Cu-based electrochemical catalysts are of great potential in converting CO2 to energy-intensive multicarbon products by utilizing sustainable energy. While there exist challenges in obtaining high selectivity for specific products due to the other unavoidable competitive reaction pathways. Herein, we incorporate the Al element into Cu-based oxide by the simple wet chemical method to obtain the Cu-Al bimetallic oxide with Cu+/Cu0+ active sites. The electrocatalytic measurement shows that the Cu90Al10Ox catalyst possesses good electrocatalytic capacity with the highest C2 Faradic efficiency of 79.3 % at 300 mA cm−2. It is demonstrated that the biggest ratio of FEC2: FEC1 is 4.82 in Cu90Al10Ox, which is about 4 times of CuOx (FEC2: FEC1 = 1.24). The in situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy measurements exhibit that the catalyst can modulate the binding energy and enhance the adsorption ability of the *CO intermediate, which promotes the reaction pathway of multicarbon products and affects the intrinsic catalytic ability.

中文翻译：

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提高 CuAlOx 催化剂上 *CO 中间体的覆盖率，用于 CO2 电还原成多碳产品


铜基电化学催化剂在利用可持续能源将 CO2 转化为能源密集型多碳产品方面具有巨大潜力。虽然由于其他不可避免的竞争性反应途径，在获得特定产物的高选择性方面存在挑战。在此，我们通过简单的湿化学方法将 Al 元素掺入 Cu 基氧化物中，以获得具有 Cu+/Cu0+ 活性位点的 Cu-Al 双金属氧化物。电催化测量表明，Cu90Al10Ox 催化剂具有良好的电催化容量，在 300 mA cm-2 时最高 C2 法拉第效率为 79.3 %。结果表明，FEC2：FEC1 在 Cu90Al10Ox 中的最大比值为 4.82，约为 CuOx 的 4 倍 （FEC2： FEC1 = 1.24）。原位衰减全反射表面增强红外吸收光谱测量表明，催化剂可以调节 *CO 中间体的结合能并增强吸附能力，从而促进多碳产物的反应途径并影响本征催化能力。