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Higher fatty alcohols were synthesized in high yield (>92%) by direct hydrogenation of fatty acids catalyzed by ReOx–Pd/SiO2. High catalytic performance of ReOx–Pd/SiO2 can be generated by the synergy between ReOx and Pd. Preferential adsorption of the carboxylic acid to alcohols prohibited the overreaction of alcohols to alkanes.
Takeda et al. (Sun,) studied this question.