Citation: Yuhan Zheng, Yunzhen Jia, Xuelei Lang, Dazhong Zhong, Jinping Li, Qiang Zhao. Stabilizing Cu²⁺ in perovskite via A-site modulation for efficient CO₂ electrocatalysis to CH₄[J]. Chinese Chemical Letters, ;2025, 36(8): 111193. doi: 10.1016/j.cclet.2025.111193 shu

Stabilizing Cu²⁺ in perovskite via A-site modulation for efficient CO₂ electrocatalysis to CH₄

College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

zhongdazhong@tyut.edu.cn

zhaoqiang@tyut.edu.cn

Received Date: 3 January 2025
Revised Date: 8 April 2025
Accepted Date: 9 April 2025
Available Online: 10 April 2025

Figures(5)

Cu²⁺ in copper-based catalysts can facilitate the hydrogenation of the CH₄ production pathway via the electrochemical carbon dioxide reduction reaction (ECRR). However, Cu²⁺ species in copper oxides are unstable and have been revealed to reduce to Cu⁰ under the applied cathodic potential. In this work, we reported an A-site modulation strategy to stabilize Cu²⁺ in perovskite for efficient ECRR to CH₄. After the introduction of Ca²⁺ in La₂CuO₄, the obtained LaCa_0.4CuO_3-δ is stable during ECRR. We achieved a 59.6% ± 3.8% CH₄ faradaic efficiency at -1.30 V versus reversible hydrogen electrode in H-cell and a partial current density of 155.0 mA/cm² in membrane electrode assembly. DFT calculations and in situ Raman spectroscopy show that Cu²⁺ facilitates the hydrogenation of ^*CH₂O to ^*CH₃O and the further production of CH₄. This work introduces an efficient strategy to stabilize Cu²⁺ and provides an understanding of Cu²⁺ in promoting ECRR to CH₄.
- ECO₂RR,
- Electrocatalyst,
- Perovskite,
- A-site modulation,
- CH₄
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沈阳化工大学材料科学与工程学院沈阳 110142

Stabilizing Cu2+ in perovskite via A-site modulation for efficient CO2 electrocatalysis to CH4

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通讯作者: 陈斌, bchen63@163.com

Stabilizing Cu²⁺ in perovskite via A-site modulation for efficient CO₂ electrocatalysis to CH₄