Rh has been regarded as a promising catalyst for ethanol-oxidation reaction (EOR). Nevertheless, Rh is vulnerable to CO poisoning. In this work, we demonstrate a facile strategy for constructing a unique class of ultrathin Rh/Rh-M nanosheets, on which CO can diffuse from the Rh site to the M site. Detailed experiments, characterizations, and theoretical simulations have been conducted to validate the CO spillover effects on Rh/Rh-M nanosheets (NSs). Moreover, the significance of the CO spillover effect has been demonstrated by catalyzing the EOR, where Rh/Rh-M NSs with CO spillover display much higher activity, higher CO₂ selectivity, and stronger resistance to CO poisoning compared with pure Rh NSs. Consequently, the Faraday efficiencies (FEs) of CO₂ of the optimal catalyst (e.g., Rh₇₉Co₂₁ NSs) are 70.3% and 75.5% at 0.7 and 0.8 V_RHE, respectively, and these are much higher than those of Rh NSs (62.0% and 64.3% at 0.7 and 0.8 V_RHE, respectively).

Rh被认为是一种很有前途的乙醇氧化反应（EOR）催化剂。然而，Rh 很容易受到 CO 中毒的影响。在这项工作中，我们展示了一种简单的策略来构建独特的一类超薄 Rh/Rh-M 纳米片，CO 可以在其上从 Rh 位点扩散到 M 位点。已经进行了详细的实验、表征和理论模拟，以验证 CO 对 Rh/Rh-M 纳米片 (NS) 的溢出效应。此外，通过催化 EOR 证明了 CO 溢出效应的重要性，其中具有 CO 溢出的 Rh/Rh-M NSs 与纯 Rh NSs 相比表现出更高的活性、更高的 CO ₂选择性和更强的 CO 中毒抗性。因此，最佳催化剂（例如，Rh ）的 CO _{2的法拉第效率 (FEs)79} Co _{21 NSs) 在 0.7 和 0.8 V RHE}下分别为 70.3% 和 75.5% ，并且这些值远高于 Rh NSs（在 0.7 和 0.8 V _RHE下分别为 62.0% 和 64.3%）。