Abstract :
The method of doping trivalent metal ions into a copper-based catalyst for methanol synthesis is effective in modifying
the surface structure of the catalyst. The promotion effect and its relation to catalytic activity for hydrogenation of CO to
methanol after doping with trivalent metal ions such as Al3q, Sc3q, and Cr3q into Cu–ZnO have been investigated by
XRD, ESR, XPS, TPR, and the evaluation of catalytic activity. The results show that doping trivalent metal ions into ZnO
assists in the formation of monovalent cationic defects on the surface of ZnO. These monovalent cationic defects both enrich
and stabilize monovalent copper on the surface of copper-based catalysts for methanol synthesis during reduction and
reaction. They increase catalytic activity for methanol synthesis and extend the life of catalysts. q1999 Elsevier Science
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