Electronic coupling induced high performance of N, S-codoped graphene supported CoS2 nanoparticles for catalytic reduction and evolution of oxygen

Chen, Bohong; Jiang, Zhongqing; Zhou, Lingshan; Deng, Binglu; Jiang, Zengjie; Huang, Jianlin; Liu, Meilin

doi:10.1016/j.jpowsour.2018.04.010

Cited by 48 publications

(17 citation statements)

References 41 publications

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“…In addition, the peaks at 168.4 and 169.4 eV of S respectively indicate the S 2p 3/2 [46] and the S-C bonding (Fig. 4e), which give solid evidence of successful S doping into carbon nanotubes to form S, N-CNTs/ CoS 2 @Co [47]. Electrolysis of water is composed of two half reactions, namely, HER occurring at the cathode and OER occurring at the anode.…”

Section: Resultsmentioning

confidence: 95%

S, N co-doped carbon nanotube-encapsulated core-shelled CoS2@Co nanoparticles: efficient and stable bifunctional catalysts for overall water splitting

et al. 2018

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Section: Resultsmentioning

confidence: 95%

S, N co-doped carbon nanotube-encapsulated core-shelled CoS2@Co nanoparticles: efficient and stable bifunctional catalysts for overall water splitting

et al. 2018

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“…[6,18] The deconvoluted S 2p spectra (Figure 3c) show two prominent peaks corresponding to S 2p 3/2 and S 2p 1/2 , respectively, and three minor peaks. [19] Considering the binding energies of Co 2p spectra, the OÀ CoS 2 exhibited more severe ion polarization, namely higher binding energies for Co 2p peaks and lower binding energies for S 2p peaks compared to pure CoS 2 , due to the shortened CoÀ S bond. The peaks with a binding energy of 161.78 eV (pure CoS 2 ) and 161.65 eV (OÀ CoS 2 ) were assigned to S 2 À 2 that had not entered the CoS 2 lattice and bonded with Co 2 + or CoS 2 surface.…”

Section: Proposed Growth Processmentioning

confidence: 94%

Synthesis of Lattice‐Contracted Cobalt Disulfide as an Outstanding Oxygen Reduction Reaction Catalyst via Self‐assembly Arrangement

Zhang

Wang

et al. 2021

ChemSusChem

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Identifying high‐performance non‐precious metal‐based catalysts at the cathode is a major challenge for future practical applications. Herein, a soft‐template route through a self‐assembly arrangement of sulfur sources was successfully developed, facilitating the anion exchange. In addition, compared with pristine cobalt disulfide synthesized without templates, the cobalt disulfide prepared using the new method presented a lattice shrinking phenomenon due to the hindrance of cobalt hydroxide crystal cell. Based on X‐ray absorption spectroscopy (XAS) and density functional theory (DFT) calculation, increased occupancy of eg orbitals was verified for the cobalt disulfide after shrinkage, which was the main factor for enhancing the intrinsic activity of the catalyst. Besides the microscopic morphologic structure, elementary composition, and the valence state of the elements, the possible growth process of the cobalt disulfide was also discussed in detail. As catalyst for the oxygen reduction reaction, CoS2 showed a similar half‐wave potential (0.81 vs. 0.84 V for Pt/C) and higher diffusion‐limiting current density (reaching 5.33 vs. 5.19 mA cm−2 for Pt/C) than a commercial Pt/C catalyst. Hence, our results provide a rational design direction for this type of catalysts.

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“…[19][20][21] However, the moderate ORR activity, susceptibility to oxidation, and activity decay in alkaline electrolytes severely limit its practical application in long-life rechargeable ZABs. [22,23] Novel and sophisticated strategies are therefore needed to improve its OER and ORR catalytic performance to meet the requirements of high efficiency and long life in practical applications.…”

Section: Doi: 101002/advs202001178mentioning

confidence: 99%

Nitrogen‐Doped Cobalt Pyrite Yolk–Shell Hollow Spheres for Long‐Life Rechargeable Zn–Air Batteries

et al. 2020

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Limited by the sluggish four-electron transfer process, designing high-performance nonprecious electrocatalysts for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is urgently desired for efficient rechargeable Zn-air batteries (ZABs). Herein, the successful synthesis of porous nitrogen-doped cobalt pyrite yolk-shell nanospheres (N-CoS 2 YSSs) is reported. Benefiting from the abundant porosity of the porous yolk-shell structure and unique electronic properties by nitrogen doping, the as-prepared N-CoS 2 YSSs possess more exposed active surface, thus giving rise to superior activity for reversible oxygen electrocatalysis and outstanding cycling stability (more than 165 h at 10 mA cm −2) in ZABs, exceeding the commercial Pt/C and RuO 2 hybrid catalysts. Moreover, the assembled ZABs, delivering a specific capacity of 640 mAh g Zn −1 , can be used for practical devices. This work provides a novel tactic to engineer sulfides as high efficiency and promising bifunctional oxygen electrocatalysts for advanced metal-air batteries. Oxygen electrocatalysis has received widespread attention due to its importance in fuel cells, water splitting, and metal-air batteries. [1-4] Among these sustainable energy storage and conversion technologies, Zn-air batteries (ZABs) have been recognized as a promising global portfolio storage technology due to their unique half-open systems, significant theoretical energy density (1086 Wh kg −1 , including oxygen), much flatter operating voltage (1.66 V), environmental benignity, and good safety. [3,5] However, the sluggish kinetics of oxygen evolution reaction (OER) for charging and oxygen reduction reaction (ORR)

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Electronic coupling induced high performance of N, S-codoped graphene supported CoS2 nanoparticles for catalytic reduction and evolution of oxygen

Cited by 48 publications

References 41 publications

S, N co-doped carbon nanotube-encapsulated core-shelled CoS2@Co nanoparticles: efficient and stable bifunctional catalysts for overall water splitting

S, N co-doped carbon nanotube-encapsulated core-shelled CoS2@Co nanoparticles: efficient and stable bifunctional catalysts for overall water splitting

Synthesis of Lattice‐Contracted Cobalt Disulfide as an Outstanding Oxygen Reduction Reaction Catalyst via Self‐assembly Arrangement

Nitrogen‐Doped Cobalt Pyrite Yolk–Shell Hollow Spheres for Long‐Life Rechargeable Zn–Air Batteries

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