六氟磷酸盐调制的CuO用于增强CO2电还原中C2物种的选择性
{"_":"Hexafluorophosphate-Modulated CuO for Selectivity Enhancement of C Species in Electroreduction of CO.","sub":["2","2"]}
摘要(中文译文)
铜基催化剂因其成本效益高且能灵活生成多碳产物，被广泛应用于二氧化碳电还原（COER）中。然而，提高产物选择性，尤其是对C₂物种（含两个碳原子的烃类）的选择性，仍是一项重大挑战。本文通过六氟磷酸铵（NHPF）调控微波辅助合成氧化铜（CuO），制得表面吸附六氟磷酸根的薄CuO纳米片（厚度约12 nm），记为CuO-PF。该CuO-PF催化剂有助于稳定COER过程中的关键反应中间体。因此，在H型电化学池中，COER过程中C₂产物（乙烯和乙醇）的法拉第效率（FE）可提高至75.8% ± 0.5%。在流动池中，该C₂法拉第效率增至82.4%。C₂物种法拉第效率的提高可归因于PF₆⁻调控的Cu表面电子结构以及对关键反应中间体（尤其是涉及C₂生成的那些中间体）的稳定作用。此外，CuO-PF还表现出超过10 h的高催化稳定性。这项工作为通过表面改性策略提升COER提供了更深入的理解，有望用于设计高效、稳定且用于CO₂-to-fuel转化的杂化电催化剂。
Abstract
Copper (Cu)-based catalysts are widely employed in electroreduction of carbon dioxide (COER) because of their cost-effectiveness and versatility in producing multi-carbon products. However, improving the product selectivity, especially toward C species (hydrocarbon containing two carbon atoms), remains a significant challenge. Herein, the microwave-assisted synthesis of copper oxide (CuO) is modulated with ammonium hexafluorophosphate (NHPF), obtaining thin CuO (ca. 12 nm in thickness) nanosheets with the surface adsorbed with hexafluorophosphate, referred as CuO-PF. This CuO-PF catalyst could help stabilize the key reaction intermediates during COER. Therefore, the Faradaic efficiency (FE) of C products (ethylene and ethanol) during COER could be improved to 75.8% ± 0.5% in an H-type electrochemical cell. This C FE increases to 82.4% in a flow cell. The improved FE toward C species could be attributed to the PF-modulated electronic structure of Cu surface and stabilization of key reaction intermediates, especially those involving C production. In addition, CuO-PF also demonstrates a high catalytic stability over 10 h. This work provides a deeper understanding of surface modification strategy for COER enhancement, promising for designing hybrid electrocatalysts with high efficiency and stability for CO-to-fuel conversion.
如何引用
AMA
Lu Jiang, Yaning Liu, Qinghua Liu, Zhiwei Yang, Miao Ji, Haonan Chen, et al. {"_":"Hexafluorophosphate-Modulated CuO for Selectivity Enhancement of C Species in Electroreduction of CO.","sub":["2","2"]}. Small (Weinheim an der Bergstrasse, Germany). 2026; doi:10.1002/smll.202513677.
APA
Lu Jiang, Yaning Liu, Qinghua Liu, Zhiwei Yang, Miao Ji, Haonan Chen, et al (2026). {"_":"Hexafluorophosphate-Modulated CuO for Selectivity Enhancement of C Species in Electroreduction of CO.","sub":["2","2"]}. Small (Weinheim an der Bergstrasse, Germany). https://doi.org/10.1002/smll.202513677
GB/T 7714
Lu Jiang, Yaning Liu, Qinghua Liu, Zhiwei Yang, Miao Ji, Haonan Chen, et al. {"_":"Hexafluorophosphate-Modulated CuO for Selectivity Enhancement of C Species in Electroreduction of CO.","sub":["2","2"]}[J]. Small (Weinheim an der Bergstrasse, Germany), 2026 doi:10.1002/smll.202513677.
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