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

Zhang, Jiakun; Cui, Bolan; Shang, Jiang; Liu, Haitao; Dou, Meiling

doi:10.1039/d2nr01704k

Cited by 18 publications

(10 citation statements)

References 68 publications

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“…To obtain the specific surface area and pore size distribution of NiO/CNT and CNT catalysts, a nitrogen absorption and desorption measurement was carried out. As depicted in Figure 3 e, nitrogen adsorption–desorption isotherms of CNT and NiO/CNT catalysts showed obvious hysteresis loops, confirming the existence of distinct mesopores [ 41 , 42 ]. These isotherms should be classified as type IV isotherms.…”

Section: Resultsmentioning

confidence: 86%

Anchoring NiO Nanosheet on the Surface of CNT to Enhance the Performance of a Li-O2 Battery

et al. 2022

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Li2O2, as the cathodic discharge product of aprotic Li-O2 batteries, is difficult to electrochemically decompose. Transition-metal oxides (TMOs) have been proven to play a critical role in promoting the formation and decomposition of Li2O2. Herein, a NiO/CNT catalyst was prepared by anchoring a NiO nanosheet on the surface of CNT. When using the NiO/CNT as a cathode catalyst, the Li-O2 battery had a lower overpotential of 1.2 V and could operate 81 cycles with a limited specific capacity of 1000 mA h g−1 at a current density of 100 mA g−1. In comparison, with CNT as a cathodic catalyst, the battery could achieve an overpotential of 1.64 V and a cycling stability of 66 cycles. The introduction of NiO effectively accelerated the generation and decomposition rate of Li2O2, further improving the battery performance. SEM and XRD characterizations confirmed that a Li2O2 film formed during the discharge process and could be fully electrochemical decomposed in the charge process. The internal network and nanoporous structure of the NiO/CNT catalyst could provide more oxygen diffusion channels and accelerate the decomposition rate of Li2O2. These merits led to the Li-O2 battery’s better performance.

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Section: Resultsmentioning

confidence: 86%

Anchoring NiO Nanosheet on the Surface of CNT to Enhance the Performance of a Li-O2 Battery

et al. 2022

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“…The CV curves of (C 59 N) 2 /MWCNTs, MWCNTs, and(C 59 N) 2 are shown in Figure S13. As is well known, the C dl value is positively correlated with ECSA, which reflects the effective active sites for the adsorption/desorption of intermediates during the OER process . As found in Figure c, (C 59 N) 2 /MWCNTs shows the values of 0.84 mF cm –2 , 21 cm 2 , and 300 for C dl , ECSA, and RF, respectively, which are much higher than those of MWCNTs and (C 59 N) 2 alone.…”

Section: Resultsmentioning

confidence: 99%

Rational Design of a Low-Dimensional and Metal-free Heterostructure for Efficient Water Oxidation: DFT and Experimental Studies

et al. 2022

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A nitrogen-doped fullerene dimer is synthesized and compounded with multi-walled carbon nanotubes (MWCNTs) to construct a low-dimensional and metal-free 0D–1D heterostructure for electrocatalytic water oxidation. The (C59N)2/MWCNTs heterostructure exhibits a highly efficient performance, as verified by both first-principles density functional theory and experimental studies. The *O → *OOH process is confirmed as the rate-determining step of water oxidation. The negatively charged N-doping leads to electronic redistribution and intermolecular charge transfer and thus reduces the uphill free energies of intermediates on the (C59N)2/MWCNTs interface. Therefore, the (C59N)2/MWCNTs heterostructure has great potential to emit light and heat in metal-free-based electrocatalytic water oxidation.

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“…With the further development of solar power generation, wind power generation, hydroelectric power generation and other technologies, the cost of green electricity is further reduced, providing new opportunities for power generation using an electrochemical energy conversion technology. [1][2][3][4][5][6] The high efficiency of electrocatalysis for energy conversion and its utilization was regarded as one of the important ways to solve the energy crisis. [7][8][9][10][11][12] The development of an electrochemical energy conversion technology not only contributes toward environmental protection but also raises expectations to become economically competitive.…”

Section: Introductionmentioning

confidence: 99%

Transformation mechanism of high-valence metal sites for the optimization of Co- and Ni-based OER catalysts in an alkaline environment: recent progress and perspectives

et al. 2023

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

Abstract: Exploring cost-effective non-precious metal electrocatalysts is vital for the large-scale application of clean energy conversion devices (i.e., fuel cells, metal-air batteries and water electrolyser). Herein, we present the construction of...

Cited by 18 publications

References 68 publications

Anchoring NiO Nanosheet on the Surface of CNT to Enhance the Performance of a Li-O2 Battery

Anchoring NiO Nanosheet on the Surface of CNT to Enhance the Performance of a Li-O2 Battery

Rational Design of a Low-Dimensional and Metal-free Heterostructure for Efficient Water Oxidation: DFT and Experimental Studies

Transformation mechanism of high-valence metal sites for the optimization of Co- and Ni-based OER catalysts in an alkaline environment: recent progress and perspectives

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