Interface modifications for RuO₂-decorated MoS₂nanosheets as excellent electrocatalysts for alkaline hydrogen evolution reactions

Abstract

The development of earth-rich, low-cost, and high-efficiency electrocatalysts toward alkaline hydrogen evolution reaction (HER) in water spitting process is extremely desirable, yet it is still a huge challenge. In this...

Three-dimensional porous metal phosphide cathode electrodes prepared via electroless galvanic modification for alkaline water electrolysis

“…S11,† and from the corresponding calculations, the d-band centers of Ni 2 P–Ru and Ni 2 P are identified at −2.34 eV and −2.02 eV, respectively. Since a lower d-band indicates weaker H adsorption and better dissociation abilities, 53 an easier H 2 desorption over the Ni 2 P–Ru system is clear with the reduced d-band center values obtained. This clearly indicates that hydrogen desorption can easily occur in the presence of Ru in Ni 2 P, supporting the excellent HER in this system.…”

Accelerating Ru0/Ru4+ Adjacent Dual Sites Construction by Copper Switch for Efficient Alkaline Hydrogen Evolution

“…[ 1,3,4 ] Among Ru‐based materials, ruthenium oxide (RuO 2 ) is one of the most extensively utilized for alkaline electrocatalytic water splitting because of its high adsorption capacity for H 2 O and dissociation potential. [ 16–21 ] The surface of bare RuO 2 is found that it can only provide the H 2 O dissociation site, and introducing hydrogen production sites can greatly improve the alkaline HER activity. [ 16,20,22,23 ] For example, MoS 2 is an excellent H 2 generation material, when integrating MoS 2 and RuO 2 , the overpotential at the current density of 10 mA cm −2 (η 10 ) was reduced from 194 to 114 mV [ 22 ] ; similarly, RuO 2 /NiRu heterogeneous interface was constructed to own the aforementioned two sites, and the corresponding η 10 (13 mV) was close to that of commercial Pt/C (11 mV).…”

“…[ 16–21 ] The surface of bare RuO 2 is found that it can only provide the H 2 O dissociation site, and introducing hydrogen production sites can greatly improve the alkaline HER activity. [ 16,20,22,23 ] For example, MoS 2 is an excellent H 2 generation material, when integrating MoS 2 and RuO 2 , the overpotential at the current density of 10 mA cm −2 (η 10 ) was reduced from 194 to 114 mV [ 22 ] ; similarly, RuO 2 /NiRu heterogeneous interface was constructed to own the aforementioned two sites, and the corresponding η 10 (13 mV) was close to that of commercial Pt/C (11 mV). [ 24 ] Preparation of RuO 2 ‐based two sites compounds needs precise processes to achieve close contact between the two reaction sites.…”