短距离的Nd-Doped IrOx 启用了高性能PEM水电解的氧化物路径机制
Guangyue Liu1,2, Lifang Chen1, Zhenyu Liu1
1State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, China.
Small (Weinheim an der Bergstrasse, Germany)
|February 6, 2026
概括
氧化物添加的氧化物 (Nd-IrOx) 催化剂通过优化氧化物通路机制来增强质子交换膜水电解 (PEMWE). 这一突破提供了高效的生产,提高了活性和稳定性.
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:
- 质子交换膜水电解 (PEMWE) 需要具有低含量的高效阳极.
- 传统的基于的催化剂面临着活动稳定性的权衡.
研究的目的:
- 设计用于PEMWE的合无形氧化 (Nd-IrOx) 催化剂.
- 为了精确控制短距离结构并激活氧化物通路机制 (OPM).
主要方法:
- 纳入 Nd3+ 在无形的 IrOx矩阵中.
- 优化边缘共享[IrO6]八面体的网格扭曲和电子调制.
- 在酸性介质中的催化剂性能的表征.
主要成果:
- Nd-IrO催化剂具有超低的酸氧演化反应 (OER) 超电位,在10 mA cm-2时为254 mV,稳定性为520小时.
- 使用超低Ir负载的PEMWE (0.5 mgIr cm-2) 实现了DOE相关的电流密度 (在1.9V时为4A cm-2).
- 在1 A cm-2时表现出显著的1000小时稳定性.
结论:
- 基于Ir的氧化物的短距离结构工程是催化剂设计的可行策略.
- 优化的Nd-IrOx催化剂为OER路径控制提供了基本的见解.
- 这种方法通过提高催化剂性能和寿命,促进了高效的生产.
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