近日，课题组硕士生尚益竹论文“Toward Highly Active Electrochemical CO₂ Reduction to C₂H₄ by Copper Hydroxyphosphate”被Journal of Solid State Electrochemistry接收！

Abstract:

Electrocatalytic carbon dioxide reduction reaction (CO₂RR) is a promising method to deal with the greenhouse effect and the energy crisis. In a well-designed Cu-based catalyst, the unique crystal structure with active electronic properties is crucial for CO₂RR. Here, a series of copper hydroxyphosphate catalysts were synthesized via one-step solvothermal process and applied in CO₂RR. The concentration of hydroxide ion (OH^-) and ammonium ion (NH₄₊) plays an important role in the formation and aggregation of the crystal architectures. Compared to copper monohydroxyphosphate (Cu₂(OH)PO₄), copper tetrahydroxyphosphate (Cu₅(OH)₄(PO₄)₂) exhibits superior selectivity and activity for CO₂RR to C₂H₄. The Faradaic efficiency of C₂H₄ was achieved over 37.4% with the outstanding stability. The unique structure and morphology characteristics endow Cu₅(OH)₄(PO₄)₂ with more hydroxyl groups (-OH) and higher catalytic area. It affords the high CO₂RR performance by not only increasing the interaction between the catalysts and CO₂ molecules, but also providing more active sites for CO₂RR. This work provides a new perspective for the design of stable novel Cu-based catalysts with tunable chemical environment for CO₂RR.