The Ammonia Adsorption and Desorption Behavior of Nafion.

IF 3.3 4区工程技术 Q2 CHEMISTRY, PHYSICAL

Membranes Pub Date : 2025-05-14 DOI:10.3390/membranes15050149

Dominik Sachse, Andreas Glüsen, Klaus Wippermann, Martin Müller, Uwe Rau, Ralf Peters

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Abstract

The electrochemical nitrogen reduction reaction (eNRR) for electrochemical ammonia (NH₃) synthesis is considered a promising alternative to the energy-intensive and highly CO₂-emitting Haber-Bosch process. In numerous experiments, the Nafion membrane has been used as an electrolyte or separator. However, Nafion adsorbs and desorbs NH₃, leading to erroneous measurements and making reproducibility extremely difficult. This study systematically investigates the interaction between NH₃ and Nafion, underscoring the strength of the interaction between ammonium-ions (NH₄⁺) and protons (H⁺). We found that minute quantities of synthesized NH₃ are prone to persist within the membrane, albeit without affecting the ion conductivity and resistivity of Nafion. Consequently, the removal of NH₃ from the membrane can occur under conditions where synthesis is not viable. The objective of this work is to heighten awareness regarding the interaction between NH₃ and Nafion and contribute to the attainment of reliable and reproducible outcomes in eNRRs.

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Nafion对氨的吸附和解吸行为。

电化学氮还原反应（eNRR）用于电化学氨（NH3）合成被认为是一种有前途的替代能源密集型和高二氧化碳排放的Haber-Bosch工艺。在许多实验中，Nafion膜被用作电解质或分离器。然而，Nafion吸附和解吸NH3，导致错误的测量，使重现性极其困难。本研究系统地研究了NH3与Nafion之间的相互作用，强调了铵离子（NH4+）与质子（H+）之间相互作用的强度。我们发现，尽管不影响Nafion的离子电导率和电阻率，但微量的合成NH3易于在膜内持续存在。因此，从膜上去除NH3可以发生在合成不可行的条件下。这项工作的目的是提高对NH3和Nafion之间相互作用的认识，并有助于在enrr中获得可靠和可重复的结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Membranes Chemical Engineering-Filtration and Separation

CiteScore

6.10

自引率

16.70%

发文量

1071

审稿时长

11 weeks

期刊介绍： Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.