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在聚胺上原子分散的支持酸性氧的进化

Longsheng Zhang¹, Jing Bai¹, Shouhan Zhang¹

¹Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China.

|August 8, 2024

概括

我们开发了一种稳定的单原子催化剂,用于酸性水的电解. 在聚胺支上固定可显著提高氧演化反应活性和耐久性.

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:

酸性水电解对于可持续的生产至关重要.
(Ir) 催化剂对氧演化反应 (OER) 具有很高的活性,但需要高效的金属使用.
在OER条件下稳定单个原子是具有挑战性的.

研究的目的:

为酸性OER设计和合成一种高度活性和稳定的单原子催化剂.
研究聚胺支在稳定单个原子和提高催化性能方面的作用.

主要方法:

将单个原子固定在聚胺支上.
为OER性能提供催化剂的电化学表征.
密度函数理论 (DFT) 计算以了解反应机制.

主要成果:

在聚胺支上使用的Ir单原子催化剂 (Ir₁-PI@CP) 显示出OER的高质量活性.
催化剂表现出极好的稳定性,在360小时内衰变微不足道.
与没有聚胺支持的催化剂相比,观察到质量活动的49.7倍改善.

结论:

聚胺支增强了Ir 5d状态,调整了中间吸附和降低了OER热力学障碍.
强大的金属支相互作用促进质子电子转移,改善反应动力学.
这项工作提出了一个可行的策略,用于开发各种应用的强大的单原子催化剂.

关键词:

和的价值观和的价值观金属 - 支相互作用.氧气进化反应反应氧气进化反应聚胺聚胺的使用方法一个原子的催化剂.

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