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Carbon loaded Pd-Cu-Fe catalysts (Pd-Cu-Fe/C) were fabricated with a novel strategy of partly etching carbon loaded tunable binary Cu-Fe alloy templates (Cu9Fe1, Cu8Fe2, Cu7Fe3) with Pd2+. The obtained Pd-Cu-Fe catalysts started from all the three templates showed better performance for formic acid oxidation than Pd and Pt. Compared with Pd/C catalysts, the anodic peak potential at the catalysts started...