Electrocatalytic hydrogen evolution of conducting coordination polymers based on 1,1,2,2-ethenetetrathiolate

Electrocatalysis based on metal-organic coordination polymers (CPs) catalyst, especially metal-1,1,2,2-ethenetetrathiolate (ett), has received increasing attention due to their high-electrical conductivity, unique morphology and excellent redox activity. Here, amorphous powder of CPs is synthesized and firmly coated on the surfaces of carbon fiber cloth (CFC), then serves as active electrocatalyst for hydrogen evolution reaction (HER). The operating overpotentials of the poly[K_x(M-ett)] (Co, Ni or Cu) are 0.43, 0.36, 0.45 V, respectively, at a current density of 10 mA cm^-2 with pH = 0, along with the Tafel plot of 144, 153, 329 mV dec^-1. Moreover, they show remarkable electrolysis stability under harsh acid conditions. This study extends the HER application of poly[K_x(M-ett)] coating on CFC surfaces.