Salt-Templated Nanoarchitectonics of CoSe<sub>2</sub>-NC Nanosheets as an Efficient Bifunctional Oxygen Electrocatalyst for Water Splitting
Recently, the extensive research of efficient bifunctional electrocatalysts (oxygen evolution reaction (OER) and hydrogen evolution reaction (HER)) on water splitting has drawn increasing attention. Herein, a salt-template strategy is prepared to synthesize nitrogen-doped carbon nanosheets encapsula...
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MDPI AG
2022-05-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/23/9/5239 |
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| author | Hong Cao Hailong Li Linhao Liu Kangning Xue Xinkai Niu Juan Hou Long Chen |
| author_facet | Hong Cao Hailong Li Linhao Liu Kangning Xue Xinkai Niu Juan Hou Long Chen |
| author_sort | Hong Cao |
| collection | DOAJ |
| description | Recently, the extensive research of efficient bifunctional electrocatalysts (oxygen evolution reaction (OER) and hydrogen evolution reaction (HER)) on water splitting has drawn increasing attention. Herein, a salt-template strategy is prepared to synthesize nitrogen-doped carbon nanosheets encapsulated with dispersed CoSe<sub>2</sub> nanoparticles (CoSe<sub>2</sub>-NC NSs), while the thickness of CoSe<sub>2</sub>-NC NSs is only about 3.6 nm. Profiting from the ultrathin morphology, large surface area, and promising electrical conductivity, the CoSe<sub>2</sub>-NC NSs exhibited excellent electrocatalytic of 10 mA·cm<sup>−2</sup> current density at small overpotentials of 247 mV for OER and 75 mV for HER. Not only does the nitrogen-doped carbon matrix effectively avoid self-aggregation of CoSe<sub>2</sub> nanoparticles, but it also prevents the corrosion of CoSe<sub>2</sub> from electrolytes and shows favorable durability after long-term stability tests. Furthermore, an overall water-splitting system delivers a current density of 10 mA·cm<sup>−2</sup> at a voltage of 1.54 V with resultants being both the cathode and anode catalyst in alkaline solutions. This work provides a new way to synthesize efficient and nonprecious bifunctional electrocatalysts for water splitting. |
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| id | doaj.art-b7e9b155f19546a2b856b724ee0ba4c5 |
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| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T04:03:36Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
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| series | International Journal of Molecular Sciences |
| spelling | doaj.art-b7e9b155f19546a2b856b724ee0ba4c52023-11-23T08:29:08ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672022-05-01239523910.3390/ijms23095239Salt-Templated Nanoarchitectonics of CoSe<sub>2</sub>-NC Nanosheets as an Efficient Bifunctional Oxygen Electrocatalyst for Water SplittingHong Cao0Hailong Li1Linhao Liu2Kangning Xue3Xinkai Niu4Juan Hou5Long Chen6Key Laboratory of Ecophysics, Department of Physics, College of Science, Shihezi University, Shihezi 832003, ChinaKey Laboratory of Ecophysics, Department of Physics, College of Science, Shihezi University, Shihezi 832003, ChinaKey Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, ChinaKey Laboratory of Ecophysics, Department of Physics, College of Science, Shihezi University, Shihezi 832003, ChinaKey Laboratory of Ecophysics, Department of Physics, College of Science, Shihezi University, Shihezi 832003, ChinaKey Laboratory of Ecophysics, Department of Physics, College of Science, Shihezi University, Shihezi 832003, ChinaKey Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, ChinaRecently, the extensive research of efficient bifunctional electrocatalysts (oxygen evolution reaction (OER) and hydrogen evolution reaction (HER)) on water splitting has drawn increasing attention. Herein, a salt-template strategy is prepared to synthesize nitrogen-doped carbon nanosheets encapsulated with dispersed CoSe<sub>2</sub> nanoparticles (CoSe<sub>2</sub>-NC NSs), while the thickness of CoSe<sub>2</sub>-NC NSs is only about 3.6 nm. Profiting from the ultrathin morphology, large surface area, and promising electrical conductivity, the CoSe<sub>2</sub>-NC NSs exhibited excellent electrocatalytic of 10 mA·cm<sup>−2</sup> current density at small overpotentials of 247 mV for OER and 75 mV for HER. Not only does the nitrogen-doped carbon matrix effectively avoid self-aggregation of CoSe<sub>2</sub> nanoparticles, but it also prevents the corrosion of CoSe<sub>2</sub> from electrolytes and shows favorable durability after long-term stability tests. Furthermore, an overall water-splitting system delivers a current density of 10 mA·cm<sup>−2</sup> at a voltage of 1.54 V with resultants being both the cathode and anode catalyst in alkaline solutions. This work provides a new way to synthesize efficient and nonprecious bifunctional electrocatalysts for water splitting.https://www.mdpi.com/1422-0067/23/9/5239metal–organic frameworksnitrogen-doped carbonCoSe<sub>2</sub>oxygen reduction reactionhydrogen evolution reaction |
| spellingShingle | Hong Cao Hailong Li Linhao Liu Kangning Xue Xinkai Niu Juan Hou Long Chen Salt-Templated Nanoarchitectonics of CoSe<sub>2</sub>-NC Nanosheets as an Efficient Bifunctional Oxygen Electrocatalyst for Water Splitting International Journal of Molecular Sciences metal–organic frameworks nitrogen-doped carbon CoSe<sub>2</sub> oxygen reduction reaction hydrogen evolution reaction |
| title | Salt-Templated Nanoarchitectonics of CoSe<sub>2</sub>-NC Nanosheets as an Efficient Bifunctional Oxygen Electrocatalyst for Water Splitting |
| title_full | Salt-Templated Nanoarchitectonics of CoSe<sub>2</sub>-NC Nanosheets as an Efficient Bifunctional Oxygen Electrocatalyst for Water Splitting |
| title_fullStr | Salt-Templated Nanoarchitectonics of CoSe<sub>2</sub>-NC Nanosheets as an Efficient Bifunctional Oxygen Electrocatalyst for Water Splitting |
| title_full_unstemmed | Salt-Templated Nanoarchitectonics of CoSe<sub>2</sub>-NC Nanosheets as an Efficient Bifunctional Oxygen Electrocatalyst for Water Splitting |
| title_short | Salt-Templated Nanoarchitectonics of CoSe<sub>2</sub>-NC Nanosheets as an Efficient Bifunctional Oxygen Electrocatalyst for Water Splitting |
| title_sort | salt templated nanoarchitectonics of cose sub 2 sub nc nanosheets as an efficient bifunctional oxygen electrocatalyst for water splitting |
| topic | metal–organic frameworks nitrogen-doped carbon CoSe<sub>2</sub> oxygen reduction reaction hydrogen evolution reaction |
| url | https://www.mdpi.com/1422-0067/23/9/5239 |
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