Amorphous Iron(III)‐Borate Nanolattices as Multifunctional Electrodes for Self‐Driven Overall Water Splitting and Rechargeable Zinc–Air Battery,Small

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Amorphous Iron(III)‐Borate Nanolattices as Multifunctional Electrodes for Self‐Driven Overall Water Splitting and Rechargeable Zinc–Air Battery
Small ( IF 13.0 ) Pub Date : 2018-09-27 , DOI: 10.1002/smll.201802829
Weinan Zhao ₁ , Tao Xu ₁ , Tao Li ₂ , Yuankun Wang ₃ , Hui Liu ₁ , Jianze Feng ₁ , Shujiang Ding ₃ , Zhongtao Li ₁ , Mingbo Wu ₁

Affiliation

Highly stable and low‐cost electrocatalysts with multi‐electrocatalytic activities are in high demand for developing advanced energy conversion devices. Herein, a unique trifunctional amorphous iron‐borate electrode is developed, which is capable of boosting hydrogen evolution, oxygen evolution, and oxygen reduction reactions simultaneously. The amorphous iron borate can self‐assemble into well‐defined nanolattices on electrode surface through a facile hydrothermal process, which possess more active sites and charge transfer pathways. As a result, the asymmetry overall water‐splitting cell that adopts the amorphous electrodes as anode and cathode can be driven at 1.56 V with the current density of 10 mA cm⁻², which is lowest in state‐of‐the‐art catalysts. Moreover, the water‐splitting devices can be powered by a two‐series‐connected amorphous electrode–based zinc–air battery with high stability and Faradic efficiency (96.3%). The result can offer a potential and promising alternative way to develop metal‐borate electrode for multifunctional applications.

中文翻译：

非晶态硼酸铁（III）纳米晶作为多功能电极，用于自驱动总水分解和可充电锌空气电池

对于开发先进的能量转换装置，对具有多电催化活性的高度稳定和低成本的电催化剂有很高的要求。本文开发了一种独特的三官能无定形硼酸铁电极，该电极能够同时促进氢释放，氧释放和氧还原反应。无定形硼酸铁可以通过便捷的水热过程在电极表面自组装成明确的纳米晶格，该晶格具有更多的活性位点和电荷转移途径。结果，采用非晶电极作为阳极和阴极的不对称整体水分解池可以在1.56 V的电流下以10 mA cm ^-2的电流进行驱动。，这是目前最先进的催化剂中最低的。此外，水分解装置可以由两个串联的基于非晶电极的锌-空气电池供电，具有高稳定性和法拉第效率（96.3％）。该结果可为开发用于多功能应用的金属硼酸盐电极提供一种潜在且有前途的替代方法。

更新日期：2018-09-27

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