Ruthenium doping in the MoS2/AB heterostructure for the hydrogen evolution reaction in acidic media. Issue 15 (21st March 2023)

• Record Type: Journal Article
• Authors: Ren, Haowen; Chen, Shihong; Chen, Chong; Qiu, Yang; Luo, Chunhui; Zhao, Qiang; Yang, Wei
• Is Part Of: Dalton transactions. Volume 52:Issue 15(2023)
• Page Start: 4891
• Page End: 4899
• Publication Date: 2023-03-21
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d3dt00309d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A ruthenium doped MoS2 /AB heterostructure is synthesized as a highly efficient and durable electrocatalyst, in which the Ru near S is demonstrated as optimum active sites for hydrogen evolution reaction in water electrolysis. Abstract : Electrocatalyst design is an important approach to prompt the commercialization of water electrolysis technologies. In this work, a ruthenium doped MoS2 /AB heterostructure is synthesized as an electrocatalyst for the hydrogen evolution reaction (HER) through hydrothermal and annealing processes. The physical–chemical characterization studies show that the MoS2 /AB heterostructure and the incorporation of Ru effectively induce a phase transition from 2H to 1T-MoS2 . The as-prepared Ru-MoS2 /AB exhibits an excellent HER performance with a very low overpotential of 13 mV at 10 mA cm −2 and a Tafel slope of 31 mV dec −1 in 0.5 M H2 SO4, remarkably higher than those of Pt/C (overpotential of 28 mV at 10 mA cm −2, 41 mV dec −1 ). Density functional theory calculations suggest that the H absorption on Ru bonding to S exhibits a rather low binding energy (−0.22 eV), indicating the optimum active sites of Ru near S for HER. Significantly, the Ru-MoS2 /AB also demonstrates high stability under long-term discharge and elevated temperature conditions. These results suggest that the as-prepared Ru-MoS2 /AB can be a promising alternative to Pt/C for water electrolysis, due to its high HER activity, easy synthesis, and good stability.