Amphipathic Surfactant on Reconstructed Bismuth Enables Industrial-Level Electroreduction of CO 2 to Formate

作者：Yiqun Chen, Yan Zhang, Zhen Li, Mengjie Liu, Qiang Wu, Tsz Woon Benedict Lo, Zheng Hu, Lawrence Yoon Suk Lee · 发表于：ACS Nano · 年份：2024 · DOI：10.1021/acsnano.4c06019 · 被引用次数：46 · 研究领域：CO2 Reduction Techniques and Catalysts、Ionic liquids properties and applications、Carbon Dioxide Capture Technologies

Developing efficient electrocatalysts for selective formate production via the electrochemical CO 2 reduction reaction (CO 2 RR) is challenged by high overpotential, a narrow potential window of high Faradaic efficiency (FE formate ), and limited current density ( J formate ). Herein, we report a hierarchical BiOBr (CT/h-BiOBr) with surface-anchored cetyltrimethylammonium bromide (CTAB) for formate-selective large-scale CO 2 RR electrocatalysis. CT/h-BiOBr achieves over 90% FE formate across a wide potential range (−0.5 to −1.1 V) and an industrial-level J formate surpassing 100 mA·cm –2 at −0.7 V. In situ investigations uncover the reconstructed Bi(110) surface as the active phase, with CTAB playing a dual role: its hydrophobic alkyl chains create a CO 2 -enriching microenvironment, while its polar head groups fine-tune the electronic structure, fostering a highly active phase. This work provides valuable insights into the role of surfactants in electrocatalysis and guides the design of electrocatalysts for the large-scale CO 2 RR.