Challenges and strategies of chlorine inhibition in anode systems for seawater electrolysis

IF 10.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Science China Chemistry Pub Date : 2024-08-07 DOI:10.1007/s11426-024-2121-0

Chuqiang Huang, Zhouzhou Wang, Shaojun Cheng, Yunpeng Liu, Binglu Deng, Shaoyi Xu, Luo Yu, Ying Yu

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Abstract

Seawater electrolysis for green hydrogen production is one of the key technologies for achieving carbon neutrality. However, in anode systems, the chloride ions (Cl⁻) in seawater will trigger an undesired chlorine evolution reaction (CER) that competes with an oxygen evolution reaction (OER), resulting in inferior OER activity and selectivity. Besides, the corrosive Cl⁻ and its derivative products will corrode anodes during seawater electrolysis, leading to poor stability. Therefore, great efforts have been devoted to developing efficient strategies for chlorine inhibition to improve the activity, selectivity, and stability of anode materials. Herein, focusing on chlorine inhibition, we present a mini review to comprehensively and concisely summarize the recent progress in anode systems for boosting seawater electrolysis. In particular, two strategies of physical and chemical regulation to inhibit Cl⁻ are summarized in some representative cases. Finally, some challenges and future opportunities in anode systems for seawater electrolysis are prospected. This mini review aims to shed light on designing highly efficient anode materials for seawater electrolysis.

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海水电解阳极系统抑制氯的挑战和策略

用于绿色制氢的海水电解是实现碳中和的关键技术之一。然而，在阳极系统中，海水中的氯离子（Cl-）会引发不受欢迎的氯进化反应（CER），与氧进化反应（OER）竞争，导致 OER 活性和选择性降低。此外，具有腐蚀性的 Cl- 及其衍生物产物会在海水电解过程中腐蚀阳极，导致稳定性变差。因此，人们一直致力于开发有效的氯抑制策略，以提高阳极材料的活性、选择性和稳定性。在此，我们以氯抑制为重点，进行了一次小型综述，全面而简明地总结了用于促进海水电解的阳极系统的最新进展。特别是在一些具有代表性的案例中，总结了抑制 Cl- 的物理和化学调节两种策略。最后，展望了海水电解阳极系统面临的一些挑战和未来的机遇。这篇微型综述旨在阐明如何设计用于海水电解的高效阳极材料。

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.