Cu–Al Spinel as a Highly Active and Stable Catalyst for the Reverse Water Gas Shift Reaction

The reverse water gas shift reaction is considered to be a highly attractive catalytic route for CO2 recycling in a future sustainable economy. Copperbased catalysts are commonly used for this reaction due to their high activity and selectivity. However, their low thermal stability is problematic for long-term usage. Here, we introduce an in situ formed surface Cu−Al spinel as a highly active and stable catalyst for the reverse water gas shift reaction. Even at high weight hourly space velocities (300 000 mL g−1 h−1 ), we observed no detectable deactivation after 40 h of operation. Through in situ DRIFTS and DFT studies, it was found that 2-fold coordinated copper ions and 3-fold coordinated surface oxygen atoms constitute the active sites for this reaction.


Published in:
ACS Catalysis, 9, 7, 6243-6251
Year:
Jun 03 2019
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 Record created 2019-07-10, last modified 2019-07-12

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