Improving the CO₂ selectivity of ethanol oxidation reaction (EOR) is a crucial research topic right now. Rh could effectively break the CC bond of ethanol, nevertheless, pristine Rh still exhibit negligible EOR activity due to the poisoning effect of C1 intermediates. To solve it, here we fabricate modified Rh interfaces with highly-dispersive Bi(OH)₃ species as directed by the Langmuir-Hinshelwood Mechanism, the strong interaction between Rh and Bi(OH)₃ could provide the so-called electronic effect and bifunctional effect. Thus it facilitates the CC bond cleavage at Rh sites and the electrooxidation of as-generated C1 intermediates even at low overpotentials. Eventually, the optimal Rh-Bi(OH)₃ catalysts show an apparent C1 pathway faraday efficiency of 26.2% at 0.67 V vs. RHE, the EOR mass activity of ca. 3500 mA mg^{−1 Rh}and 10-hour-long durability. This work could provide an insightful and promising route in promoting the CO₂ selectivity of EOR with high activity and long stability.

提高乙醇氧化反应 (EOR)的 CO ₂选择性是当前的重要研究课题。Rh 可以有效地破坏乙醇的 C C 键，然而，由于 C1 中间体的中毒作用，原始 Rh 仍然表现出可忽略不计的 EOR 活性。为了解决这个问题，我们在 Langmuir-Hinshelwood 机制的指导下，用高分散性 Bi(OH) ₃物质制造了改性 Rh 界面，Rh 和 Bi(OH) ₃之间的强相互作用可以提供所谓的电子效应和双功能影响。因此，即使在低过电位下，它也促进了Rh 位点的 C C 键断裂和生成的 C1 中间体的电氧化。最终，最佳的 Rh-Bi(OH) ₃催化剂在 0.67 V 时显示出 26.2% 的明显 C1 途径法拉第效率，而 RHE 是约 3500 mA mg ^{-1 Rh}和 10 小时的耐久性。这项工作可以为提高具有高活性和长稳定性的 EOR的 CO ₂选择性提供有见地和有前景的途径。