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<p>High‐performance electromagnetic wave (EMW) absorbers with environmental adaptability are essential for advanced maritime stealth and electromagnetic protection. Herein, we design a synergistic absorber integrating Fe clusters (Fe<sub>AC</sub>) and single atoms (Fe<sub>SA</sub>) to tackle the issue of EMW attenuation under high-salinity and humidity marine conditions. First-principles calculations and experiments reveal that Fe<sub>AC</sub> and Fe<sub>SA</sub> anchored on a <i>π</i>‐conjugated carbon support form a delocalized electronic space that enables long-range electronic interactions and multicenter synergistic coupling. This electronic synergy markedly strengthens conduction loss and dipolar polarization, delivering a minimum reflection loss of − 68.78&#xa0;dB and an effective absorption bandwidth of 6.00&#xa0;GHz at a low loading of 6&#xa0;wt%. Notably, Fe<sub>AC</sub> exhibits a thermodynamically preferred adsorption toward Cl<sup>−</sup>, generating locally enriched negative‐charge regions that mitigate direct ionic attack on atomically dispersed Fe<sub>SA</sub> sites and thereby suppress corrosion-induced performance degradation. In addition, the absorber film demonstrates mechanical flexibility and thermal insulation, highlighting its potential for durable and high‐efficiency maritime EMW protection applications.</p>

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Electronic Delocalization of Fe Atom–Cluster for Long-Term Stable Electromagnetic Wave Absorption in Marine Environments

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月11日

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  • Shaocong Zhong,
  • Xinyu Wang,
  • Rurong Zou,
  • Chang Long,
  • Pianpian Zhang,
  • Xueting Zhang,
  • Zihao Zhao,
  • Ying Liu,
  • Can Cui,
  • Yanan Yang,
  • Long Xia

摘要

High‐performance electromagnetic wave (EMW) absorbers with environmental adaptability are essential for advanced maritime stealth and electromagnetic protection. Herein, we design a synergistic absorber integrating Fe clusters (FeAC) and single atoms (FeSA) to tackle the issue of EMW attenuation under high-salinity and humidity marine conditions. First-principles calculations and experiments reveal that FeAC and FeSA anchored on a π‐conjugated carbon support form a delocalized electronic space that enables long-range electronic interactions and multicenter synergistic coupling. This electronic synergy markedly strengthens conduction loss and dipolar polarization, delivering a minimum reflection loss of − 68.78 dB and an effective absorption bandwidth of 6.00 GHz at a low loading of 6 wt%. Notably, FeAC exhibits a thermodynamically preferred adsorption toward Cl−, generating locally enriched negative‐charge regions that mitigate direct ionic attack on atomically dispersed FeSA sites and thereby suppress corrosion-induced performance degradation. In addition, the absorber film demonstrates mechanical flexibility and thermal insulation, highlighting its potential for durable and high‐efficiency maritime EMW protection applications.