Journal
ACS CATALYSIS
Volume 9, Issue 7, Pages 6243-6251Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.9b01822
Keywords
CO2 hydrogenation; copper; spinel; metal-support interaction; stability
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Funding
- Swiss National Science Foundation [PYAPP2_154281]
- Swiss National Science Foundation (SNF) [PYAPP2_154281] Funding Source: Swiss National Science Foundation (SNF)
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The reverse water gas shift reaction is considered to be a highly attractive catalytic route for CO2 recycling in a future sustainable economy. Copper- based 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.
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