Spatial confinement of partially oxidized RuCo alloys in N-doped carbon frameworks for highly efficient oxygen evolution electrocatalysis under acidic conditions

Multifunctional Salt-Assisted Construction of Lignin-Derived Ru–Co Bimetal/Carbon Composites with Rich Nanointerface for Electrocatalytic Water Splitting

“…73-1469). No obvious peaks belonging to metallic Ru species can be found, inferring the formation of RuCo alloy, which is also consistent with the HRTEM results and the previous report …”

“…However, although RuO 2 is supposed to have high OER activity in an alkaline medium, many previously reported OER catalysts has been fully reached or surpass this level. , To improve the electrocatalytic performance of Ru-based catalysts, many efforts have been devoted to combining Ru with other transition metals (M = Fe, Ni, Co, Mo, etc. ), resulting in the Ru-M bimetal alloy or oxides, which can not only improve the stability but also significantly reduce dosage and increase the atomic utilization of Ru. − Similarly, constructing a heterogeneous interface between metal and metal oxides has been recently recognized as an efficient means to achieve the integration of OER and HER and enhance their catalytic activity caused by the interface effect. − In addition, the metal-based catalysts cannot reach its full potential of catalytic activity due to the limited accessible active sites and the lack of continuous mass/charge transfer channel. In this regard, supporting multiple metal active components onto graphic porous carbon can generate more exposed active sites and efficient mass/charge transfer, as well as remit the dissolution of the metallic active sites, which is conducive to the superior catalytic activity and exceptional stability in water splitting. , …”

“…37 No obvious peaks belonging to metallic Ru species can be found, inferring the formation of RuCo alloy, which is also consistent with the HRTEM results and the previous report. 15 The nitrogen adsorption/desorption isotherms were performed to assess the pore structure transformation during the copyrolysis process (see Figure 2b, as well as Figure S3 in the Supporting Information). The BET specific surface area (SSA) and pore volume of Co-LNC-0.75 is 972.7 m 2 g −1 and 0.462 cm 3 g −1 , respectively, which is close to Co-LNC-1 (1055.9 m 2 g −1 and 0.491 cm 3 g −1 ) and significantly larger than LC (90.7 m 2 g −1 and 0.0547 cm 3 g −1 ) and Co-LNC-0.25 (375.9 m 2 g −1 and 0.281 cm 3 g −1 ).…”

Ultra-small RuO2/NHC nanocrystal electrocatalysts with efficient water oxidation activities in acidic media

“…35 The two significant bands near 1335 cm −1 and 1591 cm −1 correspond to the D-band and G-band of porous carbon, which are respectively attributed to the defect carbon and graphite carbon. 36 This further proves the successful loading of RuO 2 . Additionally, the specific value of I D / I G for RuO 2 /NHC 3 (0.84) is consistent with that of NHC 3 (0.84), which illustrates that the carbon defect, graphitization, and electrical conductivity have not decreased in the synthesized RuO 2 /NHC 3 .…”

Ru decorated Co nanoparticles supported by N-doped carbon sheet implements Pt-like hydrogen evolution performance in wide pH range

“…Compared to N-doped-carbon, transition metal embedded N-doped carbon (TM@NC, TM = Fe, Co or Ni) is more ideal supports, because TM in TM@NC not only can change the filling level of Ru d-band, but also can anchor Ru to boost support-metal interaction [26][27][28][29][30], which is conducive to enhance the performance and stability. In addition, the structure of carbon substrate also plays a crucial part in catalytic activity.…”