Highly dispersed Pd nanoparticles supported on dendritic mesoporous CeZrZnOx for efficient CO2 hydrogenation to methanol

•Novel Pd2.0/CZZ catalyst with dendritic morphology and highly dispersed Pd was prepared.•Dendritic morphology of Pd2.0/CZZ increase the accessibility of the reactants to the active sites.•Zn2+ cation along with Ce3+ on Pd2.0/CZZ is conducive to the generation of more oxygen vacancies.•Pd2.0/CZZ presents superior CO2 hydrogenation performance and excellent 100 h long-term stability.•Pd2.0/CZZ promote the pathway to *HCOO and *CH3O, two main intermediates of CO2 hydrogenation to MeOH.