Degradation of Organic Cations under Alkaline Conditions
Degradation of Organic Cations under Alkaline Conditions
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DOI：
10.1021/acs.joc.0c02051
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发表时间：
2021-01-01
影响因子：
3.6
通讯作者：
Coates, Geoffrey W.
中科院分区：
文献类型：
--
作者：
You, Wei;Hugar, Kristina M.;Coates, Geoffrey W.
了解有机阳离子在碱性条件下的降解机理，对于开发耐用的碱能转换装置是极其重要的。阳离子是碱性阴离子交换膜(AAEM)中的关键官能团，而AAEM又是碱性燃料电池中传导氢氧阴离子的关键成分。以前，我们已经建立了一个标准的方案来评估阳离子在80℃的KOH/CD3OH溶液中的碱性稳定性。在这里，我们使用该方案比较了26种模型化合物，包括苄基铵、四烷基铵、螺环铵、咪唑、苯并咪唑、三氮唑、吡啶、胍和磷阳离子。我们的目标不仅是评估它们的降解速度，而且还要确定它们的降解途径，并导致具有更好的碱性稳定性的阳离子的进步。
Understanding the degradation mechanisms of organic cations under basic conditions is extremely important for the development of durable alkaline energy conversion devices. Cations are key functional groups in alkaline anion exchange membranes (AAEMs), and AAEMs are critical components to conduct hydroxide anions in alkaline fuel cells. Previously, we have established a standard protocol to evaluate cation alkaline stability within KOH/CD3OH solution at 80 degrees C. Herein, we are using the protocol to compare 26 model compounds, including benzylammonium, tetraalkylammonium, spirocyclicammonium, imidazolium, benzimidazolium, triazolium, pyridinium, guanidinium, and phosphonium cations. The goal is not only to evaluate their degradation rate, but also to identify their degradation pathways and lead to the advancement of cations with improved alkaline stabilities.