Selective CO2 hydrogenation enhanced by tuning zinc content in nickel catalysts

Abstract

Electron-rich Ni sites in Ni₃Zn–Al₂O₃ drive CO production through monodentate formate decomposition. Meanwhile, a Zn-evaporation-mediated strategy was proposed to tune Zn content and engineered electron-deficient Ni–Al₂O₃ promotes CH₄ formation by enabling bidentate formate hydrogenation with abundant *H under lean redox conditions (CO₂ : H₂ = 1 : 1).