在层间限制下协同的空间电子调节:通过双通道控制来破坏氧气演变/还原反应缩放关系
Xinyi Lu1, Haicai Huang2, Yihui Bao3
1Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China; School of Information Science and Engineering, East China University of Science and Technology, Shanghai 200237, PR China.
Journal of colloid and interface science
|February 6, 2026
概括
研究人员开发了间层限制的双单原子催化剂 (iDSACs),以打破线性缩放关系,提高氧化演化和还原反应 (OER/ORR) 的电催化剂性能. 该战略推进了高效的能源转换技术.
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:
- 氧气演变和还原反应 (OER/ORR) 对于水电解器和燃料电池等能源技术至关重要.
- 中间吸附能量的线性缩放关系 (LSR) 限制了电催化剂的活动,阻碍了超出传统火山关系的性能.
研究的目的:
- 提出和研究一种新的层间封闭工程策略,从根本上打破OER/ORR电催化剂中内在的LSR.
- 设计高性能电催化剂,通过操纵反应路径和使用空间有限的双活性位点进行中间吸附来设计.
主要方法:
- 利用密度函数理论 (DFT) 的计算来研究层间限制的双单原子催化剂 (iDSAC).
- 研究了协同作用的空间电子效应和限制强度对反应中间体和吸附能量的影响.
- 优化层间距离以平衡双站点协同效应和硬体效应.
主要成果:
- 证明协同空间电子效应增强电荷转移,激活O-O键,并促进解离.
- 表明调封闭强度会破坏*OOH和*OH吸附之间的LSR,改善OER和ORR活动.
- 确定了7.0 Å的最佳层间距离,在IrN4.4上实现了0.26 V (OER) 和0.30 V (ORR) 的低超电位.
结论:
- 在封闭的催化剂中建立了空间电子协同作用,作为破坏吸附缩放规律的通用平台.
- 通过克服内在活动限制,为OER/ORR提供先进的高效电催化剂设计.
- 为能量转换的封闭式电催化机制提供了基本的见解.
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