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The active sites of Cu–ZnO catalysts for water gas shift and CO hydrogenation reactions
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Journal Article
The active sites of Cu–ZnO catalysts for water gas shift and CO hydrogenation reactions
2021
Overview
Cu–ZnO–Al
2
O
3
catalysts are used as the industrial catalysts for water gas shift (WGS) and CO hydrogenation to methanol reactions. Herein, via a comprehensive experimental and theoretical calculation study of a series of ZnO/Cu nanocrystals inverse catalysts with well-defined Cu structures, we report that the ZnO–Cu catalysts undergo Cu structure-dependent and reaction-sensitive in situ restructuring during WGS and CO hydrogenation reactions under typical reaction conditions, forming the active sites of Cu
Cu(100)
-hydroxylated ZnO ensemble and Cu
Cu(611)
Zn alloy, respectively. These results provide insights into the active sites of Cu–ZnO catalysts for the WGS and CO hydrogenation reactions and reveal the Cu structural effects, and offer the feasible guideline for optimizing the structures of Cu–ZnO–Al
2
O
3
catalysts.
Identification of active sites of a catalyst is the Holy Grail in heterogeneous catalysis. Here, the authors successfully identify the Cu
Cu(100)
- hydroxylated ZnO ensemble and Cu
Cu(611)
Zn alloy as the active sites of Cu-ZnO catalysts for water gas shift and CO hydrogenation reactions, respectively.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
