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使用工程双相氧化催化剂的高度坚固的膜电极组装打破了在质子交换膜水电解中的活动耐久性权衡

Ho Seong Yang¹, Song Gyun Kim¹, Rubin Shin¹

¹Graduate School of Energy Convergence, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|March 10, 2026

概括

这项研究引入了一种新的空心双相氧化物催化剂,用于通过质子交换膜水电解产生绿色. 催化剂的设计协调了高活性和耐用性,推进了高效和稳定的电解器性能,减少了负荷.

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
可持续能源可持续能源

背景情况:

质子交换膜水电解 (PEMWE) 是绿色的关键.
基于的氧化演化反应 (OER) 催化剂在酸性介质中面临活动稳定性权衡问题.
无形IronO_x具有高活性,但稳定性较差;晶体IronO₂是稳定的,但活性较低.

研究的目的:

为PEMWE开发一种新型催化剂,使无形氧化物和晶体氧化物相互冲突的特性相协调.
研究双相工程对催化剂性能和稳定性的影响.
为低负载PEMWE推进高效和耐用的阳极材料.

主要方法:

使用聚多巴胺涂层聚烯球体硬模板合成空心双相氧化 (HDP-IrO_x).
通过化温度调整无形晶体比率.
使用模板直径 (190,240,360 nm) 控制外架构和无形域形成.
在半细胞和单细胞PEMWE配置中进行电化学评估.

主要成果:

优化的HDP-IrO-240在10 mA cm-2时显示了283 mV的低超电位.
HDP-IrO-360在2 A cm-2 时达到1.77 V,在1036小时内具有异常稳定性 (31.5 μV h-1 衰变率).
观察到有合作性无形晶体相互作用,增强电荷传输和结构完整性.

结论:

氧化的双相工程有效地协调了PEMWE的催化活性和耐用性.
HDP-IrO_x催化剂代表了下一代PEMWE阳极的重大进步.
这种方法可以有效地生产绿色,减少对贵重的依赖.

关键词:

活动耐久性的权衡.双相催化剂是一种双相催化剂.氧化催化剂的催化剂是氧化.氧气进化反应反应氧气进化反应质子交换膜水电解水的电解.

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