Rational modulation of the Cu-ZnO interfaces by modifying Layered Double Hydrotalcite (LDH) with additives the provides a promising way for enhanced methanol production from CO 2 , while the extent to which the promoters contribute to the topological transformation process of LDH and the reaction pathway remains unexplored. Herein, a LDH-derived CuZnAl catalyst with manganese (Mn) promoter modification is designed for efficient CO 2 -to-methanol production. Compared with amorphous catalysts, at 260°C and 5MPa, the as-optimized CuZnAlMn-LDO exhibits a CO 2 conversion of 23.03% with a STY MeOH of 584.15 g MeOH ·kg cat -1 ·h -1 . Characterizations conform that the introduction of Mn content directly involves in the formation of LDH and boost the thermal stability of the LDH morphology, resulting in the reservation of LDH nanosheet structure with lower thickness and higher surface area after calcination. These modifications effectively trigger stronger electron transfer and boost the formation of Cu-ZnO interfaces for enhanced CO 2 adsorption. Moreover, smaller and more dispersed Cu species were also observed on CuZnAlMn-LDO, effectively facilitating H 2 dissociation. In-situ tests further demonstrate that the formation of formate and its further hydrogenation are accelerated. This work highlights that tuning the topological transformation of LDH structure could effectively regulate metal-support interaction to enrich Cu-ZnO interfaces for enhanced performances. Schematic of tuning Cu-ZnO interfaces on LDH-derived CuZnAl catalyst with Mn doping for efficient CO 2 hydrogenation to methanol • LDH-derived CuZnAl catalysts with Manganese modification was synthesized. • Enriching Cu-ZnO interfaces. • Tuning the topological transformation of the LDH structure. • Accelerating the formation and the hydrogenation of formate at Cu-ZnO interface. • Realizing a CO 2 conversion of 23.03% with a STY MeOH of 584.15 g MeOH kg cat -1 h -1 .
Zhang et al. (2026) studied this question.