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A scientific infographic showing a 3D model of a carbon-supported structure with colorful atoms, surrounded by holographic screens displaying graphs, microscopic images, and chemical formulas in a lab setting.

A scientific infographic showing a 3D model of a carbon-supported structure with colorful atoms, surrounded by holographic screens displaying graphs, microscopic images, and chemical formulas in a lab setting.

1. 碳载高含量锑单原子可控构筑与界面调控本部分的核心是阐明碳载高含量锑单原子的化学稳定机制，实现高负载锑单原子（>30 wt%）的可控合成，并在此基础上主动调控界面化学构型。为此，我们提出并发展“含锑蒸气-碳捕获”定向合成策略：通过将含锑前驱体与碳源均匀复合，在程序热处理中，使含锑组分原位气化形成活性蒸气，进而被碳基质中预设或原位生成的缺陷位点（如N、O、S掺杂位）选择性化学捕获。该策略利用气相输运的均匀性与缺陷捕获的精准性，目标是实现锑原子的高密度、单分散锚定，并直接形成共价键合的Sb-X-C界面。在此基础上，我们将系统研究碳载体掺杂（N、O、S）与锑源化学态（Sb、Sb₂O₃、Sb₂S₃）两大关键变量，对锑原子负载量及最终界面键合类型的调控规律。利用球差校正电镜（AC-HAADF-STEM）与同步辐射XAFS在原子尺度精确解析锑的分散状态与局域配位环境，结合DFT理论计算阐明其热力学稳定性机制，从而建立从合成参数到界面构型的精准调控方法。 Ver mais

#science #chemistry #infographic

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