Electrochemical reduction of CO₂ is promising for mitigating the excessive CO₂ emission. However, the low efficiency and poor selectivity for targeted products block the practical application of most conventional electrocatalysts. Here, we developed an electronic regulation Cu embedded into Sn nanoparticles heterogeneous bimetallic catalyst, with high catalytic activity and selectivity for electrochemical reduction of CO₂. The excellent performance of high activity is mainly due to the appearance of abundant Sn-Cu interfaces after Cu embedded into Sn nanoparticles. XPS characterization indicates that the atomic Sn electronic structure of the bimetallic catalyst was significantly regulated by deposited Cu atoms. DFT calculations in combination with In-situ Raman spectroscopy characterization on CO₂ reduction process further indicates that the electronic regulation of bimetallic catalyst facilitates the formation of key intermediate HCOO ^• followed by the generation of formate with high selectivity. The present design provides a method for prepare bimetallic catalyst with high catalytic performance.

CO _2的电化学还原有望减轻过量的CO ₂排放。然而，目标产物的低效率和低选择性阻碍了大多数常规电催化剂的实际应用。在这里，我们开发了一种嵌入到Sn纳米颗粒非均相双金属催化剂中的电子调节Cu，具有高催化活性和对电化学还原CO _2的选择性。高活性的优异性能主要是由于将Cu嵌入到Sn纳米颗粒中后，出现了大量的Sn-Cu界面。XPS表征表明，双金属催化剂的原子Sn电子结构受沉积的Cu原子显着调节。DFT计算结合CO ₂还原过程的原位拉曼光谱表征进一步表明，双金属催化剂的电子调节可促进关键中间体HCOO ^•的形成，随后生成具有高选择性的甲酸酯。本设计提供了一种制备具有高催化性能的双金属催化剂的方法。