Revealing and magnifying interfacial effects between ruthenium and carbon supports for efficient hydrogen evolution

Abstract

Ru has been considered as a highly efficient material for hydrogen evolution reaction (HER) and becomes one of the promising alternatives to Pt owing to its relatively low price and...

Efficient Glucose Hydrogenation to Sorbitol by Graphene-like Carbon-Encapsulated Ru Catalyst Synthesized by Evaporation-Induced Self-Assembly and Chemical Activation

“…The characteristic is conducive for catalytic reactions, and a large number of active sites are provided by defect edges . In addition, the vibrational bands at 450–600 cm –1 for the Ru/GLC catalysts are shown in Figure c, whereas there is no significant vibrational band for the GLC material without the addition of Ru, which can be attributed to Ru–C or Ru–N stretching, confirming the tight interaction between Ru and the support. , XRD patterns of all samples are shown in Figure a, which show obvious characteristic peaks of Ru with good crystallinity, corresponding to the diffraction peaks of Ru (JCPDS 65-7645). The XRD patterns at 38.5, 42.2 and 44.2° correspond to (100) (002) (101) crystal planes of hexagonal Ru phase, respectively .…”

“…47 In addition, the vibrational bands at 450−600 cm −1 for the Ru/GLC catalysts are shown in Figure 2c, whereas there is no significant vibrational band for the GLC material without the addition of Ru, which can be attributed to Ru−C or Ru−N stretching, confirming the tight interaction between Ru and the support. 48,49 XRD patterns of all samples are shown in Figure 3a, which show obvious characteristic peaks of Ru with good crystallinity, corresponding to the diffraction peaks 50 It is consistent with the lattice spacing displayed by high-resolution TEM (Figure 1d). In addition, there is a broad peak centered at 22°attributing to the diffraction of the (002) plane of low graphite carbon materials, which widely exists in disordered and porous graphene-like materials.…”

Manipulating the Spatial Position of Ru Confined in the Co Crystal Lattice Encapsulated in the Metal–Organic Framework Matrix To Boost Hydrogen Evolution Reaction

“…96.8% under 1 M KOH (Figure e). Moreover, the contribution to the intrinsic activity of metal NPs and pyridine N was determined using potassium thiocyanide (KSCN) and H 3 PO 4 as poisoning agents (Figure S21, Supporting Information), respectively. − The overpotential of ZIF-67@ZIF-8@Ru-900 increased after treatment with KSCN and H 3 PO 4 , indicating that both Co/Ru NPs and pyridine N are electrocatalytically active sites. The electrocatalytic stability of ZIF-67@ZIF-8@Ru-900 was evaluated by the long-term chronoamperometry measurement (Figure f), and it can be seen that the current density was hardly attenuated after continuously operating for at least 90 h. Besides, the LSV curves before and after 2000 CV cycles almost overlapped (inset of Figure f), further demonstrating the excellent electrochemical stability of ZIF-67@ZIF-8@Ru-900.…”

Fullerene-metalloporphyrin co-crystal as efficient oxygen reduction reaction electrocatalyst precursor for Zn-air batteries

“…In addition, CoTPP/C 60 -800 showed the lowest Tafel slope of 50.6 mV•dec −1 compared with that of Pt/C (79.4 mV•dec −1 ) and the other three samples, indicating the fast ORR catalytic process of CoTPP/C 60 -800 (Fig. 4g) 58,59 .…”