原位生长在聚喹唑啉基共轭微孔聚合物表面的MoS_(2)及其析氢性能

In-situ Growth of MoS_(2) on the Surface of Polyquinazoline Conjugated Microporous Polymers and Its Electrocatalysis Hydrogen Performance

合成一种三环喹唑啉的共轭微孔聚合物(TQ-CMPs)并用水热法使二硫化钼原位生长在其骨架表面,制备出一种新型复合电催化析氢催化剂并研究了它的电催化析氢活性。结果表明,TQ-CMPs与MoS_(2)的质量比为2∶1的催化剂具有优异的电催化析氢活性,其过电势为71 mV,Tafel斜率为52 mV·dec^(-1)。比表面积较大的TQ-CMPs,使MoS_(2)的分散度提高、避免了MoS_(2)的堆积和聚集并使更多的MoS_(2)边缘暴露,从而提高了催化剂的效率。TQ-CMPs丰富的孔道结构和延伸的π共轭骨架,有利于质量运输和电荷转移。

Tripolyquinazoline-based conjugated microporous polymers (TQ-CMPs) were synthesized,and molybdenum sulfide (MoS_(2)) nanoparticles grown in-situ on the surface of TQ-CMPs via hydrothermal method as a new type of composite electrocatalyst for hydrogen evolution reaction.Its electrocatalytic hydrogen evolution activity was studied.As a result,when the mass ratio of the TQ-CMPs and MoS_(2)is 2∶1 the electrocatalyst has excellent electrocatalytic activity for an overpotential of 71 mV and a Tafel slope of 52 mV·dec^(-1) for hydrogen evolution reaction.TQ-CMPs have large specific surface areas,which improve the dispersion of MoS_(2).The accumulation of MoS_(2)was avoided effectively,and more MoS_(2)edges was exposed,which improved the electrocatalytic activity.In addition,the abundant porous structure and extendedπ-conjugated framework of TQ-CMPs facilitated mass transport and charge transfer.