Hierarchical Cu2S hollow nanowire arrays for highly efficient hydrogen evolution reaction?
Sustainable Energy & Fuels Pub Date: 2021-04-19 DOI: 10.1039/D1SE00453K
Abstract
Exploiting highly active and low-cost electrocatalysts based on earth-abundant elements for the hydrogen evolution reaction (HER) is an extremely desirable, but challenging task. Herein, we present a facile and economical two-step synthetic procedure to fabricate hierarchical Cu2S hollow nanowire arrays implanted tightly on copper foam (Cu2S HNAs-CF). Owing to the unique hierarchical hollow nanowire array nanostructure of a large surface area, copious active sites, easy mass/transport ability, and high conductivity, the as-synthesized hierarchical Cu2S HNAs-CF electrode (as a self-supported electrode) shows excellent electrochemical HER activity with a low overpotential of 125 mV @ 100 mA cm?2 in an alkaline electrolyte, and ranks as the top HER electrocatalyst reported. Upon coupling with the ordered macroporous RuO2 (OMS-RuO2), the Cu2S HNAs-CF‖OMS-RuO2/CF pair shows excellent performance for overall water splitting, which is significantly superior to those of most reported electrocatalysts and the commercial system PtC/CF‖RuO2/CF.
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Journal Name：Sustainable Energy & Fuels
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CAS no.: 89640-58-4
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