Rapid-Scan Operando Infrared Spectroscopy

Arantxa Davó-Quiñonero, Agustín Bueno-López*, Dolores Lozano-Castelló, Alan J. McCue, James A. Anderson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Novel methodology, referred to as rapid-scan operando, has been demonstrated to be a highly powerful tool for studying reaction mechanisms in heterogeneous catalysis, because it combines rapid scan for IR monitoring in the milliseconds time frame and operando methodology. As proof of concept, the NOx–CO and NOx–H2 reactions were studied as model catalyzed reactions with practical interest for removal of NOx in diesel exhausts. Rapid-scan operando experiments confirmed state-of-the-art knowledge concerning the reaction mechanisms and, more importantly, allowed us to elucidate, for the first time, the different roles of the surface hydroxy groups depending on the reductant used (CO or H2). Moreover, this new tool was used to distinguish the behavior of carbonates and nitrites under reaction conditions that could not be monitored by conventional IR spectroscopy approaches owing to overlap of their absorbance bands.

Original languageEnglish
Pages (from-to)1905-1908
Number of pages4
Issue number11
Early online date19 May 2016
Publication statusPublished - 7 Jun 2016

Bibliographical note

Financial support from Generalitat Valenciana (Project PROMETEOII/2014/010 and grant BEST/2014/250), Spanish Ministry of Economy and Competitiveness (Projects CTQ2012–30703 and MAT2014–61992-EXP, and grant PRX14/00249), and the European Union (FEDER funding).


  • heterogeneous catalysis
  • IR spectroscopy
  • operando
  • rapid scan
  • reaction mechanisms


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