Present Cu-based catalysts are prone to yield various reduction products and small current densities in electrocatalytic CO reduction. We now construct heterostructured Cu-CuO nanoparticles on the surface of coal matrix using electrochemical reconstruction and PTFE surface modification. The introduction of PTFE modulates the reconstruction process and induces the exposure of only a single-type CuO crystal on its surface, leading to a single deep-reduction product ethylene accordingly. The electron-rich heterogeneous interface formed by internal Cu and external CuO optimizes the local electron density of surface CuO active sites, promoting the rapid protonation of *CO to *CHO and improving the catalytic tendency toward ethylene. The combination of highly conductive and robust coal matrix with hydrophobic PTFE suppresses competing side reactions and enhances the catalytic activity and selectivity to ethylene. Consequently, the Cu-based catalyst achieves the enhanced tendency for ethylene (93%), faradaic efficiency (62%) and industrial-grade current density (142.4 mA cm).

中文翻译：

---

通过可控电化学重构构建单一CO2深度还原产物乙烯的富电子Cu0-Cu2O异质界面

目前的铜基催化剂在电催化CO还原中容易产生多种还原产物并且电流密度较小。我们现在利用电化学重构和 PTFE 表面改性在煤基体表面构建异质结构 Cu-CuO 纳米粒子。 PTFE的引入调节了重构过程，并导致其表面仅暴露出单一类型的CuO晶体，从而相应地产生单一的深度还原产物乙烯。内部Cu和外部CuO形成的富电子异质界面优化了表面CuO活性位点的局域电子密度，促进*CO快速质子化为*CHO，提高对乙烯的催化倾向。高导电性和坚固的煤基质与疏水性 PTFE 的结合可抑制竞争性副反应，并提高催化活性和对乙烯的选择性。因此，铜基催化剂实现了乙烯（93%）、法拉第效率（62%）和工业级电流密度（142.4 mA cm）的增强趋势。