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Gas-Dependent Active Sites on Cu/ZnO Clusters for CH3OH Synthesis
Weifeng Tu1, Pengchao Ren1, Yuanjie Li1
1Engineering Research Center of Advanced Functional Material Manufacturing, Ministry of Education, Zhengzhou University, Zhengzhou 450001, China.
Abstract:
This study describes an instantaneously gas-induced dynamic transition of an industrial Cu/ZnO/Al2O3 catalyst. Cu/ZnO clusters become "alive" and lead to a promotion in reaction rate by almost one magnitude, in response to the variation of the reactant components. The promotional changes are functions of either CO2-to-CO or H2O-to-H2 ratio which determines the oxygen chemical potential thus drives Cu/ZnO clusters to undergo reconstruction and allows the maximum formation of Cu-Zn2+ sites for CH3OH synthesis.
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