Composition Engineering–Triggered Bifunctionality of Free‐Standing Coral‐Like 1T‐MoS2 for Highly Efficient Overall Water Splitting,Energy Technology

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Composition Engineering–Triggered Bifunctionality of Free‐Standing Coral‐Like 1T‐MoS2 for Highly Efficient Overall Water Splitting
Energy Technology ( IF 3.6 ) Pub Date : 2020-05-09 , DOI: 10.1002/ente.202000268
Xiaoqing Ding _{1,

2} , Xitao Li ₁ , Xinding Lv ₁ , Yan-Zhen Zheng _{1,

3} , Qibing Wu ₂ , Haiyang Ding _{4,

5} , Jiaojiao Wu ₁ , Ran Li ₁ , Xia Tao ₁

Affiliation

Metallic‐phase 1T‐MoS₂ with its good electronic conductivity and abundant active sites attracts more attention for energy conversion and storage. However, developing a high‐performance bifunctional 1T‐MoS₂ for overall water splitting still is a challenge. Herein, a composition (Fe and Mn)‐engineering approach that is capable of triggering efficient hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) bifunctionality into coral‐like 1T‐MoS₂ nanorods for overall water splitting is reported. The results demonstrate that composition engineering induces rich crystal defects and electronic structure variation of the freestanding coral‐like 1T‐MoS₂, leading to outstanding HER (overpotential of 34.1 mV at 10 mA cm⁻²) and OER (overpotential of 220.0 mV at 50 mA cm⁻²) activity and excellent stability in alkaline media. The facile composition‐engineering activation strategy is also feasible to endow the other transition metal dichalcogenides with dual/multiple functionality.

中文翻译：

成分工程–独立式珊瑚状1T-MoS2触发的双功能，可实现高效的总水分解

金属相1T-MoS ₂具有良好的电子导电性和丰富的活性位点，在能量转换和存储方面引起了更多关注。但是，开发用于整体水分解的高性能双功能1T-MoS ₂仍然是一个挑战。本文报道了一种能够触发有效的氢释放反应（HER）和氧释放反应（OER）双功能成珊瑚状1T-MoS ₂纳米棒的成分（铁和锰）工程方法，用于整体水分解。结果表明，成分工程可诱导独立的珊瑚状1T-MoS ₂产生丰富的晶体缺陷和电子结构变化，从而导致出色的HER（10 mA cm时34.1 mV的超电势）^-2）和OER（在50 mA cm ^-2时的220.0 mV的超电势）活性和在碱性介质中的优异稳定性。简便的成分工程活化策略也可以使其他过渡金属二卤化物具有双重/多重功能。

更新日期：2020-07-02

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