub> as a pore-forming agent. The single-layer NbSe<sub>2</sub> PNS were drop-cast on carbon foam (CF) to fabricate a three-dimensional robust NbSe<sub>2</sub> PNS/CF electrode. The NbSe<sub>2</sub> PNS/CF electrode exhibits a high current density of −50 mA cm<sup>−2</sup> with an overpotential of 148 mV and a Tafel slope of 75.8 eV dec<sup>−1</sup> for the HER process. Little deactivation is detected in continuous CV testing up to 20,000 cycles, which suggests that this novel NbSe<sub>2</sub> PNS/CF is a promising catalytic electrode in the HER application. The porous structure of single-layer NbSe<sub>2</sub> nanosheets can enhance the electrochemical performance compared with that of pore-free NbSe<sub>2</sub> nanosheets. These findings illustrate that the single-layer NbSe<sub>2</sub> PNS is a potential electrocatalytic material for HER. More importantly, the electrochemical performance of the NbSe<sub>2</sub> PNS/CF expands the use of two-dimensional TMDs in electrocatalysis-related fields.https://www.mdpi.com/2079-4991/9/5/751TMDsniobium diselenidehydrogen evolutionelectrocatalysis |
| spellingShingle | Jianxing Wang Xinyue Liu Ying Liu Guowei Yang Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen Evolution Nanomaterials TMDs niobium diselenide hydrogen evolution electrocatalysis |
| title | Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen Evolution |
| title_full | Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen Evolution |
| title_fullStr | Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen Evolution |
| title_full_unstemmed | Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen Evolution |
| title_short | Active Pore-Edge Engineering of Single-Layer Niobium Diselenide Porous Nanosheets Electrode for Hydrogen Evolution |
| title_sort | active pore edge engineering of single layer niobium diselenide porous nanosheets electrode for hydrogen evolution |
| topic | TMDs niobium diselenide hydrogen evolution electrocatalysis |
| url | https://www.mdpi.com/2079-4991/9/5/751 |
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