In Situ Monitoring of Heterogeneous Catalytic Hydrogenation via 129 Xe NMR Spectroscopy and Proton MRI
In Situ Monitoring of Heterogeneous Catalytic Hydrogenation via 129 Xe NMR Spectroscopy and Proton MRI
复制标题
通过 129 Xe NMR 光谱和质子 MRI 原位监测多相催化氢化
DOI：
10.1021/acscatal.9b05000
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发表时间：
2019
期刊：
影响因子：
12.9
通讯作者：
Burueva D
中科院分区：
文献类型：
--
作者：
Burueva D
在惰性气体的自旋交换光泵浦中使用分子氢H2作为缓冲气体的能力使得能够产生含有低百分位数（5%）的超极化（HP）129氘的氢气作为氢化反应的原位NMR光谱的示踪剂。它表明，氙的化学位移，观察到的含铂的氧化铝颗粒的多孔空间中，可以用来监测温度的变化下迅速进展，非稳态条件下启动的催化反应。标准质子磁共振成像成功地应用于提供在这项工作中使用的催化剂的转化率的原位评价。
The ability to use molecular hydrogen, H2, as a buffer gas in spin exchange optical pumping of noble gases enables the production of hydrogen gas containing a low percentile (5%) of hyperpolarized (HP)129Xe as a tracer for in situ NMR spectroscopy of hydrogenation reactions. It is demonstrated that the xenon chemical shift, observed in the porous space of Pt-containing alumina pellets, can be used to monitor the temperature changes under rapidly progressing, nonsteady-state conditions during start-up of the catalytic reaction. Standard proton MR imaging was successfully applied to provide in situ evaluation of conversion for the catalyst used in this work.