Manipulating electronic band of NiO/NiMoO4–x nanosheets as robust bifunctional catalyst for water splitting
Due to the issues of energy shortage and environmental pollution, it is crucial to explore environmentally friendly and efficient bifunctional catalysts for oxygen and hydrogen evolution reaction (OER/HER). Herein, we demonstrate an oxygen vacancy-rich NiO/NiMoO4 heterojunction as bifunctional catal...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Next Nanotechnology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949829525000427 |
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| author | Qiyu Liu Jintao Zhang Jinjun He Peng Zhang Zujin Yang Xihong Lu |
| author_facet | Qiyu Liu Jintao Zhang Jinjun He Peng Zhang Zujin Yang Xihong Lu |
| author_sort | Qiyu Liu |
| collection | DOAJ |
| description | Due to the issues of energy shortage and environmental pollution, it is crucial to explore environmentally friendly and efficient bifunctional catalysts for oxygen and hydrogen evolution reaction (OER/HER). Herein, we demonstrate an oxygen vacancy-rich NiO/NiMoO4 heterojunction as bifunctional catalyst for electrocatalytic water splitting (denoted as NiO/NiMoO4–x) on commercial nickel foam by a facile hydrothermal-calcination method. The experimental results and density functional theory calculations confirm that the constructed heterostructure and oxygen vacancies optimize the electronic band structure of NiO/NiMoO4–x with more electronic states near the Fermi level, which not only enhances its conductivity, but also promotes exposure of the active sites. Based on this, NiO/NiMoO4–x possesses an impressive OER overpotential of 332 mV and HER overpotential of 34 mV at 10 mA cm–2, simultaneously, a satisfactory stability after continuous operation for 165 h. This work affords valuable insights into the development of durable and inexpensive bifunctional catalysts for electrocatalytic water splitting. |
| format | Article |
| id | doaj-art-5d0f00f75d1e4d37ba54295fe15736fa |
| institution | Kabale University |
| issn | 2949-8295 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Nanotechnology |
| spelling | doaj-art-5d0f00f75d1e4d37ba54295fe15736fa2025-08-20T03:30:48ZengElsevierNext Nanotechnology2949-82952025-01-01710017310.1016/j.nxnano.2025.100173Manipulating electronic band of NiO/NiMoO4–x nanosheets as robust bifunctional catalyst for water splittingQiyu Liu0Jintao Zhang1Jinjun He2Peng Zhang3Zujin Yang4Xihong Lu5School of Chemical Engineering and Technology, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chem & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, ChinaSchool of Chemical Engineering and Technology, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chem & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, ChinaSchool of Chemical Engineering and Technology, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chem & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, ChinaCollege of Materials Science and Engineering, Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad Laminate, Dongguan Cleaner Production Center, Dongguan University of Technology, Dongguan 523808, ChinaSchool of Chemical Engineering and Technology, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chem & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; Corresponding authors.School of Chemical Engineering and Technology, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-carbon Chem & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China; Corresponding authors.Due to the issues of energy shortage and environmental pollution, it is crucial to explore environmentally friendly and efficient bifunctional catalysts for oxygen and hydrogen evolution reaction (OER/HER). Herein, we demonstrate an oxygen vacancy-rich NiO/NiMoO4 heterojunction as bifunctional catalyst for electrocatalytic water splitting (denoted as NiO/NiMoO4–x) on commercial nickel foam by a facile hydrothermal-calcination method. The experimental results and density functional theory calculations confirm that the constructed heterostructure and oxygen vacancies optimize the electronic band structure of NiO/NiMoO4–x with more electronic states near the Fermi level, which not only enhances its conductivity, but also promotes exposure of the active sites. Based on this, NiO/NiMoO4–x possesses an impressive OER overpotential of 332 mV and HER overpotential of 34 mV at 10 mA cm–2, simultaneously, a satisfactory stability after continuous operation for 165 h. This work affords valuable insights into the development of durable and inexpensive bifunctional catalysts for electrocatalytic water splitting.http://www.sciencedirect.com/science/article/pii/S2949829525000427Water splittingHydrogen evolution reactionOxygen evolution reactionBifunctional catalystsNickel molybdate |
| spellingShingle | Qiyu Liu Jintao Zhang Jinjun He Peng Zhang Zujin Yang Xihong Lu Manipulating electronic band of NiO/NiMoO4–x nanosheets as robust bifunctional catalyst for water splitting Next Nanotechnology Water splitting Hydrogen evolution reaction Oxygen evolution reaction Bifunctional catalysts Nickel molybdate |
| title | Manipulating electronic band of NiO/NiMoO4–x nanosheets as robust bifunctional catalyst for water splitting |
| title_full | Manipulating electronic band of NiO/NiMoO4–x nanosheets as robust bifunctional catalyst for water splitting |
| title_fullStr | Manipulating electronic band of NiO/NiMoO4–x nanosheets as robust bifunctional catalyst for water splitting |
| title_full_unstemmed | Manipulating electronic band of NiO/NiMoO4–x nanosheets as robust bifunctional catalyst for water splitting |
| title_short | Manipulating electronic band of NiO/NiMoO4–x nanosheets as robust bifunctional catalyst for water splitting |
| title_sort | manipulating electronic band of nio nimoo4 x nanosheets as robust bifunctional catalyst for water splitting |
| topic | Water splitting Hydrogen evolution reaction Oxygen evolution reaction Bifunctional catalysts Nickel molybdate |
| url | http://www.sciencedirect.com/science/article/pii/S2949829525000427 |
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