Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture
Due to the growing demand for clean and renewable hydrogen fuel, there has been a surge of interest in electrocatalytic water-splitting devices driven by renewable energy sources. However, the feasibility of self-driven water splitting is limited by inefficient connections between functional modules...
| Hlavní autoři: | , , , , , , , , , |
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| Médium: | Journal Article |
| Jazyk: | English |
| Vydáno: |
2022
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| On-line přístup: | https://hdl.handle.net/10356/162432 |
| _version_ | 1826111985640538112 |
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| author | Sun, Zixu Sun, Lijuan Koh, See Wee Ge, Junyu Fei, Jipeng Yao, Mengqi Hong, Wei Liu, Shude Yamauchi, Yusuke Li, Hong |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Sun, Zixu Sun, Lijuan Koh, See Wee Ge, Junyu Fei, Jipeng Yao, Mengqi Hong, Wei Liu, Shude Yamauchi, Yusuke Li, Hong |
| author_sort | Sun, Zixu |
| collection | NTU |
| description | Due to the growing demand for clean and renewable hydrogen fuel, there has been a surge of interest in electrocatalytic water-splitting devices driven by renewable energy sources. However, the feasibility of self-driven water splitting is limited by inefficient connections between functional modules, lack of highly active and stable electrocatalysts, and intermittent and unpredictable renewable energy supply. Herein, we construct a dual-modulated three-dimensional (3D) NiCo2O4@NiCo2S4 (denoted as NCONCS) heterostructure deposited on nickel foam as a multifunctional electrode for electrocatalytic water splitting driven by photovoltaic-powered supercapacitors. Due to a stable 3D architecture configuration, abundant active sites, efficient charge transfer, and tuned interface properties, the NCONCS delivers a high specific capacity and rate performance for supercapacitors. A two-electrode electrolyzer assembled with the NCONCS as both the anode and the cathode only requires a low cell voltage of 1.47 V to achieve a current density of 10 mA cm−2 in alkaline electrolyte, which outperforms the state-of-the-art bifunctional electrocatalysts. Theoretical calculations suggest that the generated heterointerfaces in NCONCS improve the surface binding capability of reaction intermediates while regulating the local electronic structures, which thus accelerates the reaction kinetics of water electrolysis. As a proof of concept, an integrated configuration comprising a two-electrode electrolyzer driven by two series-connected supercapacitors charged by a solar cell delivers a high product yield with superior durability. |
| first_indexed | 2024-10-01T02:59:41Z |
| format | Journal Article |
| id | ntu-10356/162432 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:59:41Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1624322022-10-19T01:20:32Z Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture Sun, Zixu Sun, Lijuan Koh, See Wee Ge, Junyu Fei, Jipeng Yao, Mengqi Hong, Wei Liu, Shude Yamauchi, Yusuke Li, Hong School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Hybrid Energy Systems Interface Engineering Due to the growing demand for clean and renewable hydrogen fuel, there has been a surge of interest in electrocatalytic water-splitting devices driven by renewable energy sources. However, the feasibility of self-driven water splitting is limited by inefficient connections between functional modules, lack of highly active and stable electrocatalysts, and intermittent and unpredictable renewable energy supply. Herein, we construct a dual-modulated three-dimensional (3D) NiCo2O4@NiCo2S4 (denoted as NCONCS) heterostructure deposited on nickel foam as a multifunctional electrode for electrocatalytic water splitting driven by photovoltaic-powered supercapacitors. Due to a stable 3D architecture configuration, abundant active sites, efficient charge transfer, and tuned interface properties, the NCONCS delivers a high specific capacity and rate performance for supercapacitors. A two-electrode electrolyzer assembled with the NCONCS as both the anode and the cathode only requires a low cell voltage of 1.47 V to achieve a current density of 10 mA cm−2 in alkaline electrolyte, which outperforms the state-of-the-art bifunctional electrocatalysts. Theoretical calculations suggest that the generated heterointerfaces in NCONCS improve the surface binding capability of reaction intermediates while regulating the local electronic structures, which thus accelerates the reaction kinetics of water electrolysis. As a proof of concept, an integrated configuration comprising a two-electrode electrolyzer driven by two series-connected supercapacitors charged by a solar cell delivers a high product yield with superior durability. Ministry of Education (MOE) Nanyang Technological University Published version This study was supported by a NAP award (M408050000) from Nanyang Technological University and the Singapore Ministry of Education Tier 1 program (2018‐T1‐001‐051). This study was also supported by the JST‐ERATO Yamauchi Materials Space‐Tectonics Project (JPMJER2003). 2022-10-19T01:20:32Z 2022-10-19T01:20:32Z 2022 Journal Article Sun, Z., Sun, L., Koh, S. W., Ge, J., Fei, J., Yao, M., Hong, W., Liu, S., Yamauchi, Y. & Li, H. (2022). Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture. Carbon Energy, 1-12. https://dx.doi.org/10.1002/cey2.213 2637-9368 https://hdl.handle.net/10356/162432 10.1002/cey2.213 2-s2.0-85131170831 1 12 en M408050000 2018-T1-001-051 Carbon Energy © 2022 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Hybrid Energy Systems Interface Engineering Sun, Zixu Sun, Lijuan Koh, See Wee Ge, Junyu Fei, Jipeng Yao, Mengqi Hong, Wei Liu, Shude Yamauchi, Yusuke Li, Hong Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture |
| title | Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture |
| title_full | Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture |
| title_fullStr | Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture |
| title_full_unstemmed | Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture |
| title_short | Photovoltaic-powered supercapacitors for driving overall water splitting: a dual-modulated 3D architecture |
| title_sort | photovoltaic powered supercapacitors for driving overall water splitting a dual modulated 3d architecture |
| topic | Engineering::Mechanical engineering Hybrid Energy Systems Interface Engineering |
| url | https://hdl.handle.net/10356/162432 |
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