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在电催化氧的进化和稳定中通过兴奋剂诱导的火鲁酸盐的绝缘器转换诱导的降解

Tongtong Liu^1,2, Hengyu Guo^1,2, Qingren Zhang^1,2

¹State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.

Angewandte Chemie (International ed. in English)

|July 23, 2024

概括

基于的火对聚合物电解质膜电解剂有前途,但由于氧化演化反应失活而受到影响. 置换稳定了结构,防止了绝缘体过渡,提高了催化剂的耐用性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

基于的火是聚合物电解质膜 (PEM) 电解剂中二氧化的潜在替代品.
在氧化演化反应 (OER) 过程中了解这些火的失活机制对于它们的实际应用至关重要.

研究的目的:

研究OER期间Y2Ru2O7-δ的结构和电化学变化.
为了阐明在Y2Ru2O7-δ.中OER无活化的原因.
开发一种使用Ir替代的基于Ru的化物稳定策略.

主要方法:

在OER期间监测Y2Ru2O7-δ的结构演变和电化学行为.
分析了Ir替代型火中的电子结构和结合.
评估修改后的催化剂的OER性能和稳定性.

主要成果:

由于原子重新排列,Y2Ru2O7-δ经历了绝缘体过渡,导致OER无活化.
在Y2Ru2O7-δ中进行替代减轻了Jahn-Teller效应和原子重排.
具有Ir替代的Y2Ru2O7-δ显著提高了OER稳定性和PEM耐久性.

结论:

Y2Ru2O7-δ的OER降解与由格子重新排列引起的绝缘体过渡有关.
替代能通过改变电子状态和抑制有害的结构变化,有效地稳定基于的火.
这项工作提供了对电化学设备中强大的基于Ru的氧进化反应催化剂的催化剂设计的见解.

关键词:

降解机制的降解机制电子的相关性与电子的相关性氧气进化反应反应氧气进化反应石化鲁酸盐石化鲁酸盐旋转两极化旋转两极化

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