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MoS2 quantum dots decorated ultrathin NiO nanosheets for overall water splitting.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-29 , DOI: 10.1016/j.jcis.2020.01.109
Gang Zhan 1 , Jianfang Zhang 2 , Yan Wang 1 , Cuiping Yu 1 , Jingjie Wu 3 , Jiewu Cui 1 , Xia Shu 1 , Yongqiang Qin 1 , Hongmei Zheng 1 , Jian Sun 1 , Jian Yan 1 , Yong Zhang 1 , Chandra Sekhar Tiwary 4 , Yucheng Wu 5
Affiliation  

Atomically thin 2D materials with high surface areas allow engineering its physical and chemical properties with help of combining or decorating with different classes of materials. The hybrid or heterostructure of two different atomically thin materials exhibits completely different chemical and electronics behavior as compared to its parent components. Here, MoS2 quantum dots (QDs) are decorated onto ultrathin NiO nanosheets (NSs) by using a one-pot hydrothermal process. Uniformly dispersed MoS2 QDs and ultrathin NiO NSs hybrid/heterostructure can provide more active reaction sites and accelerate the charge transfer rate. Benefiting from the heterointerfaces synergistic effect between MoS2 QDs and NiO NSs, the MoS2 QDs/NiO NSs electrode exhibits excellent electrocatalytic activity towards both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As a bifunctional electrocatalyst, the MoS2 QDs/NiO NSs electrode has achieved highly efficient overall water splitting activity, which needs a low voltage of 1.61 V to deliver a 10 mA cm-2 with superior stability.

中文翻译:

MoS2量子点装饰了超薄的NiO纳米片,用于整体水分解。

具有高表面积的原子薄2D材料允许通过与不同类型的材料组合或装饰来对其物理和化学特性进行工程设计。与它的母体成分相比,两种不同原子薄材料的杂化或异质结构表现出完全不同的化学和电子行为。在这里,通过使用一锅水热法将MoS2量子点(QDs)装饰到超薄NiO纳米片(NSs)上。均匀分散的MoS2 QD和超薄NiO NSs杂/杂结构可以提供更多的活性反应位点并加快电荷转移速率。受益于MoS2 QD和NiO NS之间的异质界面协同效应,MoS2 QDs / NiO NSs电极对氢气析出反应(HER)和氧气析出反应(OER)均具有出色的电催化活性。作为双功能电催化剂,MoS2 QDs / NiO NSs电极实现了高效的整体水分解活性,需要1.61 V的低电压才能提供10 mA cm-2的稳定性。
更新日期:2020-01-30
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