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- Title
CO<sub>2</sub> electrolysis to multi-carbon products in strong acid at ampere-current levels on La-Cu spheres with channels.
- Authors
Feng, Jiaqi; Wu, Limin; Song, Xinning; Zhang, Libing; Jia, Shunhan; Ma, Xiaodong; Tan, Xingxing; Kang, Xinchen; Zhu, Qinggong; Sun, Xiaofu; Han, Buxing
- Abstract
Achieving satisfactory multi-carbon (C2+) products selectivity and current density under acidic condition is a key issue for practical application of electrochemical CO2 reduction reaction (CO2RR), but is challenging. Herein, we demonstrate that combining microenvironment modulation by porous channel structure and intrinsic catalytic activity enhancement via doping effect could promote efficient CO2RR toward C2+ products in acidic electrolyte (pH ≤ 1). The La-doped Cu hollow sphere with channels exhibits a C2+ products Faradaic efficiency (FE) of 86.2% with a partial current density of −775.8 mA cm−2. CO2 single-pass conversion efficiency for C2+ products can reach 52.8% at −900 mA cm−2. Moreover, the catalyst still maintains a high C2+ FE of 81.3% at −1 A cm−2. The channel structure plays a crucial role in accumulating K+ and OH- species near the catalyst surface and within the channels, which effectively suppresses the undesired hydrogen evolution and promotes C–C coupling. Additionally, the La doping enhances the generation of *CO intermediate, and also facilitates C2+ products formation. Efficient electroreduction of CO2 to multi-carbon products under strong acidic condition is highly challenging. Here, the authors demonstrate that combining microenvironment modulation and La doping effect could promote multicarbon products generation in acidic electrolyte.
- Subjects
ELECTROLYSIS; COUPLING reactions (Chemistry); CATALYTIC activity; SPHERES; PHOTOCATHODES; COPPER; DOPING agents (Chemistry); ELECTROLYTIC reduction
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-49308-8