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MG has a special molecular structure, and MG is an important chemical intermediate with promising applications. Ag−Ce/ZrO2 catalysts with different contents were prepared for hydrogenation of DMO to MG by equal volume impregnation. The content of Ag and the type of additives were screened. According to the effects of different additives on the conversion rate of DMO and the selectivity of MG, Ce was finally selected as the optimal additive metal. These were characterized by XRD, XPS, BET, H2‐TPR. The addition of Ce helps the catalyst to form more oxygen vacancies and Ag2O is more easily reduced to Ag monomers. The performance test results of the catalyst showed that the addition of appropriate amount of Ce has a certain promotion effect on the hydrogenation performance of the catalyst, The yield of MG using the 8Ag−Ce1/ZrO2 catalyst was significantly better than that of the Ag/ZrO2 catalyst. [ABSTRACT FROM AUTHOR]

[Display omitted] • Co-Ag x /TiO 2 catalyst with low metal content were synthesized. • Co-Ag 0.7 /TiO 2 catalyst exhibits exceptional hydrogenation performance of dimethyl oxalate. • The catalyst achieves excellent catalytic performance at lower hydrogen consumption. • The synergistic interaction between Co and Ag is conducive to the adsorption and activation of DMO and H 2. • Providing a potential new avenue for designing low loading catalysts for dimethyl oxalate hydrogenation. The Co-Ag x /TiO 2 catalysts with low mass content of Co and Ag were synthesized through the impregnation method and investigated for dimethyl oxalate (DMO) hydrogenation to methyl glycolate (MG). Remarkably, the Co-Ag 0.7 /TiO 2 catalyst with an Ag concentration of 0.7 wt%, exhibited an impressive yield of MG of ∼94.4 %, surpassing the yields of MG obtained with Co/TiO 2 (∼54 %) and Ag 0.7 /TiO 2 (∼69 %) catalysts. Various characterizations elucidated that the exceptional catalytic performance of Co-Ag 0.7 /TiO 2 can be ascribed to the synergy between Co and Ag, resulting in the formation of AgCoO 2 as high active site can improve the adsorption and activation of DMO and H 2 on catalyst surface. Additionally, the doping of a small amount of Ag regulated the contents of Lewis acidic and Brønsted acidic sites, leading to a high conversion of DMO and selectivity of MG. Furthermore, the excellent MG yield and long-term stability (at least 200 h) facilely obtained over our catalyst under mild reaction conditions guarantee a feasible prospect in the industrial application. This study not only unraveled the superior performance of the Co-Ag synergistic catalyst, but also carried significant implications for developing catalysts with low-content in DMO hydrogenation to MG. [ABSTRACT FROM AUTHOR]