Single-atom Ir and Ru anchored on graphitic carbon nitride for efficient and stable electrocatalytic/photocatalytic hydrogen evolution

H2-production and electron-transfer mechanism of a noble-metal-free WO3@ZnIn2S4 S-scheme heterojunction photocatalyst

“…as cocatalysts have been reported for photocatalytic H 2 production since noble metals have a near zero Gibbs free energy change for H 2 evolution. [12][13][14][15] However, the scarcity and high cost of noble metals limit their practical application. [16][17][18] Therefore, developing high-efficiency noble-metal-free photocatalysts for the production of H 2 is still desirable yet challenging.…”

Atomically Thin Holey Two-Dimensional Ru2P Nanosheets for Enhanced Hydrogen Evolution Electrocatalysis

“…Based on the concentration of active sites, the turnover frequency (TOF) values of Ru 2 P-NS450 were calculated to be 19.21 and 15.17 s –1 (overpotential of 100 mV) in 0.5 M H 2 SO 4 and 1 M KOH, respectively, which are much larger than those of Ru 2 P-NP450 (3.46 s –1 in 0.5 M H 2 SO 4 and 2.09 s –1 in 1 M KOH), highlighting the benefit of holey 2D NS in optimizing the HER activity. Also, the calculated TOF values of Ru 2 P-NS450 were found to be superior to those of the most advanced Ru-based HER electrocatalysts, stressing the outstanding HER performance of holey Ru 2 P NS. , We speculate that this behavior arises from the ability of crystal defects to serve as adsorption and reaction sites for guest ions and intermediates . Holey 2D structures also have large surface areas with abundant cross-plane channels that facilitate the rapid transport of electrolyte ions and contribute to the enhancement of HER activity .…”

“…Also, the calculated TOF values of Ru 2 P-NS450 were found to be superior to those of the most advanced Ru-based HER electrocatalysts, stressing the outstanding HER performance of holey Ru 2 P NS. 26,27 We speculate that this behavior arises from the ability of crystal defects to serve as adsorption and reaction sites for guest ions and intermediates. 28 Holey 2D structures also have large surface areas with abundant cross-plane channels that facilitate the rapid transport of electrolyte ions and contribute to the enhancement of HER activity.…”

Bifunctional atomically dispersed ruthenium electrocatalysts for efficient bipolar membrane water electrolysis

“…[19][20][21] Particularly, Ru ADCs with a Ru loading of 0.2-1.0 wt% have shown electrocatalytic performance comparable to that of the commercial benchmark catalysts (e.g., Pt/C for HER and RuO 2 for OER). [19][20][21][22][23][24][25] It has been generally accepted that the RuN x species in Ru ADCs are electrocatalytically active sites and play an important role in improving the catalytic performance. 21,23,26 The nitrogen groups on the catalyst support can not only impart uniform dispersion of Ru species, 7 but also alter the electronic structure of Ru, prompting the electrocatalytic reaction.…”