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Enhanced electrocatalysis for alkaline hydrogen evolution by Mn doping in a Ni₃S₂ nanosheet array
- Du, Huitong, Kong, Rongmei, Qu, Fengli, Lu, Limin
- Chemical communications 2018 v.54 no.72 pp. 10100-10103
- catalysts, chemical reactions, durability, electrochemistry, foams, hydrogen production, manganese, nanosheets, nickel, potassium hydroxide
- Developing earth-abundant and efficient catalysts for the hydrogen evolution reaction (HER) is highly desirable. In this communication, we report the development of a Mn-doped Ni₃S₂ nanosheet array on Ni foam (Mn-Ni₃S₂/NF) as a superior and durable catalyst for alkaline hydrogen evolution. Such Mn-Ni₃S₂/NF demands an overpotential of 152 mV to afford 10 mA cm⁻² in 1.0 M KOH, 46 mV less than that for Ni₃S₂/NF. Furthermore, this catalyst also shows high long-term electrochemical durability. This work provides important guidance for exploring optimal HER catalysts.