光催化甲醇重整机理的原位核磁共振研究

doi:10.11938/cjmr20182680

摘要/Abstract

摘要： 本文利用原位核磁共振技术在真实固液反应环境中对光催化甲醇重整过程进行了研究.研究发现，体系中甲醇重整的液态中间产物主要有四种：HOCH₂OH、CH₃OCH₂OH、HCOOH和HCOOCH₃.不同晶型的二氧化钛催化剂会影响这四种产物的生成趋势.随光照时间的增加，上述四种产物的含量均会增加.Pd负载对一级中间产物CH₃OCH₂OH和HOCH₂OH的产率影响较大，其产率为无Pd负载的2~3个数量级；对二级中间产物HCOOCH₃和HCOOH的产率影响较小.

关键词: 原位核磁共振, 甲醇重整, 光催化, 液体核磁共振

Abstract: The reaction of photocatalytic methanol reforming in a real solid-liquid reaction environment was studied by in operando nuclear magnetic resonance (NMR) spectroscopy. Four liquid-state intermediate products were detected in the reaction systems investigated, including HOCH₂OH, CH₃OCH₂OH, HCOOH and HCOOCH₃. It was also demonstrated that the crystal types of TiO₂ catalysts had a strong influence on the production of the four intermediate products. And the contents of the four products increased with the increasing illumination time. Palladium (Pd) loading enhanced the production of CH₃OCH₂OH and HOCH₂OH by 2~3 orders of magnitude, but had little effects on the production of HCOOCH₃ and HCOOH.

Key words: in operando NMR, methanol reforming, photocatalytic, liquid-state NMR

中图分类号:

O482.53

刘文卿, 宋艳红, 王雪璐, 姚叶锋. 光催化甲醇重整机理的原位核磁共振研究[J]. 波谱学杂志, 2019, 36(3): 298-308.

LIU Wen-qing, SONG Yan-hong, WANG Xue-lu, YAO Ye-feng. In Operando Nuclear Magnetic Resonance Spectroscopy Study on Photocatalytic Methanol Reforming[J]. Chinese Journal of Magnetic Resonance, 2019, 36(3): 298-308.

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