通过触发高性能质子交换膜电解剂的基逆溢出来产生活性金属/氧化物动态接口
Zijie Yang1, Yingkai Jiang2, Zhaoyan Luo1
1College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, P. R. China.
ACS applied materials & interfaces
|August 11, 2025
概括
一种新的偏差诱导激活策略通过触发基逆溢出对IrOx/SrTiO3-x催化剂来增强酸性氧演化 (OER). 这种方法提高了水电解仪的效率和稳定性.
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:
- 在反应过程中监测催化剂接口对于高效的酸氧演化 (OER) 是至关重要的.
- 在工作条件下实现OER催化剂的高性能和稳定性仍然是一个挑战.
研究的目的:
- 引入一种偏差诱导的激活策略,用于IrOx/SrTiO3-x催化剂.
- 调查催化剂漏和基反向溢出效应的现场调制,以提高OER.
主要方法:
- 运行X射线吸收光谱学 (XAS),微分电化学质谱学 (DEMS) 和X射线光电子光谱学 (XPS).
- 在OH激光火实验中,证实了反向OH溢出机制.
主要成果:
- 偏差诱导的Sr漏促进了网状氧介导基基的形成,并在Ti-O-Ir接口上逆转溢出.
- 这种机制绕过了传统的缩放关系,提高了催化效率和稳定性.
- 优化的催化剂在2.003V时达到3A cm-2的效果,并且在1A cm-2时800小时内没有衰变.
结论:
- 反向晶格氧溢出机制为设计高效和耐用的开放式氧化催化剂提供了一条新的途径.
- 这一策略提供了超越传统OER设计原则的表面氧化还原化学的洞察力.
- 这些发现为先进的电化学能量转换系统铺平了道路.
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