Abstract Understanding CO 2 reduction reaction (CO2RR) and developing robust catalysts for selective CO2RR is key to closing carbon cycle and to achieving energy sustainability with desired environmental remediation. Electrochemical CO2RR on a catalyst surface is an attractive method to realize high reaction activity and selectivity under mild reaction conditions. Among various catalysts studied thus far, metallic Cu-based nanocatalysts have demonstrated to be promising for selective CO2RR to HCOOH, CO or, more importantly, to CH 4 , C 2 H 4 and C 2 H 6 with relatively high efficiency. This review summarizes recent progresses made on these Cu-based nanocatalysts for CO2RR, including fundamental of electrochemical CO2RR, representative approaches to Cu-based nanocatalysts via nanoporous structure, nanoparticle size, composition, surface, support and morphology controls. The review should offer readers some important insights on Cu-catalyzed CO2RR, and will further help readers in their efforts to design and develop robust catalysts for active and selective CO2RR.

中文翻译：

---

用于电化学还原 CO 2 的铜基纳米催化剂

摘要 了解 CO 2 还原反应 (CO2RR) 并开发用于选择性 CO2RR 的稳健催化剂是关闭碳循环和通过所需的环境修复实现能源可持续性的关键。催化剂表面的电化学 CO2RR 是一种在温和反应条件下实现高反应活性和选择性的有吸引力的方法。在迄今为止研究的各种催化剂中，金属铜基纳米催化剂已被证明有望以相对较高的效率选择性地将 CO2RR 转化为 HCOOH、CO，或更重要的是，转化为 CH 4 、C 2 H 4 和 C 2 H 6 。本综述总结了这些用于 CO2RR 的 Cu 基纳米催化剂的最新进展，包括电化学 CO2RR 的基础，通过纳米多孔结构、纳米颗粒尺寸、组成、表面、支持和形态控制。该综述将为读者提供一些关于铜催化 CO2RR 的重要见解，并将进一步帮助读者设计和开发用于活性和选择性 CO2RR 的稳健催化剂。