Abstract
Phase transformation of cubic Sm 2O 3 in Sm 2O 3 based catalysts in oxidative methylation of toluene could be prevented by addition of ZnO. The preservation of the c-Sm 2O 3 phase of the catalysts during the oxidative methylation of toluene was correlated with the catalyst stability in terms of product selectivities. A homogeneous interaction for the formation of a stable ZnO modified c-Sm 2O 3 phase was considered.
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