The activities of modified hydrotalcite (HT) with Zn catalysts supported on treated activated carbon (Zn-HT/TAC) were carried out in batch fermentations for their potential enhancement of fermentative hydrogen production. The hybrid catalyst of Zn-HT/TAC was synthesized by the incipient impregnation method. The hydrogen production profiles showed that the initial activity of a combined-function of Zn-HT/TAC and co-addition of Zn-HT and TAC were more active than the individual catalysts with 50% and 85% increment of hydrogen production, as compared to the control, respectively. At the final stage, the maximum hydrogen yield obtained at 8.33 g/L of Zn-HT/TAC was 3.08 mol H-2/mol sucrose with a 26.62% increment as compared to the control. The Zn-HT/TAC deactivated after 360 h with Mg2+ and Zn2+ ions leaching and saturation adsorption. The performance of the resulting hybrid catalyst was observed to be a function of cooperative effects related to the base property of Zn-HT and selective adsorption of TAC. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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