A Ni-modified CuS-based self-supported electrocatalyst with nanobead-like porous morphology for efficient hydrogen production in basic media. (4th April 2023)

• Record Type: Journal Article
• Authors: Burungale, Vishal V.; Bae, Hyojung; Mane, Pratik; Cha, An-Na; Ryu, Sang-Wan; Kang, Soon-Hyung; Ha, Jun-Seok
• Is Part Of: New journal of chemistry. Volume 47:Number 16(2023)
• Page Start: 7790
• Page End: 7799
• Publication Date: 2023-04-04
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj06114g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : The enhanced HER catalytic activity of a porous CuS-based catalyst, which was converted from Cu2 O, is due to both increased surface porosity and intrinsic activity resulting from the synergy between Cu and Ni. Abstract : This study aims to improve the hydrogen evolution reaction (HER) catalytic activity of CuS-based electrocatalysts in basic media for efficient and cost-effective hydrogen production. CuS is a promising alternative to noble metal-based electrocatalysts due to its low cost and high stability, but individual CuS has not been established as a good HER electrocatalyst. Recent reports suggest combining Cu and Ni to increase the HER catalytic activity of Cu-based electrocatalysts. This study explores the synergy of Cu and Ni by decorating the surface of CuS with Ni for an effective HER. The results show that sulfurizing electrodeposited Cu2 O with the Ni precursor increases the electrochemical performance, achieving an overpotential of 325 mV to achieve a current density of 100 mA cm −2 . This study provides a promising approach for developing efficient and cost-effective HER electrocatalysts.