Dopamine-Assisted Coral Films of Cobalt as Bifunctional Electrodes for Overall Water Splitting,Energy Technology

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Dopamine-Assisted Coral Films of Cobalt as Bifunctional Electrodes for Overall Water Splitting
Energy Technology ( IF 3.6 ) Pub Date : 2021-09-16 , DOI: 10.1002/ente.202100264
Jyothi S. Doddamani ₁ , Sajeeda Shaikh ₁ , Mohammad Hussain Kasim Rabinal ₁

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Coral-type cobalt nanostructures are electrodeposited on a dopamine-modified nickel plate under ordinary conditions. The deposited electrodes are studied for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) as bifunctional electrodes for overall water splitting. These electrodes show overpotentials of 300 and 290 mV for OER and HER respectively, at a benchmark current density of 10 mA cm⁻². In case of OER, the absence of dopamine gives higher overpotential and exfoliation of Co coating. In the presence of dopamine, the electrodes show lower overpotential and better long-term stability for both HER and OER for overall water splitting. Hence, the present Ni−dopamine−Co electrode interface can be a better bifunctional electrode for the overall water splitting reaction.

中文翻译：

钴的多巴胺辅助珊瑚膜作为双功能电极用于整体水分解

珊瑚型钴纳米结构在普通条件下电沉积在多巴胺改性的镍板上。研究了沉积电极的析氧反应（OER）和析氢反应（HER）作为用于整体水分解的双功能电极。在 10 mA cm ^-2的基准电流密度下，这些电极对于 OER 和 HER 分别显示 300 和 290 mV 的过电位。在 OER 的情况下，不存在多巴胺会产生更高的过电位和 Co 涂层的剥落。在多巴胺存在的情况下，电极对于 HER 和 OER 的整体水分解表现出较低的过电位和更好的长期稳定性。因此，目前的 Ni-dopamine-Co 电极界面可以成为整个水分解反应更好的双功能电极。

更新日期：2021-11-04

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