Electrocatalytic property of Zn-Al layered double hydroxides for CO₂ electrochemical reduction

Electrocatalytic CO2 reduction reaction (CO2RR) has attracted considerable attention as a technology to recycle carbon dioxide (CO2) into raw materials for chemicals using renewable energies. In this study, the electrocatalytic CO2RR activity of Zn-Al layered double hydroxides (LDHs) was studied. LDHs loaded sheets were prepared, and RR performed CO2-saturated KHCO3 electrolyte confirm catalytic ability LDH. intercalated with CO32− anion synthesized mixture metal nitrates different molar ratio Zn2+/Al3+ by co-precipitation process, whose corresponding products named Zn2Al1 LDH, Zn3Al1 Zn4Al1 respectively. Except ZnO observed exist an impurity. The exhibited CO formation. case current density 15 mA cm−2 obtained 77% selectivity 94% (CO + H2) at − 1.4 V vs. RHE. Furthermore, showed significant change relating impurities in XRD patterns SEM images before after whereas LDH did not show it. These results indicate that is promising electrocatalyst