A Permselective CeOx Coating To Improve the Stability of Oxygen Evolution Electrocatalysts,Angewandte Chemie International Edition

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A Permselective CeOx Coating To Improve the Stability of Oxygen Evolution Electrocatalysts
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-01-05 , DOI: 10.1002/anie.201712121
Keisuke Obata ₁ , Kazuhiro Takanabe ₁

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Highly active NiFeO_x electrocatalysts for the oxygen evolution reaction (OER) suffer gradual deactivation with time owing to the loss of Fe species from the active sites into solution during catalysis. The anodic deposition of a CeO_x layer prevents the loss of such Fe species from the OER catalysts, achieving a highly stable performance. The CeO_x layer does not affect the OER activity of the catalyst underneath but exhibits unique permselectivity, allowing the permeation of OH⁻ and O₂ through while preventing the diffusion of redox ions through the layer to function as a selective O₂‐evolving electrode. The use of such a permselective protective layer provides a new strategy for improving the durability of electrocatalysts.

中文翻译：

选择性渗透CeOx涂层可改善析氧电催化剂的稳定性

用于氧释放反应（OER）的高活性NiFeO _x电催化剂会随着时间的流逝而逐渐失活，这是因为在催化过程中，Fe物种从活性位点流失到溶液中。CeO _x层的阳极沉积防止了OER催化剂中此类Fe的流失，从而实现了高度稳定的性能。所述的CeO _X层不影响催化剂的下方，但表现出独特的选择渗透性的OER活性，允许OH的渗透^-和O ₂通过，同时防止氧化还原离子的扩散通过该层到用作选择性O- ₂不断发展的电极。这种渗透选择性保护层的使用提供了改善电催化剂耐久性的新策略。

更新日期：2018-01-05

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