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La-modified ZrO2 with 10 mol% La was prepared by three different methods, namely co-precipitation, impregnation, and mechanical mixing and employed as cobalt catalyst supports. The use of La-modified ZrO2 prepared by mechanical mixing resulted in higher cobalt dispersion and higher CO hydrogenation activity than those supported on pure oxide (La2O3 and ZrO2) and La-modified ZrO2 obtained by the other...