In‐Situ Growth of Cu2S‐MoS2 Bimetallic Electrocatalyst on Carbon Cloth for Hydrogen Evolution Reaction

Abstract Hydrogen evolution reaction (HER) is one of prospective methods to produce hydrogen energy, and the key technology of which lies in the preparation of electrocatalysts. Preparations of catalysts with high efficiency, low price and good stability are expected. In this work, a new polyoxometalate‐based copper‐organic framework, [{Cu II (C 10 N 6 H 7 ) 4 (H 2 O) 2 }H 6 (PMo 12 O 40 ) 2 ] ⋅ 12H 2 O ( 1 ) [C 10 N 6 H 7 : 3‐(1H‐pyrazol‐4‐yl)‐5‐(pyridin‐4‐yl)‐1,2,4‐triazole], was synthesized as an electrocatalyst precursor, and confirmed by infrared spectroscopy (IR), single‐crystal X‐ray diffraction (SXRD) and X‐ray powder diffraction (PXRD). A new electrocatalyst (Cu 2 S‐MoS 2 @CC‐1) was synthesized from 1 , thiourea (TU) and carbon cloth (CC) by a one‐pot hydrothermal method. Due to the synergistic effects between Cu 2 S and MoS 2 , the Cu 2 S‐MoS 2 @CC‐1 catalyst exhibits high electrocatalytic HER activity and good stability in 0.5 M H 2 SO 4 . Namely, Cu 2 S‐MoS 2 @CC‐1 shows low overpotential of 150 mV@10 mA cm −2 vs reversible hydrogen electrode (RHE) and small Tafel slope of 61 mV dec −1 , and remains good stability at least 94 h and over 1000 catalytic cycles. This method provides a promising strategy for development of non‐noble metal catalysts.