Segmented catalyst layer with varied catalyst loading to improve the cost performance of proton exchange membrane electrolysis cell, a numerical investigation

被引:1
作者
Wu, Qingquan [1 ]
Wu, Baoxin [1 ]
Xu, Xinhai [1 ]
Dong, Guangzhong [1 ]
Zhang, Mingming [1 ]
Leung, Dennis Y. C. [2 ]
Wang, Yifei [1 ]
机构
[1] Harbin Inst Technol, Sch Mech Engn & Automat, Shenzhen, Peoples R China
[2] Univ Hong Kong, Dept Mech Engn, Hong Kong, Peoples R China
关键词
Hydrogen production; Water electrolysis; PEMEC; Segmented catalyst layer; Catalyst loading distribution; Numerical simulation; IRIDIUM OXIDE LOADINGS; PEM WATER ELECTROLYZER; FLOW-FIELD; OXYGEN EVOLUTION; CURRENT-DENSITY; HYDROGEN; SYSTEM; DURABILITY; SIMULATION; CHALLENGES;
D O I
10.1016/j.ijhydene.2024.09.364
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this work, a steady-state, three-dimensional and non-isothermal numerical model for a proton exchange membrane electrolysis cell (PEMEC) is established. Based on this model, the distribution of catalyst loading is specifically designed according to the flow characteristics of both parallel and serpentine channels. In general, the catalyst loading is progressively reduced from inlet to outlet along the flow direction to match the local water content, leading to an innovative segmented catalyst layer which has not been studied yet for PEMEC applications. The electrochemical behavior of different segmentation schemes is investigated by comparing their polarization curves normalized by either electrode area or catalyst loading, while other physical fields such as velocity, pressure, water mole fraction and temperature distributions are also characterized. The numerical results reveal that a reasonable distribution of catalyst can reduce its amount of usage while still maintaining most of the PEMEC performance. In other words, the cost performance is significantly improved. This is mainly attributed to the full use of uneven water distribution in the flow channel, which improves the catalyst utilization efficiency significantly. This strategy is proved to be effective for both serpentine and parallel channels, ensuring a broad application prospect.
引用
收藏
页码:401 / 412
页数:12
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