多物理场耦合的碱性电解水制氢 动态反应机制分析

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引用格式：，等. 多物理场耦合的碱性电解水制氢动态反应机制分析[J]. 当代化工，2026,55（4）：922-931.

WU Hao, YU Shuang'en, WANG Cuiping, et al. Analysis on Dynamic Reaction Mechanisms of Alkaline Water Electrolysis for Hydrogen Production via Multiphysics Coupling[J]. Contemporary Chemical Industry, 2026, 55(4): 922-931.

吴昊 1 ，于双恩 2 ，王翠萍 1 ，薛云鹏 2 ，郝沛 1 ，李博文 1 ，李博煜 1

（1. 250002；

2. 洁能源研究院，北京 102211）

中图分类号：TQ035；O351.2 文献标志码：A 文章编号：1671-0460（2026）04-0922-10

Analysis on Dynamic Reaction Mechanisms of Alkaline Water Electrolysis for Hydrogen Production via Multiphysics Coupling

WU Hao 1, YU Shuang'en 2, WANG Cuiping 1, XUE Yunpeng 2, HAO Pei 1, LI Bowen 1, LI Boyu 1

Shandong Guohua Shidai Investment Development Co., Ltd., CNNE, Jinan Shandong 250002, China; 2. National Institute of Clean-and-Low-Carbon Energy, CNNE, Beijing 102211, China)

Abstract: Regarding the internal reaction mechanism of the electrolytic cell and the main structures such as electrode plates, flow channels, diffusion electrodes and diaphragms, a three-dimensional stack unit model of electric field-temperature field-heat transfer field was built, the model reliability was validated through polarization curves and gas volume fraction distribution. The effects of current density, flow rate, and pressure on energy efficiency, pressure drop, and gas volume fraction distribution were systematically analyzed. Based on real wind power fluctuation frequency data, the reaction mechanism of hydrogen production by alkaline water electrolysis under fluctuating power conditions was explored. The results demonstrated that, higher current density reduced hydrogen production energy efficiency; the volume fraction of gas in the flow channel decreased with increasing of pressure; when comprehensively considering factors such as gas volume fraction, temperature difference between inlet and outlet, energy consumption, and catalyst stability, there existed an optimal solution for the electrolyte flow rate. Under power fluctuations, boundary voltage sensitivity rose at low current densities, temperature exhibited transient overshoot, and energy efficiency correlated inversely with current density variations.

Keywords: Alkaline water electrolysis; Hydrogen production; Multiphysics coupling; Numerical simulation; Gas distribution; Dynamic fluctuation; Reaction mechanism

随着全球能源需求的持续增长，化石能源的过度开采已成为常态，导致当今人类社会面临能源短缺与气候变化的双重挑战。（剩余21229字）