Co/CoP embedded in a hairy nitrogen-doped carbon polyhedron as an advanced tri-functional electrocatalyst

Abstract

The hairy Co/CoP–HNC derived from common MOFs exhibits excellent tri-functional catalytic activity for ORR, OER, and HER in an alkaline solution.

Hierarchically Porous Multimetal‐Based Carbon Nanorod Hybrid as an Efficient Oxygen Catalyst for Rechargeable Zinc–Air Batteries

“…The slightly lower performance of FeNi@C/Co@NC‐P indicates that the introduction of secondary MOFs (ZIFs) with physical blended method dilute the active sites from FeNi@C‐P, which further confirms that intimate contact between two MOFs is beneficial to enhancing the multimetal synergetic effect. In addition, the poor performance of Co@NC‐P is attributed that no CoP is formed and a major part of Co maintains its metallic state which cannot boost the OER activity . The Tafel slope of FeNiCo@NC‐P (64 mV dec −1 ), FeNi@C‐P (62 mV dec −1 ), and FeNi@C/Co@NC‐P (62 mV dec −1 ) exhibit smaller value than Co‐P@NC (76 mV dec −1 ) and commercial Ir/C (88 mV dec −1 ), which confirms multimetal‐based carbon materials possess fast OER kinetics (Figure b).…”

“…Compared with no XPS signal of P at FeNiCo@NC, two peaks of P 2p XPS spectra of FeNiCo@NC‐P (Figure c) located at 129.5 and 130.4 eV correspond to P 2p 3/2 and P 2p 1/2 , which are assigned to metal‐P, suggesting a successful phosphidation process. The peak at 133.6 eV represents PO species, indicating an inevitable oxidation of the surface of metal phosphides . The Co 2p 3/2 spectrum of FeNiCo@NC reveals four fitted peaks (Figure d) at 778.2, 780.0, 782.5, and 785.6 eV which can be assigned to the metallic Co, oxidized Co species, auger peak of Fe, and satellite peak of Co .…”

Exploring Fe‐Nx for Peroxide Reduction: Template‐Free Synthesis of Fe‐Nx Traumatized Mesoporous Carbon Nanotubes as an ORR Catalyst in Acidic and Alkaline Solutions

“…The fabrication of nanostructures through the pyrolysis of metal organic frameworks (MOFs), paralleled with other synthetic procedures, with porous interrupted crystal‐like nanostructures, not only gives accurate size, morphological structures but also facilitate the incorporation of various functional materials in single step . Recently, a catalyst architecture is synthesized by the pyrolysis of MOF using dicyanamide as external template . We projected that cyano group in dicyanoimidazole, being a chemical ancestor for g‐C 3 N 4 can be an ideal source of N‐doped graphitic matrix, enriched with Fe‐N x centres.…”

“…[9] Recently,acatalyst architecture is synthesized by the pyrolysis of MOF using dicyanamide as external template. [10] We projected that cyano group in dicyanoimidazole, being a chemicala ncestor for g-C 3 N 4 can be an ideal source of Ndopedg raphitic matrix, enriched with Fe-N x centres. Coupling of these Fe-N x moieties with Fe 3 Cc ores, walled with N-doped carbon nanotubes is anticipated to deliver superior ORR performance.…”

Recent Advances in Non‐Precious Metal‐Based Electrodes for Alkaline Water Electrolysis

“…In addition to this, Sun et al. also fabricated Co/CoP with hairy N‐doped carbon hollow polyhedron, which exhibited high activity and stability for HER, OER and ORR processes, and Zn‐air battery as a tri‐functional electrocatayst …”