单原子催化剂的不对称协调策略,用于强大的全pH氧降解反应
Le Liu1, Feng Chen1, Haowei Yang1
1Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
Small (Weinheim an der Bergstrasse, Germany)
|June 13, 2025
概括
兴奋剂增强铜--碳单原子催化剂的氧降解反应 (ORR) 在所有pH水平. 这一突破提高了电催化和空气电池的效率和稳定性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 铜--碳单原子催化剂 (Cu-N-C SACs) 对氧降解反应 (ORR) 是有前途的,但由于刚性Cu-N4活性点而受到质量转移和电子传输限制.
- 优化Cu-N4位点的电子结构对于克服这些局限性和增强催化活性至关重要.
研究的目的:
- 调查兴奋剂对Cu-N-C SAC电子结构和ORR性能的影响.
- 为ORR和空气电池开发一种具有增强活性和稳定的Cu-N-C/Cl新型电催化剂.
主要方法:
- 不对称的协调策略涉及Cu-N-C SACs的兴奋剂.
- 在性,酸性和中性电解质中ORR活性的电化学表征.
- 实验和理论研究 (例如,d波段中心分析) 以阐明的作用.
- 在空气电池 (ZAB) 设置中的性能评估.
主要成果:
- -N-C/Cl电催化剂表现出卓越的ORR活性,其半波电位为0.915V (性),0.74V (酸性) 和0.67V (中性).
- 兴奋剂通过破坏电子对称性和转移Cu d带中心来优化电子结构,改善中间吸附/脱附.
- 在ZAB中,Cu-N-C/Cl催化剂表现出色,达到286mW cm-2的峰值功率密度和797.2 mAh g-1.1的容量.
- 观察到特殊的长期稳定性,连续运行超过600小时.
结论:
- 兴奋剂是一种有效的策略,可以调节SAC中的Cu-N4位点的电子结构,显著提高ORR性能.
- 开发的Cu-N-C/Cl电催化剂为高效稳定的ORR催化和储能应用 (如ZABs) 提供了一个有希望的替代方案.
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