Particle size distribution degradation model for PEM fuel cell Pt/C catalyst based on population balance equation
发布时间：2024-10-22
点击次数：
- 影响因子：
- 4.1
- DOI码：
- 10.1016/j.ces.2024.120590
- 发表刊物：
- Chemical Engineering Science
- 关键字：
- Proton exchange membrane fuel cell; Catalyst durability; Nanoparticle kinetics; Particle size distribution; Population balance equation
- 摘要：
- Electrochemically active surface area (ECSA) loss is the main cause of proton exchange membrane fuel cell performance degradation. It involves interactions between kinetics of Pt particle size distribution (PSD) and several degradation mechanisms, including particle dissolution, redeposition, coagulation and detachment from carbon support. A population balance equation was established to relate the PSD evolutions with the loss of ECSA. Dimensionless Damkohler ¨ numbers (Dardp, Dacgl, Dadet) were defined to characterize the relative magnitudes between different degradation rates. Systematic studies revealed the dimensionless transition criterions form dissolution limit to other degradation modes. Sensitivity analysis indicated the redisposition rate and dissolution rate were the two most influential parameters. The initial parameters, rather than the initial function type of the unimodal distribution, is the dominating factors for PSD degradation process. This study provides theoretical foundation for optimization of catalyst layer design and durability.
- 论文类型：
- 期刊论文
- 通讯作者：
- Yujie Ding
- 学科门类：
- 工学
- 一级学科：
- 化学工程与技术
- 文献类型：
- J
- 卷号：
- 300
- 页面范围：
- 120590
- 是否译文：
- 否
- 发表时间：
- 2024-01-01
- 收录刊物：
- SCI