Hierarchical Cu2S hollow nanowire arrays for highly efficient hydrogen evolution reaction. Issue 10 (4th May 2021)

• Record Type: Journal Article
• Authors: Xie, Ning; Ma, Dong-Dong; Wu, Yu-Lin; Wu, Xin-Tao; Zhu, Qi-Long
• Is Part Of: Sustainable energy & fuels. Volume 5:Issue 10(2021)
• Page Start: 2633
• Page End: 2639
• Publication Date: 2021-05-04
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/d1se00453k
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : A self-supported three-dimensional unique hierarchical Cu2 S hollow nanowire array nanostructure with excellent activity for the hydrogen-evolution reaction was synthesized in a facile and economical way. 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 Cu2 S hollow nanowire arrays implanted tightly on copper foam (Cu2 S 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 Cu2 S 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 Cu2 S 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.