Ni3Al1‐LDH@ZIF‐8 Performance Study of Electrocatalytic Reduction of CO2 to CO

Abstract Electrocatalytic reduction of CO 2 to value‐added products is a mild and clean method to tackle climate change and energy demands. In this paper, the composite catalysts of xNi 3 Al 1 ‐LDH@ZIF‐8 ( x = 0.2, 0.5, and 0.8 g) were synthesized by changing the input of Ni 3 Al 1 ‐LDH in the process of preparing. The catalyst crystalline structure, morphology, surface area, and composition were characterized, and the performance of electrocatalytic reduction of CO 2 was also evaluated. The results showed that the material of 0.5Ni 3 Al 1 ‐LDH@ZIF‐8 was a rhombic dodecahedron structure with surface attached lamellae structure. The 0.5Ni 3 Al 1 ‐LDH@ZIF‐8 had a relatively maximum partial current density of CO is 24.0 mA cm −2 , and the maximum faraday efficiency of CO (FE CO ) was 94.45% when applies voltage at −1.4 V versus reversible hydrogen electrode (versus RHE). During electrolysis for 13500 s, the average current density of 0.5Ni 3 Al 1 ‐LDH@ZIF‐8 electrode was about 25.8 mA cm −2 , and FE CO was stable at 91 ± 2%, which showed that the 0.5Ni 3 Al 1 ‐LDH@ZIF‐8 composite had good catalytic stability. This research explores a new method of combining hydrotalcite metal–organic framework as electrocatalyst in catalytic field, which provides a new idea of exploration prospect for the design of electrocatalyst in catalytic field.