Enhanced Electrocatalytic Activity of Cobalt-Doped Ceria Embedded on Nitrogen, Sulfur-Doped Reduced Graphene Oxide as an Electrocatalyst for Oxygen Reduction Reaction

Abstract

N, S-doped rGO was successfully synthesized and embedded Co-doped CeO2 via hydrothermal synthesis. The crystal structure, surface morphology and elemental composition of the prepared catalyst were studied by XRD, Raman spectra, SEM, TEM and XPS analyses. The synthesized electrocatalyst exhibits high onset and halfwave potential during the ORR. This result shows that a combination of N- and S-doped rGO and Co-doped CeO2 leads to a synergistic effect in catalyzing the ORR in alkaline media. Co–CeO2/N, S–rGO displays enhanced ORR performance compared to bare CeO2. The superior stability of the prepared catalyst implies its potential applications beyond fuel cells and metal–air batteries.

CeO2decorated on Co-ZIF-L-derived nickel–cobalt sulfide hollow nanosheet arrays for high-performance supercapacitors

“…3f) shows three peaks at 529.1, 530.8, and 531.9 eV, corresponding to the Ce–O bond (Ce 4+ –O), hydroxyl group and oxygen vacancy (Ce 3+ –O), respectively. 23,35…”

“…3f ) shows three peaks at 529.1, 530.8, and 531.9 eV, corresponding to the Ce-O bond (Ce 4+ -O), hydroxyl group and oxygen vacancy (Ce 3+ -O), respectively. 23,35 The surface structure and morphology of NiCoS/CeO 2 were further characterized by transmission electron microscopy (TEM). As shown in Fig.…”

Enhanced efficiency of photocatalytically synthesised Co3+/Co2+-incorporated CeO2/SnO2 nanocomposite and supercapacitor studies

“…The band is at 464 cm −1 and is associated with the transverse F 2g vibration mode. [33][34][35] Tetragonal rutile-structured nano-SnO 2 belongs to the P4 2 /mm space group with D 4h and exhibits peaks at 478, 633, and 771 cm −1 , which are associated with the transverse A 1g , B 1g , B 2g , and E g vibration modes. The peaks at 478 and 634 cm −1 are dened as translational (E g ) and symmetric (A 1g ) modes, respectively; the peak at 771 cm −1 is classed as the asymmetric (B 2g ) mode.…”

Catalysts in Energy Applications

“…One such important article, entitled "Enhanced Electrocatalytic Activity of Cobalt-Doped Ceria Embedded on Nitrogen, Sulfur-Doped Reduced Graphene Oxide as an Electrocatalyst for Oxygen Reduction Reaction" by Sridharan et al [70], introduces a synergistic electrocatalyst for the oxygen reduction reaction (ORR). The combination of N-and S-doped reduced graphene oxide (rGO) with Co-doped CeO 2 demonstrated superior ORR performance in alkaline media.…”