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定制PtCo合金中的共分布,以提高燃料电池中的氧降解反应活性和耐久性

Jinhee Lee^1,2, Miso Kim¹, Bongho Lee¹

¹Carbon Inc., 4, Techno 2-ro, Yoseong-gu, Daejeon 34015, Republic of Korea.

Nanomaterials (Basel, Switzerland)

|May 13, 2025

概括

新的混合- (PtCo) 催化剂提高了聚合物电解质膜燃料电池 (PEMFC) 的性能和耐用性. 地下丰富增强了这些先进的燃料电池催化剂的氧降解反应 (ORR) 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:

聚合物电解质膜燃料电池 (PEMFC) 对于清洁能源至关重要,它们严重依赖 (Pt) 和Pt合金催化剂.
现有的PtCo催化剂由于结构限制而面临耐用性挑战,阻碍了实际应用.

研究的目的:

为了合成新的碳支持混合PtCo合金催化剂 (H-PtCo),提高活性和耐用性.
调查原子分布对PEMFCs催化性能的影响.

主要方法:

通过减少Co前体到预先形成的Pt纳米粒子来合成H-PtCo催化剂.
使用传输电子显微镜 (TEM) 来分析Co.分布的元素映射.
电化学表征包括线性扫描电压测量 (LSV) 和加速耐久性测试 (ADT).
单燃料电池的性能和耐久性测试.

主要成果:

H-PtCo 催化剂在地表附近呈现出高度的 Co 原子,这归因于合规沉积和高温处理.
与传统的PtCo合金 (C-PtCo) 相比,H-PtCo催化剂显示出更高的氧降解反应 (ORR) 活性和稳定性.
单细胞测试证实H-PtCo催化剂的性能和耐用性比C-PtCo和Pt催化剂显著提高.

结论:

原子的战略分布,特别是地下缩,对于提高PtCo合金催化剂的催化效率和长期稳定性至关重要.
H-PtCo催化剂代表了改善PEMFC技术的有希望的进步.

关键词:

这是一种PtCo合金.合体Pt纳米颗粒的使用.接近表面的结构结构.聚合物电解质膜燃料电池燃料电池的使用方法

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