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研究领域工程学化学工程能源和燃烧中的化学和热过程
在甲直接转化为甲醇中的Cu-Erionite结构-活性关系的阐明:一个Operando XAS研究

在甲直接转化为甲醇中的Cu-Erionite结构-活性关系的阐明:一个Operando XAS研究

Jie Zhu ^1,2,3, Vitaly L Sushkevich ², Amy J Knorpp ¹, Mark A Newton ^1,4, Toru Wakihara ^3,5, Tatsuya Okubo ³, Zhendong Liu ^3,5,6, Jeroen A van Bokhoven ^1,2

Jie Zhu ^1,2,3, Vitaly L Sushkevich ², Amy J Knorpp ¹

¹Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, Zurich 8093, Switzerland.
²Center for Energy and Environmental Sciences, Paul Scherrer Institute, Villigen PSI 5232, Switzerland.
³Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
⁴Department of Structure and Dynamics in Catalysis, J. Heyrovsky Institute of Physical Chemistry, Dolejškova 2155/3, Prague 8 182 23, Czech Republic.
⁵Institute of Engineering Innovation, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan.
⁶State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Haidian, Beijing 100084, China.

⁰Institute for Chemical and Bioengineering, ETH Zurich, Vladimir-Prelog-Weg 1, Zurich 8093, Switzerland.

Journal of the American Chemical Society +

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2025年六月20日

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在PubMed上查看摘要

概括

此摘要是机器生成的。

铜交换的化石可以有效地将甲转化为甲醇. 甲醇产量取决于铜种的可还性,由Cu/Al比率控制,优化甲的价值化.

科学领域

催化剂
材料科学
化学工程

背景情况

通过部分氧化到甲醇的甲价值化对于可持续化学至关重要.
与铜交换的化物,特别是Cu-erionite (Cu-ERI),对选择性甲氧化具有前景.
了解结构-活性关系是优化甲醇产量的关键.

研究的目的

调查Cu-ERI石中甲醇产量与铜种之间的关系.
阐明化物组成 (Cu/Al和Si/Al比率) 如何影响甲转化效率.
确定最大限度地从甲中生产甲醇的最佳条件.

主要方法

合成不同组成的Cu-ERI热石.
使用X射线吸收光谱 (XAS) 探测铜种.
福里埃变换红外光谱 (FTIR) 用于监测反应中间体.
光谱数据与甲醇产量之间的相关性分析.

主要成果

甲醇产量直接取决于铜种的减少率.
/比对铜种的可还性和标准化的甲醇产量有重大影响.
Si/Al比率影响总铜负载和最大甲醇产量,但不影响正常产量.
在最佳的Cu/Al比率下增加含量可以提高总甲醇产量.

结论

控制Cu/Al比率对于最大限度地提高铜在甲部分氧化的效率至关重要.
优化Cu/Al和Si/Al的比率对于设计高性能Cu-ERI催化剂至关重要.
这项研究为控制甲转化为甲醇的结构-活性关系提供了宝贵的见解.

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相关概念视频

Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

The illustrated image represents the reaction diagrams for an endothermic chemical process progressing in the absence (red curve) and presence (blue curve) of a catalyst.

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