Continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansion
Abstract Compressive strain, downshifting the d-band center of transition metal oxides, is an effective way to accelerate the sluggish kinetics of oxygen evolution reaction (OER) for water electrolysis. Here, we find that anisotropic thermal expansion can produce compressive strains of the IrO6 octa...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-02-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-46216-9 |
| _version_ | 1811153603325329408 |
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| author | Yu Du Fakang Xie Mengfei Lu Rongxian Lv Wangxi Liu Yuandong Yan Shicheng Yan Zhigang Zou |
| author_facet | Yu Du Fakang Xie Mengfei Lu Rongxian Lv Wangxi Liu Yuandong Yan Shicheng Yan Zhigang Zou |
| author_sort | Yu Du |
| collection | DOAJ |
| description | Abstract Compressive strain, downshifting the d-band center of transition metal oxides, is an effective way to accelerate the sluggish kinetics of oxygen evolution reaction (OER) for water electrolysis. Here, we find that anisotropic thermal expansion can produce compressive strains of the IrO6 octahedron in Sr2IrO4 catalyst, thus downshifting its d-band center. Different from the previous strategies to create constant strains in the crystals, the thermal-triggered compressive strains can be real-timely tuned by varying temperature. As a result of the thermal strain accelerating OER kinetics, the Sr2IrO4 exhibits the nonlinear lnj o - T −1 (j o, exchange current density; T, absolute temperature) Arrhenius relationship, resulting from the thermally induced low-barrier electron transfer in the presence of thermal compressive strains. Our results verify that the thermal field can be utilized to manipulate the electronic states of Sr2IrO4 via thermal compressive strains downshifting the d-band center, significantly accelerating the OER kinetics, beyond the traditional thermal diffusion effects. |
| first_indexed | 2024-03-07T14:51:32Z |
| format | Article |
| id | doaj.art-6ceb5115f49e46b08d727e1374ff1097 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-07T14:51:32Z |
| publishDate | 2024-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-6ceb5115f49e46b08d727e1374ff10972024-03-05T19:41:51ZengNature PortfolioNature Communications2041-17232024-02-0115111110.1038/s41467-024-46216-9Continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansionYu Du0Fakang Xie1Mengfei Lu2Rongxian Lv3Wangxi Liu4Yuandong Yan5Shicheng Yan6Zhigang Zou7Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Eco-materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing UniversityCollaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Eco-materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing UniversityCollaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Eco-materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing UniversityIndustrial Center, Nanjing Institute of TechnologyCollaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Eco-materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing UniversityCollaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Eco-materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing UniversityCollaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Eco-materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing UniversityCollaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Eco-materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing UniversityAbstract Compressive strain, downshifting the d-band center of transition metal oxides, is an effective way to accelerate the sluggish kinetics of oxygen evolution reaction (OER) for water electrolysis. Here, we find that anisotropic thermal expansion can produce compressive strains of the IrO6 octahedron in Sr2IrO4 catalyst, thus downshifting its d-band center. Different from the previous strategies to create constant strains in the crystals, the thermal-triggered compressive strains can be real-timely tuned by varying temperature. As a result of the thermal strain accelerating OER kinetics, the Sr2IrO4 exhibits the nonlinear lnj o - T −1 (j o, exchange current density; T, absolute temperature) Arrhenius relationship, resulting from the thermally induced low-barrier electron transfer in the presence of thermal compressive strains. Our results verify that the thermal field can be utilized to manipulate the electronic states of Sr2IrO4 via thermal compressive strains downshifting the d-band center, significantly accelerating the OER kinetics, beyond the traditional thermal diffusion effects.https://doi.org/10.1038/s41467-024-46216-9 |
| spellingShingle | Yu Du Fakang Xie Mengfei Lu Rongxian Lv Wangxi Liu Yuandong Yan Shicheng Yan Zhigang Zou Continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansion Nature Communications |
| title | Continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansion |
| title_full | Continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansion |
| title_fullStr | Continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansion |
| title_full_unstemmed | Continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansion |
| title_short | Continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansion |
| title_sort | continuous strain tuning of oxygen evolution catalysts with anisotropic thermal expansion |
| url | https://doi.org/10.1038/s41467-024-46216-9 |
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