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首页> 外文期刊>Advanced Functional Materials >Disordered Atomic Packing Structure of Metallic Glass: Toward Ultrafast Hydroxyl Radicals Production Rate and Strong Electron Transfer Ability in Catalytic Performance
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Disordered Atomic Packing Structure of Metallic Glass: Toward Ultrafast Hydroxyl Radicals Production Rate and Strong Electron Transfer Ability in Catalytic Performance

机译：金属玻璃的无序原子堆积结构：追求超快的羟基自由基的产生速度和强的电子转移能力

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摘要

Developing new functional applications of metallic glasses in catalysis is an active and pivotal topic for materials science as well as novel environmental catalysis processes. Compared to the crystalline materials with highly ordered atomic packing, metallic glass has a simply disordered atomic structure. Recent reports have demonstrated that the metallic glasses are indeed having many superiorly catalytic properties, yet the understanding of the mechanism is insufficient. In this work, the structural relaxation (alpha-relaxation) by annealing in an amorphous Fe78Si9B13 alloy is studied for unraveling the catalytic mechanism at the atomic scale. The volume fractions of the crystalline structures, such as alpha-Fe, Fe2Si, and Fe2B, in the as-received and annealed metallic glasses are fully characterized. It is found that the randomly atomic packing structure with weak atomic bonding in the as-received metallic glass has an efficient electron transfer capability, presenting advanced superiorities in the aspects of production rate of hydroxyl radicals (center dot OH), dye degradation rate (k), and essential degradation ability (K-SA) for water treatment. The discovery of this critically important work unveils why using metallic glasses as catalysts has higher reactivity than the crystalline materials, and more importantly, it provides new research opportunities into the study of synthetic catalysts.
机译：开发金属玻璃在催化中的新功能应用是材料科学以及新型环境催化过程中一个活跃而关键的主题。与具有高度有序原子堆积的晶体材料相比，金属玻璃具有简单的无序原子结构。最近的报道表明，金属玻璃确实具有许多优越的催化性能，但是对机理的理解还不够。在这项工作中，研究了通过退火在非晶态Fe78Si9B13合金中进行的结构弛豫（α弛豫），以揭示原子尺度上的催化机理。在接收和退火的金属玻璃中，充分表征了晶体结构（例如α-Fe，Fe2Si和Fe2B）的体积分数。发现在原样的金属玻璃中具有弱原子键合的无规原子堆积结构具有有效的电子转移能力，在羟基自由基的产生率（中心点OH），染料降解率（k）方面具有先进的优势。 ），以及用于水处理的基本降解能力（K-SA）。这项至关重要的工作的发现揭示了为什么使用金属玻璃作为催化剂比结晶材料具有更高的反应性，更重要的是，它为合成催化剂的研究提供了新的研究机会。

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  • 来源
    《Advanced Functional Materials》 |2017年第38期|1702258.1-1702258.9|共9页
  • 作者

    Jia Zhe; Duan Xiaoguang; Qin Peng; Zhang Wenchang; Wang Weimin; Yang Chao; Sun Hongqi; Wang Shaobin; Zhang Lai-Chang;

  • 作者单位

    Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia;

    Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia;

    Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia;

    Environm Protect Adm Jian City, Jian 343000, Jiangxi, Peoples R China;

    Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Shandong, Peoples R China;

    South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Guangdong, Peoples R China;

    Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia;

    Curtin Univ, Dept Chem Engn, GPO Box U1987, Perth, WA 6845, Australia;

    Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    catalysis; electron transfer; hydroxyl radicals; metallic glasses; structural relaxation;

    机译：催化;电子转移;羟基自由基;金属玻璃;结构弛豫;

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