Trapping the catalyst working state by amber-inspired hybrid material to reveal the cobalt nanostructure evolution in clean liquid fuel synthesis
Trapping the catalyst working state by amber-inspired hybrid material to reveal the cobalt nanostructure evolution in clean liquid fuel synthesis
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DOI：
10.1039/c3cy00366c
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发表时间：
2013-09
影响因子：
5
通讯作者：
Bingbing Zhang;Haiquan Su;Xiaojun Gu;Yulong Zhang;Pengzhan Wang;Xuefen Li;Xiaohong Zhang;Huimin Wang;Xuzhuang Yang;S. Zeng
中科院分区：
文献类型：
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作者：
Bingbing Zhang;Haiquan Su;Xiaojun Gu;Yulong Zhang;Pengzhan Wang;Xuefen Li;Xiaohong Zhang;Huimin Wang;Xuzhuang Yang;S. Zeng
在实际工作条件下，对催化剂在反应过程中的任何状态进行表征，一直是催化领域科学家们长期的梦想。设计了一种琥珀型杂化材料，用于捕获钴基费托合成（FTS）反应过程中产生的催化剂工作状态，使现有的非原位表征技术无法获得催化清洁液体燃料合成过程的信息。捕获态被用来研究空气敏感活性物种的纳米结构演化。在实验中，有机改性剂的薄膜锚定在蒙脱土（MMT）载体上的设计，以防止在催化反应过程中产生的活性Co组分和相被氧化时，他们暴露在空气中。首次揭示了反应过程中活性物种的变化，如e-Co向hcp Co和e-Co向fcc Co的相变、Co纳米颗粒的生长、反应过程中的再氧化以及FTS催化剂的结构与性能的关系。
It has been a long-term dream for scientists working in the field of catalysis to characterize the catalyst details at any state during the course of reaction under actual working conditions. Here, an amber-inspired hybrid material was designed to trap the catalyst working state generated during the reaction process of cobalt-based Fischer–Tropsch synthesis (FTS), which made the unavailable information for the catalytic clean liquid fuel synthesis processes obtainable via current ex situ characterization techniques. The trapped states were used to study the nanostructure evolution of the air-sensitive active species. In the experiments, the thin films of organic modifier anchored onto the montmorillonite (MMT) supports were designed to prevent the active Co components and phases generated during catalytic reaction from being oxidized when they are exposed to air. Consequently, the changes of the active species such as e-Co to hcp Co and e-Co to fcc Co phase transformation, Co nanoparticle growth, reoxidation during reaction, and the structure–property relationship of FTS catalysts were revealed clearly for the first time.