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Integrated Quasiplane Heteronanostructures of MoSe2/Bi2Se3 Hexagonal Nanosheets: Synergetic Electrocatalytic Water Splitting and Enhanced Supercapacitor Performance
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-11-02 , DOI: 10.1002/adfm.201703864 Jing Yang 1 , Chunde Wang 1 , Huanxin Ju 2 , Yuan Sun 1 , Shiqi Xing 1 , Junfa Zhu 2 , Qing Yang 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-11-02 , DOI: 10.1002/adfm.201703864 Jing Yang 1 , Chunde Wang 1 , Huanxin Ju 2 , Yuan Sun 1 , Shiqi Xing 1 , Junfa Zhu 2 , Qing Yang 1
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MoSe2 as a typical transition metal dichalcogenide holds great potential for energy storage and catalysis but its performance is largely limited by its poor conductivity. Bi2Se3 nanosheets, a kind of topological insulators, possess gapless edges on boundary and show metallic character on surface. According to the principle of complementary, a novel integrated quasiplane structure of MoSe2/Bi2Se3 hybrids is designed with artistic heteronanostructures via a hot injection in colloidal system. Interestingly, the heteronanostructures are typically constituted by single‐layer Bi2Se3 hexagonal nanoplates evenly enclosed by small ultrathin hierarchical MoSe2 nanosheets on the whole surfaces. X‐ray photoelectron spectroscopy investigations suggest obvious electron transfer from Bi2Se3 to MoSe2, which can help to enhance the conductivity of the hybrid electrode. Especially, schematic energy band diagrams derived from ultraviolet photoelectron spectroscopy studies indicate that Bi2Se3 has higher EF and smaller Φ than MoSe2, further confirming the electronic modulation between Bi2Se3 and MoSe2, where Bi2Se3 serves as an excellent substrate to provide electrons and acts as channels for high‐rate transition. The MoSe2/Bi2Se3 hybrids demonstrating a low onset potential, small Tafel slope, high current density, and long‐term stability suggest excellent hydrogen evolution reaction activity, whereas a high specific capacitance, satisfactory rate capability, and rapid ions diffusion indicate enhanced supercapacitor performance.
中文翻译：
MoSe2 / Bi2Se3六边形纳米片的集成拟平面异质纳米结构：协同电催化水分解和增强的超级电容器性能
MoSe 2作为典型的过渡金属二卤化碳在能量存储和催化方面具有巨大潜力，但其性能在很大程度上受到导电性差的限制。Bi 2 Se 3纳米片是一种拓扑绝缘体，在边界上具有无间隙的边缘，并在表面显示出金属特性。根据互补原理，通过胶体体系中的热注入，设计了具有艺术异质结构的新型MoSe 2 / Bi 2 Se 3杂化集成准平面结构。有趣的是，异质结构通常由单层Bi 2 Se 3构成六边形纳米板均匀地包围在整个表面上的小的超薄分级MoSe 2纳米片中。X射线光电子能谱研究表明，有明显的电子从Bi 2 Se 3转移到MoSe 2，这有助于增强混合电极的电导率。尤其是，从紫外光电子能谱研究得出的能带示意图表明，Bi 2 Se 3比MoSe 2具有更高的E F和更小的Φ ，进一步证实了Bi 2 Se 3和MoSe 2之间的电子调制，其中Bi 2Se 3是提供电子的优良基质，并充当高速率跃迁的通道。MoSe 2 / Bi 2 Se 3杂化物表现出低的起始电位，小的Tafel斜率，高的电流密度和长期的稳定性，表明其极好的氢析出反应活性，而高的比电容，令人满意的倍率能力和快速的离子扩散表明增强的超级电容器性能。
更新日期：2017-11-02
中文翻译：
MoSe2 / Bi2Se3六边形纳米片的集成拟平面异质纳米结构：协同电催化水分解和增强的超级电容器性能
MoSe 2作为典型的过渡金属二卤化碳在能量存储和催化方面具有巨大潜力，但其性能在很大程度上受到导电性差的限制。Bi 2 Se 3纳米片是一种拓扑绝缘体，在边界上具有无间隙的边缘，并在表面显示出金属特性。根据互补原理，通过胶体体系中的热注入，设计了具有艺术异质结构的新型MoSe 2 / Bi 2 Se 3杂化集成准平面结构。有趣的是，异质结构通常由单层Bi 2 Se 3构成六边形纳米板均匀地包围在整个表面上的小的超薄分级MoSe 2纳米片中。X射线光电子能谱研究表明，有明显的电子从Bi 2 Se 3转移到MoSe 2，这有助于增强混合电极的电导率。尤其是，从紫外光电子能谱研究得出的能带示意图表明，Bi 2 Se 3比MoSe 2具有更高的E F和更小的Φ ，进一步证实了Bi 2 Se 3和MoSe 2之间的电子调制，其中Bi 2Se 3是提供电子的优良基质，并充当高速率跃迁的通道。MoSe 2 / Bi 2 Se 3杂化物表现出低的起始电位，小的Tafel斜率，高的电流密度和长期的稳定性，表明其极好的氢析出反应活性，而高的比电容，令人满意的倍率能力和快速的离子扩散表明增强的超级电容器性能。
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