In‐Situ Activated NiFePBA‐FeOOH Electrocatalyst for Oxygen Evolution Reaction and Zinc‐Air Battery,ChemistrySelect

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In‐Situ Activated NiFePBA‐FeOOH Electrocatalyst for Oxygen Evolution Reaction and Zinc‐Air Battery
ChemistrySelect ( IF 1.9 ) Pub Date : 2021-04-21 , DOI: 10.1002/slct.202100911
Licheng Wei ₁ , Yufei Zhang ₁ , Yang Yang ₁ , Minghui Ye ₁ , Chengchao Li ₁

Affiliation

Developing low‐price, highly efficient and durable electrocatalysts for sluggish oxygen evolution reaction (OER) is still a significant challenge for metal‐air batteries and electrochemical water splitting technology. Here, cost‐effective OER catalyst composing of nickel‐iron Prussian blue analogue and iron oxyhydroxide (NiFePBA‐FeOOH) was successfully prepared by facile hydrothermal method. Designed NiFePBA‐FeOOH catalyst exhibits superior OER performance with low overpotential, small Tafel slope and stable durability. Systematic investigations with in‐situ Raman and Transmission electron microscope reveal that the as‐prepared catalyst has undergone in‐situ electrochemical transformation to generate real catalytic active species of nickel and iron oxyhydroxides. Particularly, the assembled zinc‐air battery with NiFePBA‐FeOOH catalyst also displays a long‐term lifetime of 165 h only presenting a slight increase in voltage gap. Additionally, the successful exploration of cobalt‐iron PBAs with iron oxyhydroxides further demonstrates the universality of PBAs‐oxyhydroxides composites for energy storage and conversion applications.

中文翻译：

用于氧气析出反应和锌空气电池的原位活化NiFePBA-FeOOH电催化剂

对于金属空气电池和电化学水分解技术而言，开发低价，高效，耐用的电催化剂以解决缓慢的析氧反应（OER）仍然是一项重大挑战。在此，通过简便的水热法成功制备了由镍铁普鲁士蓝类似物和羟基氧化铁（NiFePBA-FeOOH）组成的经济高效的OER催化剂。设计的NiFePBA-FeOOH催化剂具有出众的OER性能，低过电势，小的Tafel斜率和稳定的耐用性。用原位拉曼光谱和透射电子显微镜进行的系统研究表明，所制备的催化剂已进行了原位反应电化学转化生成真正的催化活性物质镍和羟基氧化铁。特别是，使用NiFePBA-FeOOH催化剂组装的锌空气电池还显示165小时的长期使用寿命，但电压间隙略有增加。此外，用羟基氧化铁对钴铁PBA的成功探索进一步证明了PBAs羟基氧化物复合材料在能量存储和转换应用中的通用性。

更新日期：2021-04-21

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