摘要
从煤电解过程中的电解液出发,采用线性扫描伏安法(LSV)和恒电压法(I-t),探究了向煤浆中加入KCl、KI和KCl-KI(物质的量比为1∶1)对煤电解制氢过程的影响.实验结果表明:向煤浆中加入KCl和KI均可显著提高煤电解制氢的催化效率,这可能是由于Cl^(-)和I^(-)吸附在煤颗粒表面,煤颗粒更容易向电极迁移,加快了煤颗粒的氧化.Cl^(-)和I^(-)相比,加入I^(-)对煤浆电解效率的提升更大,这是因为I^(-)的还原性比Cl^(-)的低,在煤电解过程与煤颗粒、Fe^(3+)发生了协同氧化反应,提升了反应速率.
Focusing on the electrolyte in the coal electrolysis process,this study investigated the effects of adding KCl,KI,and KCl-KI(with a molar ratio of 1∶1)to coal slurry on the process of hydrogen production by coal electrolysis using linear voltammetry(LSV)and constant voltage method(I-t).The results show that the addition of KCl and KI in coal slurry can significantly improve the catalytic efficiency of hydrogen production from coal electrolysis,which may be due to the adsorption of Cl^(-)and I^(-)are adsorbed on the surface of coal particles,which makes the coal particles migrate more easily to the electrode and accelerate the oxidation of coal particles.Compared with Cl^(-)and I^(-),the addition of I^(-)can improve the efficiency of coal slurry electrolysis,because there ducibility of I^(-)is lower than that of Cl^(-),and I^(-)undergoes a synergistic oxidation reaction with coal particles and Fe^(3+)during the coal electrolysis process,thereby increasing the reaction rate.
作者
于萍
高文暄
马馥颖
刘佳欣
YU Ping;GAO Wenxuan;MA Fuying;LIU Jiaxin(College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)
出处
《沈阳化工大学学报》
2025年第3期244-248,共5页
Journal of Shenyang University of Chemical Technology
基金
辽宁省科技厅项目(2024JH2/102600225)
辽宁省教育厅项目(JYTMS20231484)
沈阳化工大学达标立项项目(2023DB006)。
关键词
煤浆
电解
氢
影响因素
coal slurry
electrolysis
hydrogen
influence factors
