In Situ Electrodeposition of Cobalt Sulfide Nanosheet Arrays on Carbon Cloth as a Highly Efficient Bifunctional Electrocatalyst for Oxygen Evolution and Reduction Reactions,ACS Applied Materials & Interfaces

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In Situ Electrodeposition of Cobalt Sulfide Nanosheet Arrays on Carbon Cloth as a Highly Efficient Bifunctional Electrocatalyst for Oxygen Evolution and Reduction Reactions
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-07-27 00:00:00 , DOI: 10.1021/acsami.8b10645
Bin Liu ₁ , Shengxiang Qu , Yue Kou , Zhi Liu ₁ , Xu Chen ₁ , Yating Wu ₁ , Xiaopeng Han , Yida Deng , Wenbin Hu , Cheng Zhong

Affiliation

As one of the advanced cobalt-based materials, cobalt sulfides with novel architecture have attracted huge interest due to the low cost, easy availability, and promising bifunctional activity for both the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), which is essential for next-generation energy storage devices. Herein, we demonstrated a facile and clean electrochemical technique to directly synthesize CoS nanosheets with high purity onto the surface of carbon cloth, and a quick thermal treatment was performed to further improve the catalytic performance (CoS-A). This novel electrochemical technique avoids the use of the binder, surfactant, and other organic additives, which may cause poor electric conductivity as well as undesirable surface wettability, exhibiting great potential of the large-scale applications. The obtained CoS-A exhibits a superior electrocatalytic performance for the OER and ORR, with a high ORR current density (−1.51 mA cm^–2 at 0.2 V), considerable OER current density (148 mA cm^–2 at 1.9 V), and excellent durability in continuous measurement for over 12 h. The approach offers a powerful yet simple method to control the phase, composition, and morphology of a highly active CoS catalyst, which provides a new idea for the design of high-performance catalysts.

中文翻译：

碳布上硫化钴纳米片阵列的原位电沉积作为一种高效的双功能电催化剂，用于氧的释放和还原反应

作为一种先进的钴基材料，具有新颖结构的硫化钴因其低成本，易获得性以及对放氧反应（OER）和氧还原反应（ORR）的双功能活性而备受关注。对于下一代储能设备至关重要。在本文中，我们展示了一种简便且清洁的电化学技术，可将高纯度的CoS纳米片直接合成到碳布表面上，并进行了快速热处理以进一步提高催化性能（CoS-A）。这种新颖的电化学技术避免了使用粘合剂，表面活性剂和其他有机添加剂，因为粘合剂，表面活性剂和其他有机添加剂可能会导致导电性差以及不希望的表面润湿性，从而具有大规模应用的潜力。在0.2 V时为^–2），相当大的OER电流密度（在1.9 V时为148 mA cm ^–2），以及连续测量超过12小时的出色耐久性。该方法提供了一种强大而简单的方法来控制高活性CoS催化剂的相，组成和形态，这为高性能催化剂的设计提供了新思路。

更新日期：2018-07-27

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