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Hydrogen production by acid-base amphiprotic water electrolysis using polybenzimidazole membranes

Authors： LIU Shuai, LEI Qing, WANG Baoguo

Units： The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P R China

KeyWords： water electrolysis, cathodic polarization, polybenzimidazole, water dissociation, quaternary ammonium base

ClassificationCode：TQ151.1

year,volume(issue):pagination： 2018,38(5):1-7

Abstract：

In order to reduce energy consumption in electrolytic hydrogen production, a novel method named acid-base amphiprotic water electrolysis using membranes is proposed. The membrane separates acidic electrolyte and alkaline electrolyte. Hydrogen-evolving reactions (HER) occurs in acidic electrolyte which reduces the polarization and enhances the HER materials stability. The core issue is to suppress acid-base neutralization. The positive ions in quaternary ammonium base have larger ion radius than potassium ion which is beneficial to hinder ions permeability. Polybenzimidazole membranes were selected due to its stability for acidic and alkaline solution. In this paper, the relationship between ion species, concentration and diffusion are analyzes in detail. The performance and stability of membranes are discussed.

Funds：

国家自然科学基金（项目批准号：21776154）。中国博士后科学基金（项目批准号：2017M610913）

AuthorIntro：

第一作者简介：刘帅（1987-），男，籍贯：山东淄博，职称：博士后，研究方向：离子分离膜，E-mail：liushuai99@mail.tsinghua.edu.cn 通讯作者: 王保国教授，E-mail：bgwang@tsinghua.edu.cn

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