Electrochemical reduction of CO₂ into value-added products is an effective approach to relieve environmental and energetic issues. Herein, EDTA anion-modified porous hollow copper microspheres (H–Cu MPs) were constructed by EDTA-2Na-assisted electrodeposition. The faradic efficiency (FE) of ethylene doubled from 23.3% to 50.1% at −0.82 V vs RHE in nearly neutral 0.1 M KHCO₃ solution, one of the highest values among copper-based electrodeposited catalysts. Apart from the favorable influence from morphology regulated by EDTA-2Na, theoretical calculations revealed that the adsorbed EDTA anions were able to create a local charged copper surface to stabilize the transition state and dimer and to assist in the stabilization by interacting with OCCO adsorbate synergistically, which contributed to the outstanding catalytic performance together.

中文翻译：

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EDTA改性多孔空心铜微球的可控合成，可高效地将CO2转化为多碳产物。

将CO ₂电化学还原为增值产品是缓解环境和能源问题的有效方法。本文中，EDTA-2Na辅助电沉积法制备了EDTA阴离子改性的多孔空心铜微球（H–Cu MPs）。乙烯的法拉第效率（FE）在-0.82 V时相对于RHE在接近中性的0.1 M KHCO _3中从23.3％翻倍至50.1％溶液，是铜基电沉积催化剂中最高的值之一。理论计算表明，除了受EDTA-2Na调节的形貌的有利影响外，吸附的EDTA阴离子还能够形成局部带电的铜表面，以稳定过渡态和二聚体，并通过与OCCO吸附物协同作用来协助稳定化，共同促进了出色的催化性能。