CoO/Co/N-C nanoparticles embedded in carbon as mediate for oxygen reduction electrocatalysts

Co/CoO nanoparticles armored by N-doped nanoporous carbon polyhedrons towards glucose oxidation in high-performance non-enzymatic sensors

“…1F can be deconvoluted to three peaks at 531.7, 530.5 and 530.0 eV, which were attributed to cobalt(II) oxides, hydroxyl species and adsorbed water, separately. 17 with a rough surface maintained the dodecahedron-like morphology and size of ZIF-67 through calcination treatment in air (Fig. 2B).…”

“…25 Moreover, the large specific surface area and porous nanostructure of the Co/CoO/N-C sample can facilitate interfacial charge transfer in the electrochemical process, which may originate in the abundant exposed sites from porous ZIF-67. 26 17 On the other hand, the N 1s spectrum depicted three peaks at 401.0, 400.1 and 398.7 eV, corresponding to graphitic-N, pyrrolic-N and pyridinic-N, respectively (Fig. 1D).…”

“…8 Du et al also reported CoO/Co/N-C with good oxygen reduction reactivity (ORR) and found that CoO/Co nanoparticles could enhance the conductivity of the material. 17 To date, reports on electrochemical sensors based on Co/CoO/N-C dodecahedrons from zeolite imidazole frameworks (ZIF-67) towards direct glucose oxidation are few.…”

Construction of three-dimensional cobalt sulfide/multi-heteroatom co-doped porous carbon as an efficient trifunctional electrocatalyst

“…54 It has been reported that cobalt oxide plays a positive role in ORR catalysis. 55,56 Dai et al reported a material consisting of Co 3 O 4 embedded in a carbon matrix, showing an E 1/2 of 0.83 V in 0.1 M KOH, which is attributed to the coupling effect by Co 3 O 4 and graphene. 50 Therefore, the formed intermediate cobalt oxide due to the transition from Co 9 S 8 also contributes to the high ORR catalytic activity.…”

“…54 It has been reported that cobalt oxide plays a positive role in ORR catalysis. 55,56 In addition to the superior activity, the anti-poisoning capability of the catalysts is also one of the most crucial factors for the long-term application of fuel cells because the impurities in air (including CO To the best of our knowledge, the strong resistance of CoS xbased catalysts towards S species has rarely been investigated in previous literature. Thus, the as-synthesized Co 9 S 8 /CoNSC exhibits superior electrocatalytic performance with strong resistance to poison, making it a promising catalyst for practical application in fuel cells.…”