Surface wettability engineering: CoSx-Ni3S2 nanoarray electrode for improving overall water splitting
Surface wettability engineering: CoSx-Ni3S2 nanoarray electrode for improving overall water splitting
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DOI：
10.1016/j.apcatb.2020.118780
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发表时间：
2020-07
影响因子：
22.1
通讯作者：
Lin-lin Jiang;Ning Yang;Caixia Yang;Xinyi Zhu;Y. Jiang;Xiaoping Shen;Caicai Li;Qingfeng Sun
中科院分区：
文献类型：
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作者：
Lin-lin Jiang;Ning Yang;Caixia Yang;Xinyi Zhu;Y. Jiang;Xiaoping Shen;Caicai Li;Qingfeng Sun
电催化析氢除了有效催化剂的开发外，电极的表面性质也是至关重要的。本文采用水热法制备了CoSx-Ni 3S 2/NF纳米片阵列电极。该电极具有超亲水性和超疏气性，不仅有利于活性中心的暴露，而且对气体扩散具有“气泡屏蔽效应”。因此，该纳米片阵列电极在碱性条件下表现出优异的完全水分解活性，其仅需要1.63 V的低电压来实现100 mA cm-2的电流密度，并且可以在20 mA cm-2下保持20 h的长耐久性。此外，还模拟了在实验室条件下，利用CoSx-Ni 3S 2/NF作为电催化剂，由来自太阳能和风能的电提供动力的制氢。这一工作将从电极结构工程的角度为HER的研究提供一个新的视角。
Besides the development of effective catalysts, surface property of the electrode is also crucial in electrocatalytic hydrogen evolution. Herein, a nanosheet array electrode of CoSx-Ni3S2/NF was designed by a facile hydrothermal process. Particularly, the obtained electrode was endowed with superhydrophilicity and superaerophobicity, which not only facilitates to the exposure of active sites, but also alleviates the “bubble shielding effect” for gas diffusion. Consequently, the nanosheet array electrode demonstrated excellent full water splitting activities in alkaline condition, which only need a low voltage of 1.63 V to achieve a current density of 100 mA cm–2and can keep a long durability for 20 h at 20 mA cm−2. Additionally, the production of hydrogen powered by the electricity derived from solar and wind energy utilizing the CoSx-Ni3S2/NF as the electrocatalysts in laboratory condition was also simulated. This work will provide a novel perspective for HER research from the engineering of electrode-architecture.