Pyridine derivatives modified CuPt metals for CO₂ electroreduction

Conversion of CO₂ into high-value chemicals through electro-catalysis is a promising approach. This study based on the design flexibility of copper-based catalysts and the proton transfer properties of pyridine, mercaptopyridine (HSPy)-modified copper-based bimetallic materials were prepared for the electrocatalytic reduction of CO₂, taking advantage of the bonding interactions between metals and sulfur. The Cu₁Pt_0.05-SPy_x composites, prepared through a one-step method, exhibit high Faradaic efficiency for CO₂ conversion, particularly to methanol and methane. This excellent performance is mainly attributed to the synergistic interaction between the metals and between the metal and the modified pyridine. Pyridine modified on the composite through M-S bonds can effectively promote H transfer and assist in the reduction of CO₂. The introduction of Pt tunes the electronic structure of Cu and significantly increases the extent of pyridine modification, improves the stability. The result in an efficient and stable heterogeneous electrocatalytic material with promising potential for future applications.