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

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Cu–Al Spinel as a Highly Active and Stable Catalyst for the Reverse Water Gas Shift Reaction
ACS Catalysis ( IF 11.3 ) Pub Date : 2019-06-03 00:00:00 , DOI: 10.1021/acscatal.9b01822
Ali M. Bahmanpour ₁ , Florent Héroguel ₁ , Murat Kılıç ₁ , Christophe J. Baranowski ₁ , Luca Artiglia ₂ , Ursula Röthlisberger ₁ , Jeremy S. Luterbacher ₁ , Oliver Kröcher _{1,

2}

Affiliation

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.

中文翻译：

铜铝尖晶石作为高活性和稳定的逆水煤气变换反应催化剂

在未来的可持续经济中，反向水煤气变换反应被认为是CO ₂再循环的极具吸引力的催化途径。铜基催化剂由于其高活性和选择性而通常用于该反应。但是，它们的低热稳定性对于长期使用是有问题的。在这里，我们介绍了原位形成的表面Cu-Al尖晶石，它是用于逆水煤气变换反应的高活性和稳定的催化剂。即使在高重量的时空速度下（300 000 mL g ^–1 h ^–1），我们也观察不到在运行40 h后可检测到的失活。通过原位DRIFTS和DFT研究，发现2倍配位的铜离子和3倍配位的表面氧原子构成了该反应的活性位点。

更新日期：2019-06-03

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