金属缺陷和单原子合作催化,以有效的酸氧演化反应
Lili Wang1, Deshuai Yang2, Zhen Yang2
1Yangtze Delta R(eg)ion Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China; Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
Journal of colloid and interface science
|June 21, 2025
概括
单原子催化剂的缺陷工程增强了酸性介质中的氧演化反应 (OER). 在Mn缺乏MnvO4 (Ru-MnvO4) 上的Ru通过优化活动位点电子结构来提高性能和稳定性.
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:
- 单原子催化剂 (SAC) 提供高效率,但它们在酸氧演化反应 (OER) 中的性能有限.
- 金属缺陷可以通过调节电子属性来协同增强SAC,但机制尚不清楚.
- 酸性OER需要强大的催化剂,耐腐蚀性环境.
研究的目的:
- 为了研究金属缺陷和单个原子对酸性OER的协同作用.
- 了解用于增强电催化剂的潜在合作机制.
- 设计和合成一种新的缺陷工程SAC,以获得高效和稳定的酸性OER.
主要方法:
- 在Mn缺乏的MnvO4 (Ru-MnvO4) 上定单原子Ru的合成.
- 对OER性能进行电化学表征 (超电位,稳定性).
- 在现场FT-IR光谱和DFT计算以阐明反应机制.
主要成果:
- 在MnvO4中的Mn缺陷调节了Ru活性位点的电子结构.
- 削弱的Ru-O-O*相互作用促进了中间溶解.
- Ru-MnvO4遵循了氧化物通路机制,减少了能量障碍.
- 实现了低超电位 (143 mV在10 mA cm-2) 和出色的稳定性 (>300 h).
结论:
- 金属缺陷和单个原子之间的合作效应对于设计高效的酸性OER催化剂至关重要.
- 缺陷工程提供了一个可行的策略,以优化SACs要求电化学反应.
- 鲁-MnvO4显示出作为酸性OER的高性能催化剂的潜力.
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