Pore surface engineering of CTFs@MoS2: Hierarchical pores and aggregation architecture dependent electrocatalysis for hydrogen evolution reaction.

Electrochemical water splitting is an important strategy to generate hydrogen in mass production. Development of synthesizable catalysts has always been one of the biggest obstacle to replace Platinum group catalysts. This work, a high quality crystal polymer CTFs (BET surface area is 1562.6 m 2 g -1 ) is synthesized and in-situ grown MoS 2 nano-particles into/onto the 1D channel arrays or the external surface for electrocatalysis (HER). The state-of-the-art structure CTFs@MoS 2 -5 exhibits superior catalytic kinetics with a surpassing overpotential of 93 mV, Tafel slope of 43 mV dec -1 than that of most other reported analogous catalyst. The inherent π-conjugated crystal channels in CTFs provides a multifunctional supports for electron transmission and mass diffusion during the hydrogen evolution process. Catalytic kinetics analysis shows that the HER performance have intense relationships with the hierarchical pore parameters and aggregated thickness of MoS 2 nano-particles. This work provides an attractive and durable alternative to high activity and good stability synthesizable catalysts for HER.