稀土调节债券极化性在分层酸盐中,以促进面积重建向C2+电合成
Huanhuan Tao1, Shaohuan Hong2, Wei-Hsiang Huang3,4
1Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
Angewandte Chemie (International ed. in English)
|October 10, 2025
概括
研究人员调节了多层酸盐中的铜-氧键特性,以增强电化学二氧化碳减排 (CO2RR) 到多碳产品 (C2+). 优化Pr2CuO4实现了C2+产品的~80%法拉代效率.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 铜氧化物对多碳 (C2+) 产品的电化学二氧化碳还原反应 (CO2RR) 是有前途的.
- 了解氧化物键特性与CO2RR诱导的重建之间的关系至关重要,但尚未得到充分研究.
研究的目的:
- 使用A位点稀土调制,调节 Cu-O 键的极化性在分层酸盐 (Ln2CuO4) 中.
- 促进从CO2中进行高效C2+电合成的表面重建.
主要方法:
- 合成分层酸盐 (Ln2CuO4,Ln = La,Pr,Nd,Sm,Gd) 与不同A位点稀土元素的合成.
- 在膜电极组件中进行电化学CO2降解反应 (CO2RR) 测试.
- 实验和理论分析以将键特性与催化性能相关联.
主要成果:
- 优化的Pr2CuO4表现出最高的Cu-O键极化性,从而实现了优越的CO2RR性能.
- 在C2+产品中实现了~80%的法拉代效率,在-1.7V与RHE相比,部分电流密度为376.2mA cm-2.
- 证明了强大的耐用性,保持200 mA cm-2电流密度.
结论:
- 增加的Cu-O键极化性 (较长的键,较低的价值) 促进Cu-O键断裂,形成活性Cu纳米粒子.
- 重建的金属Cu纳米粒子和Cu/Pr2CuO4接口充当双重活性位点.
- 增强的C2+选择性归因于改进的*CO覆盖面和降低的C-C合能源障碍.
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