支持碳的结构因素影响燃料电池催化剂油墨中的离子体吸附
Shuhei Yoshino1, Masashi Harada1, Naoki Hasegawa1
1Toyota Central Research and Development Laboratories, Inc., 41-1, Yokomichi, Nagakute-city, Aichi 480-1118, Japan.
ACS applied materials & interfaces
|January 28, 2026
概括
燃料电池中对支持碳 (Pt/C) 的离子体吸附是催化剂层性能的关键. 一个新的通用方程揭示了可访问的表面积,聚合半径和酸群密度如何影响离子体吸附,指导催化剂油墨设计.
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:
- 在支持碳 (Pt/C) 上的离子体吸附对于聚合物电解质燃料电池中的催化剂层结构和性能至关重要.
- 了解控制离子体吸附的Pt/C特性对于优化催化剂油墨和层来说至关重要.
研究的目的:
- 研究催化剂油墨中关键的Pt/C特性与离子体吸附比率 (Γ) 之间的关系.
- 根据Pt/C特征开发一种描述离子体吸附的通用方程.
主要方法:
- 研究了使用不同可访问的特定表面积 (A_acc),聚合半径 (R_agg),表面酸群密度 (ρ_acid) 和重量比的各种碳材料的离子体吸附比率 (Γ).
- 分析了这些 Pt/C 属性与 Γ 之间的相关性,以得出预测模型.
主要成果:
- 离子体吸附比 (Γ) 随着可访问的表面积 (A_acc) 的增加而增加,随着总半径 (R_agg) 的减少而减少.
- Γ取决于酸组密度 (ρ_acid) 和重量比,对于 ρ_acid.观察到一个值效应.
- 一个通用方程得到了推导: Γ = c1*A_acc/[R_agg(1 + c2*exp{-c3[1 - (ρ_acid/ρ_acid^max) ]}) ].
结论:
- 由此得出的通用方程准确地描述了对Pt/C支的离子体吸附.
- 这为设计催化剂油墨中的Pt/C聚合物结构提供了有价值的指导方针,以改善催化剂层特性和燃料电池性能.
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