采维特改性NiFe OER催化剂通过动态性微环境工程实现超稳定的离子交换膜水电解
Wenlong Li1, Yunxuan Ding2, Yilong Zhao2
1Westlake University, Department of Chemistry, CHINA.
Angewandte Chemie (International ed. in English)
|June 12, 2025
概括
这项研究引入了一种新的zwitterion-modified NiFe催化剂,用于离子交换膜水电解 (AEM-WE). 催化剂通过改善氧化物转移和减少AEM-WE系统中的性能退化来提高效率和耐久性.
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:
- 离子交换膜水电解 (AEM-WE) 对于可持续的生产至关重要.
- 工业AEM-WE需要非贵金属电催化剂.
- 缓慢的OH转移和H+积累限制了AEM-WE的性能.
研究的目的:
- 为AEM-WE开发一种高效的非贵金属电催化剂.
- 克服与AEM-WE的离子转移和性能降低相关的挑战.
- 为了提高AEM-WE系统的活性和耐用性.
主要方法:
- 通过梯度浸泡合成特改性NiFe催化剂 (z-NiFe).
- 在现场进行拉曼光谱和OH-导电性测量.
- 密度函数理论 (DFT) 的计算.
- 在1M KOH和AEM-WE设备评估中进行电化学测试.
主要成果:
- 该z-NiFe催化剂促进了快速的OH-转移,减轻了H+积累.
- 观察到一种性丰富的表面环境,抑制腐蚀.
- DFT分析显示稳定了吸附氧和降低了OER过量的潜能.
- 该z-NiFe催化剂表现出超低的塔菲尔斜率 (28.5 mV dec-1) 和高活性 (190 mV 在1,000 mA cm-2).
- 该AEM-WE设备实现了低电池电压 (1.76V在1000 mA cm-2) 和记录耐用性 (>14,000小时).
结论:
- 兹维特里昂修饰有效地提高了在AEM-WE中的OH转移和催化性能.
- 该z-NiFe催化剂显示出对工业AEM-WE应用的巨大潜力.
- 这项工作在开发可持续和高效的AEM-WE技术方面取得了重大进展.
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