Ni3S2@MoO3@Co3O4@AMO/NF core–shell heterostructure for high performance alkaline overall water splitting
Abstract The urgent need for bi-functional high-performance non-noble metal-based catalysts for water splitting requires the integration of both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) together, which not only increases the energy efficiency but also reduces fabrication...
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| Format: | Article |
| Language: | English |
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Springer
2025-07-01
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| Series: | Discover Nano |
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| Online Access: | https://doi.org/10.1186/s11671-025-04283-x |
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| author | Jiabang Liang Yu Liu Zegao Wang Yifan Jia Zhao Ding Liangjuan Gao |
| author_facet | Jiabang Liang Yu Liu Zegao Wang Yifan Jia Zhao Ding Liangjuan Gao |
| author_sort | Jiabang Liang |
| collection | DOAJ |
| description | Abstract The urgent need for bi-functional high-performance non-noble metal-based catalysts for water splitting requires the integration of both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) together, which not only increases the energy efficiency but also reduces fabrication cost. However, most non-noble metal-based catalysts for OER are not stable under alkaline conditions, while HER shows poor kinetic performance under alkaline conditions, which prevents the water splitting from scale-up applications. Therefore, in this paper, non-noble metal-based catalyst of Ni3S2@MoO3@Co3O4@AMO/NF was prepared by a two-step hydrothermal method followed by a galvanic replacement reaction with morphological characterization, demonstrating that the synthesized material has a core–shell structure. The electrochemical properties of Ni3S2@MoO3@Co3O4@AMO/NF were tested and analyzed, which confirmed its efficient electrocatalytic activity. The catalyst exhibited excellent OER in 1 M KOH solution, and a low overpotential of 248 mV was achieved at a current density of 10 mA cm−2. In addition, the catalyst maintained competitively low overpotentials even at high current densities, 281 mV and 303 mV at 50 mA cm−2 and 100 mA cm−2, respectively. Remarkably, only an overpotential of 185 mV was required to reach the current density of 10 mA cm−2 for HER. The excellent OER and HER performances could be attributed to the synergistic effects among AMO, Co3O4 and MoO3. In addition, Ni3S2@MoO3@Co3O4@AMO/NF required only 1.414 V at 10 mA cm−2 to complete the overall water splitting and exhibited excellent competitiveness also at high current densities (1.769 V and 1.975 V at 50 mA cm−2 and 100 mA cm−2, respectively). The morphology of Ni3S2@MoO3@Co3O4@AMO remained stable after long time i-t tests, which proved its long-term operational stability. The Faraday efficiencies of the OER and HER could reach 75.92% and 97.51%, respectively, which showed excellent electrocatalytic performance. Therefore, the synthesis of high-performance bifunctional catalysts based on a two-step hydrothermal reaction followed by a galvanic replacement reaction proposed in this study provides a new strategy for the simple and efficient synthesis of non-noble metal-based catalysts for high-performance overall water splitting. |
| format | Article |
| id | doaj-art-8d5438d4df95465087e02b4f7e816016 |
| institution | Kabale University |
| issn | 2731-9229 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Springer |
| record_format | Article |
| series | Discover Nano |
| spelling | doaj-art-8d5438d4df95465087e02b4f7e8160162025-08-20T04:02:55ZengSpringerDiscover Nano2731-92292025-07-0120112010.1186/s11671-025-04283-xNi3S2@MoO3@Co3O4@AMO/NF core–shell heterostructure for high performance alkaline overall water splittingJiabang Liang0Yu Liu1Zegao Wang2Yifan Jia3Zhao Ding4Liangjuan Gao5College of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, Sichuan UniversityCollege of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, Chongqing UniversityCollege of Materials Science and Engineering, Sichuan UniversityAbstract The urgent need for bi-functional high-performance non-noble metal-based catalysts for water splitting requires the integration of both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) together, which not only increases the energy efficiency but also reduces fabrication cost. However, most non-noble metal-based catalysts for OER are not stable under alkaline conditions, while HER shows poor kinetic performance under alkaline conditions, which prevents the water splitting from scale-up applications. Therefore, in this paper, non-noble metal-based catalyst of Ni3S2@MoO3@Co3O4@AMO/NF was prepared by a two-step hydrothermal method followed by a galvanic replacement reaction with morphological characterization, demonstrating that the synthesized material has a core–shell structure. The electrochemical properties of Ni3S2@MoO3@Co3O4@AMO/NF were tested and analyzed, which confirmed its efficient electrocatalytic activity. The catalyst exhibited excellent OER in 1 M KOH solution, and a low overpotential of 248 mV was achieved at a current density of 10 mA cm−2. In addition, the catalyst maintained competitively low overpotentials even at high current densities, 281 mV and 303 mV at 50 mA cm−2 and 100 mA cm−2, respectively. Remarkably, only an overpotential of 185 mV was required to reach the current density of 10 mA cm−2 for HER. The excellent OER and HER performances could be attributed to the synergistic effects among AMO, Co3O4 and MoO3. In addition, Ni3S2@MoO3@Co3O4@AMO/NF required only 1.414 V at 10 mA cm−2 to complete the overall water splitting and exhibited excellent competitiveness also at high current densities (1.769 V and 1.975 V at 50 mA cm−2 and 100 mA cm−2, respectively). The morphology of Ni3S2@MoO3@Co3O4@AMO remained stable after long time i-t tests, which proved its long-term operational stability. The Faraday efficiencies of the OER and HER could reach 75.92% and 97.51%, respectively, which showed excellent electrocatalytic performance. Therefore, the synthesis of high-performance bifunctional catalysts based on a two-step hydrothermal reaction followed by a galvanic replacement reaction proposed in this study provides a new strategy for the simple and efficient synthesis of non-noble metal-based catalysts for high-performance overall water splitting.https://doi.org/10.1186/s11671-025-04283-xNi3S2@MoO3@Co3O4@AMO/NFOERHERWater splittingAlkaline solution |
| spellingShingle | Jiabang Liang Yu Liu Zegao Wang Yifan Jia Zhao Ding Liangjuan Gao Ni3S2@MoO3@Co3O4@AMO/NF core–shell heterostructure for high performance alkaline overall water splitting Discover Nano Ni3S2@MoO3@Co3O4@AMO/NF OER HER Water splitting Alkaline solution |
| title | Ni3S2@MoO3@Co3O4@AMO/NF core–shell heterostructure for high performance alkaline overall water splitting |
| title_full | Ni3S2@MoO3@Co3O4@AMO/NF core–shell heterostructure for high performance alkaline overall water splitting |
| title_fullStr | Ni3S2@MoO3@Co3O4@AMO/NF core–shell heterostructure for high performance alkaline overall water splitting |
| title_full_unstemmed | Ni3S2@MoO3@Co3O4@AMO/NF core–shell heterostructure for high performance alkaline overall water splitting |
| title_short | Ni3S2@MoO3@Co3O4@AMO/NF core–shell heterostructure for high performance alkaline overall water splitting |
| title_sort | ni3s2 moo3 co3o4 amo nf core shell heterostructure for high performance alkaline overall water splitting |
| topic | Ni3S2@MoO3@Co3O4@AMO/NF OER HER Water splitting Alkaline solution |
| url | https://doi.org/10.1186/s11671-025-04283-x |
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