Superaerophobic Electrode with Metal@Metal‐Oxide Powder Catalyst for Oxygen Evolution Reaction,Advanced Functional Materials

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Superaerophobic Electrode with Metal@Metal‐Oxide Powder Catalyst for Oxygen Evolution Reaction
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2016-06-29 , DOI: 10.1002/adfm.201602116
Jinling He ₁ , Binbin Hu ₁ , Yong Zhao ₁

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A stable and highly active oxygen evolution reaction (OER) electrode is the key for fast and robust O₂ production, which is one of the essential points for various kinds of energy conversion systems, such as water splitting, lithium‐O₂ battery and artificial photosynthesis. Here, superaerophobic electrodes with metal@metal‐oxide powder catalysts are shown, which demonstrate high and stable OER activity. The active‐site‐density of metal@metal‐oxide catalysts is increased over one order of magnitude than those of pure metal oxides due to the large enhancement of electrical conductivity, revealing the substantial enhancement of electrochemical OER kinetics. Furthermore, the superaerophobic property of electrodes is favorable for fast O₂ desorption, which improves electrochemical active surface area (EASA) during OER. The superaerophobic electrode with metal@metal‐oxide powder catalysts provides the new insight for increase of active‐site‐density and EASA simultaneously, which are the key factors to determine the activity of OER electrode.

中文翻译：

带有金属@金属氧化物粉末催化剂的超好氧电极用于析氧反应

稳定，高活性的氧气析出反应（OER）电极是快速，稳健地生产O ₂的关键，这是各种能量转换系统（如水分解，锂O ₂电池和人造水）的基本要点之一光合作用。在这里，显示了带有金属@金属氧化物粉末催化剂的超好氧电极，它们显示出高而稳定的OER活性。由于金属的电导率大大提高，因此金属@金属氧化物催化剂的活性中心密度比纯金属氧化物的活性中心密度提高了一个数量级，从而揭示了电化学OER动力学的显着提高。此外，电极的超疏水性能有利于快速O ₂脱附，可提高OER期间的电化学活性表面积（EASA）。带有金属@金属氧化物粉末催化剂的超好氧电极为同时增加活性位密度和EASA提供了新的见识，这是确定OER电极活性的关键因素。

更新日期：2016-06-29

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