Scalable preparation of a CuO nanosheet array via corrosion engineering for selective C–C coupling in CO2 electroreduction,Journal of Materials Chemistry A

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Scalable preparation of a CuO nanosheet array via corrosion engineering for selective C–C coupling in CO2 electroreduction
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-06-07 , DOI: 10.1039/d2ta01634f
Mang Wang ₁ , Lili Wan ₁ , Jinshui Cheng ₁ , Jingshan Luo ₁

Affiliation

So far, copper (Cu) has been the only monometallic catalyst with substantial selectivity and productivity for the electrochemical CO₂ reduction reaction (ECO₂RR) to produce C₂₊ products. However, there still remains an enormous challenge to prepare highly efficient Cu electrodes on a large scale for industrial application. Additionally, further understanding of the structure–activity relationship of electrodes used in the ECO₂RR is significantly important but lacking for the design of efficient Cu electrodes. Herein, we report a scalable preparation of a CuO nanosheet array on a Cu substrate via a facile corrosion engineering strategy. By tuning the surface roughness via controlling the corrosion time, we achieved a high faradaic efficiency (FE) for C₂₊ products (63.93% in an H-type cell, 70% in a flow cell) in the ECO₂RR. In addition, the electrode showed a high selectivity exceeding 80% for C₂₊ products toward the electrochemical CO reduction reaction (ECORR). Moreover, we elucidate the structure–activity relationship of the CO₂RR electrodes using our electrodes as a model, where both high active site density and moderate surface roughness are required simultaneously for an efficient CO₂RR electrode, which would inspire future related studies.

中文翻译：

通过腐蚀工程可扩展地制备 CuO 纳米片阵列，用于 CO2 电还原中的选择性 C-C 耦合

到目前为止，铜 (Cu) 是唯一一种对电化学 CO ₂还原反应 (ECO ₂ RR) 生产 C ₂₊产品具有高选择性和产率的单金属催化剂。然而，大规模制备用于工业应用的高效铜电极仍然存在巨大挑战。此外，进一步了解 ECO ₂ RR 中使用的电极的结构-活性关系非常重要，但对于高效铜电极的设计却缺乏。在此，我们报告了通过简单的腐蚀工程策略在 Cu 基板上可扩展地制备 CuO 纳米片阵列的方法。通过调整表面粗糙度_{通过控制腐蚀时间，我们在 ECO 2} RR中实现了 C ₂₊产物的高法拉第效率 (FE) （H 型电池中为 63.93%，流通池中为 70%）。此外，该电极对C ₂₊产物对电化学CO还原反应（ECORR）的选择性超过80%。此外，我们使用我们的电极作为模型阐明了 CO _{2 RR 电极的构效关系，其中高效的 CO}₂ RR 电极同时需要高活性位点密度和适度的表面粗糙度，这将激发未来的相关研究。

更新日期：2022-06-07

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