Controlled Assembly of Porphyrin-MoS 2 Composite Nanosheets for Enhanced Photoelectrochemical Performance.

As a promising non-precious metal photoelectrochemical (PEC) catalyst, MoS2 exhibits high electrocatalytic activity and stability, while the weak light absorption efficiency and low photoresponse current limit its practical application. Herein, a facile co-assembly approach is proposed to construct porphyrin-MoS2 composite photoelectrocatalysts. The as-prepared photoelectrocatalysts show a significantly enhanced photocurrent response as high as 16 μA cm-2 , which is about 2 times higher than that of bare MoS2 . Furthermore, the obtained porphyrin-MoS2 catalysts exhibit excellent durability when tested for 23000 s, thus providing a useful strategy for the design of highly efficient dye-sensitized PEC catalysts.