Ru活性场所的价值振荡为高效和强大的酸性水氧化
Liming Deng1, Sung-Fu Hung2, Zih-Yi Lin2
1College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
Advanced materials (Deerfield Beach, Fla.)
|September 6, 2023
概括
新的-氧化物异构结构克服了质子交换膜水电解器中基于的催化剂的稳定性问题. 这些增强的催化剂对酸氧演化反应的活性和耐用性有所改善.
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:
- 基于的催化剂在质子交换膜水电解器 (PEMWE) 中遭受氧化和浸出.
- 这种不稳定性限制了它们在酸氧演化反应 (OER) 中的实际应用.
研究的目的:
- 开发强大的-氧化物异构结构[Ru-W) Ox,以增强OER活动和稳定性.
- 调查兴奋剂在稳定活性部位中的作用.
主要方法:
- 通过顺序的快速氧化和金属热迁移制造相互合的[Ru-W) Ox]异构结构.
- 在酸性电解质中OER活性和稳定性的电化学表征.
- 分析电子结构和稳定机制.
主要成果:
- 互补的异构结构表现出稳定的Ru活性点,超出Pourbaix稳定性极限.
- 的引入导致Ru站点的价值振荡,确保连续运行.
- 不对称的Ru-O-W活性单元增强氧中间体的协同吸附.
- 实现了低超电位 (170mV在10mA cm-2) 和显著的稳定性 (300小时).
结论:
- 拟议的[Ru-W) Ox异构结构为PEMWE中稳定和活跃的OER催化剂提供了一个有希望的解决方案.
- 已经证明了实际应用的潜力,在高电流密度下稳定运行 (0.5 A cm-2 300 h).
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