Contrasting Effects of Functionalization in Binary and Medium-Entropy MXene Coatings for Corrosion Protection
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866914517888270336 |
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| author | Fayyaz, Aqsa Diaz, Ulises Martin Dai, Jianyu Castaneda, Homero Wu, Chenglin |
| author_facet | Fayyaz, Aqsa Diaz, Ulises Martin Dai, Jianyu Castaneda, Homero Wu, Chenglin |
| contents | Developing scalable and environmentally benign anticorrosion coatings is critical for protecting steel infrastructure in chloride-rich environments. Here, a nacre-inspired multilayer epoxy coating reinforced with four MXene systems is investigated. This architecture forms a dense lamellar network that increases diffusion tortuosity and introduces electroactive surfaces for ion interactions. Electrochemical impedance spectroscopy (EIS) confirms that the multilayer design increases coating resistance from ~103 to ~108 Ohm/cm2. A clear performance hierarchy was observed: P-(TiVCrMo)C3 > O-Ti3C2Tx > O-(TiVCrMo)C3 > P-Ti3C2Tx. Density functional theory (DFT) calculations reveal that P-Ti3C2 strongly adsorbs O2, indicating higher surface reactivity, while oxygen termination stabilizes the surface by partially passivating Ti sites. In contrast, P-(TiVCrMo)C3 exhibits strong adsorption of oxygen-containing species due to its multi-metal electronic structure, promoting the formation of protective oxides. These results highlight the delicate balance of surface chemistry, electronic structure, and compositional entropy in designing next-generation MXene-based anticorrosion coatings for marine and industrial environments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_27114 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Contrasting Effects of Functionalization in Binary and Medium-Entropy MXene Coatings for Corrosion Protection Fayyaz, Aqsa Diaz, Ulises Martin Dai, Jianyu Castaneda, Homero Wu, Chenglin Materials Science Developing scalable and environmentally benign anticorrosion coatings is critical for protecting steel infrastructure in chloride-rich environments. Here, a nacre-inspired multilayer epoxy coating reinforced with four MXene systems is investigated. This architecture forms a dense lamellar network that increases diffusion tortuosity and introduces electroactive surfaces for ion interactions. Electrochemical impedance spectroscopy (EIS) confirms that the multilayer design increases coating resistance from ~103 to ~108 Ohm/cm2. A clear performance hierarchy was observed: P-(TiVCrMo)C3 > O-Ti3C2Tx > O-(TiVCrMo)C3 > P-Ti3C2Tx. Density functional theory (DFT) calculations reveal that P-Ti3C2 strongly adsorbs O2, indicating higher surface reactivity, while oxygen termination stabilizes the surface by partially passivating Ti sites. In contrast, P-(TiVCrMo)C3 exhibits strong adsorption of oxygen-containing species due to its multi-metal electronic structure, promoting the formation of protective oxides. These results highlight the delicate balance of surface chemistry, electronic structure, and compositional entropy in designing next-generation MXene-based anticorrosion coatings for marine and industrial environments. |
| title | Contrasting Effects of Functionalization in Binary and Medium-Entropy MXene Coatings for Corrosion Protection |
| topic | Materials Science |
| url | https://arxiv.org/abs/2604.27114 |