Catalysis Letters

, Volume 68, Issue 1–2, pp 45–48 | Cite as

Mechanism of CO formation in reverse water–gas shift reaction over Cu/Al2O3 catalyst

  • Ching-Shiun Chen
  • Wu-Hsun Cheng
  • Shou-Shiun Lin


The mechanism of the reverse water–gas shift reaction over a Cu catalyst was studied by CO2 hydrogenation, temperature-programmed reduction of the Cu catalyst and pulse reaction with QMS monitoring. In comparison with the reaction of CO2 alone, hydrogen can significantly promote the CO formation in the RWGS reaction. The formate derived from association of H2 and CO2 is proposed to be the key intermediate for CO production. Formate dissociation mechanism is the major reaction route for CO production. Cu(I) species were formed from the oxidation of Cu0 associated with CO2 dissociation.

reverse water–gas shift temperature-programmed reduction copper catalysts formate mechanism 


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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Ching-Shiun Chen
    • 1
  • Wu-Hsun Cheng
    • 1
  • Shou-Shiun Lin
    • 1
  1. 1.Department of Chemical and Materials EngineeringChang Gung UniversityTao-YuanTaiwan, ROC

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