In:
Dalton Transactions, Royal Society of Chemistry (RSC), Vol. 52, No. 15 ( 2023), p. 4891-4899
Abstract:
Electrocatalyst design is an important approach to prompt the commercialization of water electrolysis technologies. In this work, a ruthenium doped MoS 2 /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 MoS 2 /AB heterostructure and the incorporation of Ru effectively induce a phase transition from 2H to 1T-MoS 2 . The as-prepared Ru-MoS 2 /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 H 2 SO 4 , 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-MoS 2 /AB also demonstrates high stability under long-term discharge and elevated temperature conditions. These results suggest that the as-prepared Ru-MoS 2 /AB can be a promising alternative to Pt/C for water electrolysis, due to its high HER activity, easy synthesis, and good stability.
Type of Medium:
Online Resource
ISSN:
1477-9226
,
1477-9234
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2001339-5
detail.hit.zdb_id:
1472887-4
