标题: Advanced and Durable Self-Standing MoC-Mo2C Electrode for Alkaline Hydrogen Evolution in Chlor-alkali Electrolysis

作者: Zhang, Y (Zhang, Yu); Liu, XL (Liu, Xianglin); Li, WT (Li, Wenting); Liu, W (Liu, Wei); Yin, HY (Yin, Huayi); Wang, DH (Wang, Dihua)

来源出版物: ACS SUSTAINABLE CHEMISTRY & ENGINEERING DOI: 10.1021/acssuschemeng.3c01721 提前访问日期: JUN 2023

摘要: A MoC-Mo2C electrode preparedby the electro-carbonizationin molten salt of Li2CO3-K2CO3 demonstrates excellent performance for the HER in a simulatedchlor-alkali electrolyzer.

Energy saving is crucial for the modern chlor-alkaliindustry toreduce its carbon footprint and production cost. Herein, an efficientMoC-Mo2C electrode synthesized in molten salt was reportedfor the alkaline hydrogen evolution reaction (HER) in a simulatedchlor-alkali cell. The MoC-Mo2C electrode displays a lowoverpotential of 179 mV at 500 mA cm(-2), which ismuch lower than that of a low-carbon steel electrode (eta(500) = 436 mV) for the HER in chlor-alkali conditions (i.e.,3 M NaOH + 3 M NaCl at 85 degrees C), and it exhibited high stabilitywithin 100 h. Furthermore, the effects of NaOH and NaCl concentrationsand operating temperatures on its performance for the HER were systematicallyinvestigated. The honeycomb-like porous morphology, good hydrophilicity,and unique electronic structure of the electrode are the reasons forits excellent HER activity and durability. This work extends a novelexcellent and cost-affordable self-standing MoC-Mo2C HERelectrode for application in the chlor-alkali industry, which wouldgreatly reduce the energy consumption of the process.

作者关键词: molten salt electrolysis; self-standing MoC-Mo2C electrode; alkaline HER; chlor-alkali industry; over stability

地址: [Zhang, Yu; Liu, Xianglin; Li, Wenting; Liu, Wei; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

通讯作者地址: Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址: wangdh@whu.edu.cn

影响因子：8.4