Details

Autor(en) / Beteiligte

• Wang, Mang
• Wan, Lili
• Cheng, Jinshui
• Luo, Jingshan

Titel

Scalable preparation of a CuO nanosheet array corrosion engineering for selective CC coupling in CO electroreduction

Ist Teil von

• Journal of materials chemistry. A, Materials for energy and sustainability, 2022-07, Vol.1 (26), p.147-1477

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• So far, copper (Cu) has been the only monometallic catalyst with substantial selectivity and productivity for the electrochemical CO 2 reduction reaction (ECO 2 RR) to produce C 2+ 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 ECO 2 RR 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 C 2+ products (63.93% in an H-type cell, 70% in a flow cell) in the ECO 2 RR. In addition, the electrode showed a high selectivity exceeding 80% for C 2+ products toward the electrochemical CO reduction reaction (ECORR). Moreover, we elucidate the structure-activity relationship of the CO 2 RR electrodes using our electrodes as a model, where both high active site density and moderate surface roughness are required simultaneously for an efficient CO 2 RR electrode, which would inspire future related studies. A CuO nanosheet array electrode was prepared via a facile corrosion strategy for the electrochemical CO 2 reduction reaction. In order to produce C 2+ products efficiently, both abundant defect sites and moderate surface roughness are required.