Mn-doped Ru/RuO2 nanoclusters@CNT with strong metal-support interaction for efficient water splitting in acidic media

Metallic Nanoclusters for Electrochemical Water Splitting

“…[49] Xu et al proposed that the combination of Mndoped Ru/RuO 2 NCs and acidized multiwall CNTs (Mn-Ru/ RuO 2 @CNTs), can not only improve electron transfer capacity and catalytic efficiency of the catalysts but also avoid the aggregation and dissolution of the active site simultaneously, achieving enhanced stability and activity under acidic media with large current density in water splitting. [50] N-doped carbon matrix can act as coordination sites to form metal-N bonds and subsequently anchor metal atoms, which enables uniform dispersion of NCs and prevents their aggregation. [51] Cheng et al designed highly dispersed and ultra-fine Ru-NCs on Ndoped carbon by direct pyrolysis of tris(2,2'-bipyridyl)-ruthenium (II) chloride hexahydrate (TBA, Figure 4b).…”

Recent advances in iridium-based catalysts with different dimensions for the acidic oxygen evolution reaction

“…41,119 In general, diverse components with variable electronegativities, such as multimetallic components, supports, and ligands, can generate electronic effects. 35,120,121 Among them, the preparation of multimetallic Ir-based nanocatalysts is an effective strategy to tune the local electronic structure of active centers (including orbitals, charge density, and degrees of freedom of active sites) through charge redistribution. 28,122 For example, ultrasmall IrW nanoparticles dispersed on carbon nanotubes (IrW/CNT) were prepared by introducing tungsten (W) atoms with flexible valence states into metallic Ir, and Ir atoms donated electrons on d orbitals to W atoms due to the different electronegativity.…”

Interfacial electron modulation for Ru particles on Cu aerogel as an efficient electrocatalyst for hydrogen evolution reaction

“…From this point of view, designing the aerogel skeleton with non-noble metals to support Ru-based materials can give the advantages of better heterogeneous interfaces and three-dimensional structures, which may contribute to the improved HER performance for water electrolysis. [29][30][31][32] Encouraged by the interface effect for heterogeneous electrocatalysts, herein, the Ru-Cu aerogel (named as Ru-Cu aero) was easily prepared by the spontaneous gelation method, in which the interaction between Ru nanoparticles (NPs) and the Cu aerogel (labelled as Cu aero) support improved the electrocatalytic property of HER. In addition, the advantages of the three-dimensional structure for the Ru-Cu aerogel to accelerate the ad/desorption of hydrogen and the electron transfer, the large surface area of the Cu aerogel and the good dispersion of the Ru NPs also allowed for the formation of more interfacial active sites.…”

“…From this point of view, designing the aerogel skeleton with non-noble metals to support Ru-based materials can give the advantages of better heterogeneous interfaces and three-dimensional structures, which may contribute to the improved HER performance for water electrolysis. 29–32…”