Highly efficient electrocatalytic hydrogen evolution over edge-modified phosphorene quantum dot/prussian blue skeleton structure
Highly efficient electrocatalytic hydrogen evolution over edge-modified phosphorene quantum dot/prussian blue skeleton structure
复制标题
边缘修饰磷烯量子点/普鲁士蓝骨架结构的高效电催化析氢
DOI：
10.1016/j.jcat.2019.05.011
复制
发表时间：
2019-06
影响因子：
7.3
通讯作者：
Tongyu Yang
中科院分区：
文献类型：
--
作者：
Xiaohong Xia;Lang Liu;Xiaohui Li;Shasha Gao;Tongyu Yang
采用液相反萃取辅助液相沉淀法制备了磷烯量子点修饰普鲁士蓝多孔骨架结构。在这种结构中，普鲁士蓝中的CN-基团具有比磷原子更大的化学电负性，这不仅可以钝化磷烯纳米结构的边缘，而且还可以在电催化分解水制氢中需要黑磷的价带最大和最小带边位置。conduction.band此外，普鲁士蓝多孔网络还可以作为磷烯、量子点的载体和电子传输介质。这种普鲁士蓝负载的磷quantum.dot多孔网络表现出增强的电催化析氢性能，在10 mA cm 2下的过电位为148 mV，塔菲尔斜率为79 mV dec 1。大大超过了黑磷的含量。此外，循环伏安法和恒电位测试均表明该复合物具有良好的电催化稳定性。这种基于边缘修饰的磷烯纳米结构的结构表现出高效的水裂解电催化活性。
Facile liquid precipitation method assisted by liquid phase stripping has been used to prepare phosphorene quantum dot modified prussian blue porous skeleton structure. In this structure, the CN– group in.prussian blue has larger chemical electronegativity than phosphorus atom, which can not only passivate.the edges of phosphorene nanostructure, but also desire the valence band maximum and conduction.band minimum band edge positions of black phosphorus for hydrogen generation in electrocatalytic.water splitting. Moreover, the prussian blue porous network can be used as the support for phosphorene.quantum dot and the medium for electron transport. This prussian blue supported phosphorene quantum.dot porous network exhibits enhanced electrocatalytic hydrogen evolution performance with an overpotential of 148 mV at 10 mA cm2 and a Tafel slope of 79 mV dec1., which drastically surpass those.of the black phosphorus. In addition, both the consecutive cyclic voltammetry and potentiostatic test.reveal the outstanding electrocatalytic stability of the composite. This construction based on edgemodified phosphorene nanostructure presents efficient electrocatalys activity for water splitting.
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