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Pd/MnO₂:Pd/C 在AEMFC中用于高效和氧电极反应的电催化剂

Ivan Cruz-Reyes¹, Balter Trujillo-Navarrete¹, Moisés Israel Salazar-Gastélum¹

¹Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Centro de Graduados e Investigación en Química, Boulevard Alberto Limón Padilla S/N, Mesa de Otay, Tijuana 22000, Baja California, Mexico.

Nanomaterials (Basel, Switzerland)

|January 9, 2026

概括

一种新的混合电催化剂 (Pd/MnO2:Pd/C) 显著提高了离子交换膜燃料电池 (AEMFC) 的性能. 这种耐用的双功能催化剂在AEMFC应用中显示出优越的氧降解和氧化活性.

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:

开发具有成本效益和耐用的电催化剂对于推进阳离子交换膜燃料电池 (AEMFC) 至关重要.
基于的催化剂是有希望的,但需要优化的支持材料来增强双功能活动.

研究的目的:

为了评估支持β-MnO2,火山碳 (C) 和混合混合物 (Pd/MnO2:Pd/C) 作为双功能电极的 Pd 基催化剂.
调查MnO2和碳支对氧降解反应 (ORR) 和氧化反应 (HOR) 催化剂性能的协同效应.

主要方法:

通过化学还原进行催化剂合成.
使用TGA,ICP-OES,TEM,BET和XRD进行表征.
使用旋转盘电极 (RDE) 研究和AEMFC测试进行电化学评估.

主要成果:

混合Pd/MnO2:Pd/C与单个支相比,对ORR和HOR都表现出更高的活性和动力学.
根据AEMFC的测试,该混合动力实现了128.0mW cm−2 (阴极) 和221.7mW cm−2 (阳极).
混合催化剂在3000个循环后保持了99%以上的活性,证明了出色的耐用性.

结论:

碳支所促进的Pd纳米粒子和MnO2之间的协同相互作用提高了催化剂的性能和稳定性.
混合Pd/MnO2:Pd/C是一种有前途的双功能和耐用电催化剂,用于AEMFC应用.
二氧化作为结构间隔剂,改善质量传输和稳定性,尽管仅仅对HOR是不活跃的.

关键词:

在AEMFC,我们可以看到AEMFC.霍尔 (HOR) 是一个小时.在Pd/MnO2中.阳极是一种极.碳 Vulcan 火山是一个火山.

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