Abstract
• Using stainless steel fiber felt as the substrate. • Pt is electrodeposited on the substrate. • Pt-316L-0.1 exhibite the excellent HER performance. Self-supported metal fiber felt electrode was synthesized by the electrodeposition method, and the catalytic activities in the hydrogen evolution reaction (HER) were investigated. The results showed that when the stainless steel fiber felt 316L was used as the base material and the Pt loading was about 0.5 mg·cm -2 , the obtained sample Pt-316L-0.1 exhibited the best electrocatalysis hydrogen evolution performance and stability. In 0.5 M H 2 SO 4 , its hydrogen evolution overpotential is 44 mV, and the Tafel slope is 55 mV·dec -1 . It is worth mentioning that Pt-316L-0.1 also has the highest electrochemical double-layer capacitance value (114.06 mF·cm -2 ), indicating that it has a large electrochemical active area and abundant active sites. It indicates that the self-supported electrode is favorable for hydrogen precipitation reaction, which provides a new direction for the design of electrode materials for industrial water electrolysis for hydrogen evolution.
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