Among many alternatives, CO₂ electroreduction (CO₂ER) is an emerging technology to alleviate its level in the atmosphere and simultaneously to produce essential products containing high energy density using various electrocatalysts. Cu‐based mono‐ and bimetallics are electrocatalysts of concerns in this work due to the material's abundance and versatility. Intrinsic factors affecting the CO₂ER are first analyzed, whereby understanding and characterizing the surface features of electrocatalysts are addressed. An X‐ray absorption spectroscopy‐based methodology is discussed to determine electronic and structural properties of electrocatalyst surface which allows the prediction of reaction mechanism and establishing the correlation with reduction products. The selectivity and faradaic efficiency of products highly depend on the quality of surface modification. Preparation and modification of electrocatalyst surfaces through various techniques are critical to increase the number of activity sites and the corresponding site activity. Mechanisms of CO₂ER are complicate and thus are discussed in accordance with main products of interests. The authors try to concisely compile the most interesting, recent, and reasonable ideas that are agreeable to experimental results. Finally, this review provides an outlook for designing better Cu and Cu‐based bimetallic catalysts to obtain selective products through CO₂ER.

中文翻译：

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用于二氧化碳电还原的铜和铜基双金属催化剂

在许多替代方案中，CO ₂电解还原（CO ₂ ER）是一种新兴技术，旨在降低其在大气中的含量，并同时使用各种电催化剂生产包含高能量密度的基本产品。铜基单金属和双金属由于其材料的丰富性和多功能性成为这项工作中关注的电催化剂。影响CO _2的内在因素首先分析ER，从而了解和表征电催化剂的表面特征。讨论了基于X射线吸收光谱法的方法，以确定电催化剂表面的电子和结构性质，从而可以预测反应机理并建立与还原产物的相关性。产品的选择性和法拉第效率在很大程度上取决于表面改性的质量。通过各种技术制备和修饰电催化剂表面对于增加活性位点的数量和相应的位点活性至关重要。CO _2的作用机理ER是复杂的，因此将根据感兴趣的主要产品进行讨论。作者试图简明扼要地汇编出与实验结果相吻合的最有趣，最新和合理的想法。最后，本综述提供了设计更好的Cu和Cu基双金属催化剂以通过CO ₂ ER获得选择性产物的前景。