Alleviating the competitive adsorption of hydrogen and hydroxyl intermediates on Ru by d–p orbital hybridization for hydrogen electrooxidation

Abstract

Strengthening the hydroxyl binding energy (OHBE) on Ru surfaces for efficient hydrogen oxidation reaction (HOR) in alkaline electrolytes at the expense of narrowing effective potential window (EPW) increases the risk...

Porous Ruthenium–Tungsten–Zinc Nanocages for Efficient Electrocatalytic Hydrogen Oxidation Reaction in Alkali

“…The Cu-UPD analysis showed that the ECSA of Ru 1 W 0.14 Zn 1.47 O x reached 116 m 2 g −1 (Figure 8c). After normalization by ECSA, the specific activity (j 0,s ) of Ru 1 W 0.14 Zn 1.47 O x was found to be 0.026 mA cm ECSA −2 , close to that of the commercial Ru/C catalyst [34]. This suggests that the enhanced HOR activity of Ru 1 W 0.14 Zn 1.47 O x can be attributed to the favorable structure created, which has abundant exposed active sites.…”

Energy‐Efficient Electrosynthesis of High Value‐Added Active Chlorine Coupled with H2 Generation from Direct Seawater Electrolysis through Decoupling Electrolytes

“…[29] Meanwhile, as presented in the Ru 3p and Ti 2p core-level spectrum (Figure S7b), the Ru 3p 3/2 and Ru 3p 1/2 peaks, located respectively at 462.3 and 485.0 eV, could also be attributed to the Ru 0 for metallic Ru. [30,31] The peaks at 464.5 and 458.8 eV with the spin-orbit splitting of 5.7 eV are assigned to typical Ti 2p 1/2 and Ti 2p 3/2 in TiO 2 , respectively. [32] The O 1s spectrum (Figure S7c) includes two characteristic peaks: one peak at 530.1 eV attributed to the lattice oxygen and another broad peak at near 532 eV referred to the oxygen vacancy and surface chemisorbed oxygen.…”

Revealing the role of a bridging oxygen in a carbon shell coated Ni interface for enhanced alkaline hydrogen oxidation reaction

“…In fact, the adsorption behaviors of H* and OH* on the active sites are competitive, and excessive OHBE will result in high coverage of hydroxyl on the catalyst surface, and this will hinder the adsorption of hydrogen during the alkaline HOR process. 76,77 To gain deeper insight into the volcanic relationship of the HOR activity with the introduction of increasing boron (Fig. S29†), calculation models with a slight proportion of the Ni–O–B interface (Ni@B s C) and a large proportion of the Ni–O–B interface (Ni@B r C) were also constructed to investigate the relationship between the alkaline HOR activity and OHBE (Fig.…”