Journal
CHEMCATCHEM
Volume 12, Issue 3, Pages 675-688Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201901639
Keywords
reaction mechanism; structure-activity relation; heterogeneous catalysis; reaction intermediates; in-situ characterizations
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Funding
- National Key R&D Program of Ministry of Science and Technology of China [2017YFB0602205]
- National Natural Science Foundation of China [21525313, 91745202, 21703227]
- Chinese Academy of Sciences
- Changjiang Scholars Program of Ministry of Education of China
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Heterogeneous catalytic reactions always involve surface intermediates on catalyst surfaces, and some of them also involve reactive and unstable gas-phase intermediates such as radicals and alkyl hydroperoxides. Online detection of these gas-phase intermediates is of great importance for fundamentally understanding reaction mechanisms of relevant heterogeneous catalytic reactions, designing structures of efficient catalysts and optimizing reactors. However, it has remained a long-time challenge due to the lack of routine characterization techniques. Herein we review recent progress on applications of photoionization mass spectrometry in online detection of reactive and unstable gas-phase intermediates in heterogeneous catalytic reactions. The development and advantages of photoionization mass spectrometry and the relevant equipment setup for heterogeneous catalysis studies are also described. Finally, a future perspective is given.
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