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道结构的IrO_x释放了质子交换膜水电解器中的催化效率

Mingcheng Zhang¹, Wei An¹, Qianqian Liu^1,2

¹State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, China.

Nature communications

|August 15, 2025

概括

具有独特道结构的工程化氧化催化剂在水电解器中促进氧气演变. 这一突破使得高效的生产能够减少的使用,并提高耐用性.

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:

质子交换膜水电解器 (PEMWE) 对于绿色生产至关重要.
高负荷和缓慢的氧演变反应 (OER) 动力学限制了当前PEMWE的效率.
传统的鲁结构氧化纳米催化剂存在性能挑战.

研究的目的:

研究道结构化氧化 (IrO2) 的催化活性,用于氧化演化反应 (OER).
设计具有局部反应性的IrO2催化剂,以提高PEMWE的性能.
为了减少负荷,同时保持高的催化效率和耐用性.

主要方法:

道结构的氧化物纳米催化剂的合成.
催化剂结构和局部反应性的表征.
在质子交换膜水电解器中实现工程催化剂.
在运行条件下的性能评估 (电流密度,电压,温度和稳定性).

主要成果:

道结构的IrO2在道口表现出高度局部化的OER活动,比道墙壁高25倍.
较短的纳米棒优化了活性部位暴露和质量/电子传输.
工程催化剂在1.8V (80°C) 时达到2.0 A cm−2,具有较低的负荷 (0.28 mgIr cm−2).
稳定运行超过1800小时,与传统催化剂相比,其耐用性更强.

结论:

道结构氧化物中的催化热点可以合理地集成到先进的电解系统中.
这种方法显著提高了PEMWE的OER效率和催化剂耐用性.
这些发现为具有成本效益和高性能的绿色生产技术铺平了道路.

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