Advanced hybrid materials with unique properties are essential for addressing the demands of increasingly complex applications. Despite their importance, the self-assembly of layered double hydroxides (LDH) with metallic oxide nanoparticles and dicarboxylic acids is constrained by a limited understanding of the formation mechanisms and difficulties in evaluating their anticorrosive performance. In this study, we developed a novel anticorrosive system by intercalating CeNiLDH with a complex of vanadium pentoxide (V₂O₅) nanoparticles and (2E)‑but-2-enedioic acid ((2E)-BDA) on a MgO layer created through plasma-electrolysis of AZ31 Mg alloy. This system was compared with LDH films intercalated with either V₂O₅ or (2E)-BDA alone. The intercalation of LDH with V₂O₅ and (2E)-BDA resulted in a flower-like structure, while modification with their complex led to a more compact, cloud-like formation. These cloud-like structures, driven by enhanced absorption and robust hydrogen bonding throughout the hierarchical network, effectively suppress corrosion by delaying the movement of corrosive anions. This was reflected in a polarization resistance of 1.51 × 10¹⁰ Ω·cm², which is approximately two orders of magnitude times higher than the resistance of the unmodified LDH film (3.41 × 10⁸ Ω·cm²). Additionally, the corrosion current density (i_corr) of the VOBDA sample showed a decrease by four orders of magnitude compared to the unmodified LDH sample, emphasizing the superior anticorrosive performance of this hybrid coating. Density functional theory (DFT) was used to elucidate the bonding and formation mechanisms between LDH and the inorganic-organic complex.

中文翻译：

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通过与 V₂O₅ 纳米颗粒和 （2E）-But-2-烯二酸络合的 CeNiLDH 对等离子体电解 MgO 进行高级改性，开发高效的防腐系统


具有独特性能的先进混合材料对于满足日益复杂的应用需求至关重要。尽管它们很重要，但层状双氢氧化物 （LDH） 与金属氧化物纳米颗粒和二羧酸的自组装受到对形成机制的有限理解和评估其防腐性能困难的限制。在这项研究中，我们通过将 CeNiLDH 与五氧化二钒 （V₂O₅） 纳米颗粒和 （2E）-but-2-烯二酸 （（2E）-BDA） 的复合物嵌入到通过 AZ31 Mg 合金等离子电解形成的 MgO 层上，开发了一种新型防腐系统。将该系统与单独嵌入 V₂O₅ 或 （2E）-BDA 的 LDH 薄膜进行了比较。LDH 与 V₂O₅ 和 （2E）-BDA 的嵌入导致花状结构，而对其复合物的修饰导致更紧凑的云状形成。这些云状结构由整个分层网络中的增强吸收和强大的氢键驱动，通过延迟腐蚀性阴离子的运动来有效抑制腐蚀。这反映在 1.51 × 10¹⁰ Ω·cm² 的极化电阻上，这大约是未改性 LDH 薄膜电阻（3.41 × 10⁸ Ω·cm²）的两倍数量级。此外，与未改性的 LDH 样品相比，VOBDA 样品的腐蚀电流密度 （i_corr） 降低了四个数量级，强调了这种混合涂层的卓越防腐性能。密度泛函理论 （DFT） 用于阐明 LDH 与无机-有机复合物之间的键合和形成机制。