Fe-Doped CoP holey nanosheets as bifunctional electrocatalysts for efficient hydrogen and oxygen evolution reactions

Xu, Shengjie; Qi, Yue; Lu, Yikai; Sun, Shichao; Liu, Yu; Jiang, Deli

doi:10.1016/j.ijhydene.2021.05.151

Cited by 32 publications

(18 citation statements)

References 70 publications

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“…It can be expected that the presence of a holey nanostructure can not only promote the charge transfer across ions and make electrolyte ions easily accessible to the active sites of the catalysts, 27 but also provide abundant active sites for the OER process. 28 After electrodeposition as depicted in Fig. 1c, a large amount of FeOOH nanoparticles had been successfully decorated on the edge and surface of the porous nanosheets.…”

Section: Resultsmentioning

confidence: 99%

Amorphous FeOOH nanoparticles decorated on defect-rich porous Ni MOF nanosheet based hierarchical architectures toward superior OER performance

Yao

Pei

et al. 2022

New J. Chem.

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Section: Resultsmentioning

confidence: 99%

Amorphous FeOOH nanoparticles decorated on defect-rich porous Ni MOF nanosheet based hierarchical architectures toward superior OER performance

Yao

Pei

et al. 2022

New J. Chem.

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“…Figure e is the high-resolution N 1s spectrum. The peaks correspond to graphite-N (401.2 eV), pyridine-N (398.6 eV), and Co–N x bonds (399.9 eV), respectively. − We also compared the nitrogen content of the three materials (Table S3) and found that the graphitic nitrogen content of Co-MOF@Zn-800 is much higher than that of Co/Zn-MOF-800 and Co-MOF-800. As shown in Figure S3, we compared the XPS spectra of the three catalysts, and we found that in the spectrum of Co 2p, the Co 0 bond was present in both Co-MOF@Zn-800 and Co/Zn-MOF-800, and the peak of Co-MOF@Zn-800 was more prominent.…”

Section: Resultsmentioning

confidence: 99%

Improved the Electrocatalytic Hydrogen Evolution Performances of Co-MOF Derivatives Through Introducing Zinc Ions by Two Ways

et al. 2022

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Due to the high price and rareness of precious metal electrocatalysts, the preparation of cheap, high-efficiency nonprecious metal electrocatalysts is urgently needed. In this paper, a Co-metal-organic framework (MOF) has been synthesized by the hydrothermal method. In view of the poor electrocatalytic performance of pristine Co-MOF, we used it as a template and obtained the Co-MOF-800 electrocatalyst by high-temperature calcination at 800 °C under a nitrogen atmosphere. To further improve the electrocatalytic hydrogen evolution performance, we used two methods to synthesize cobalt/zinc bimetallic-based electrocatalysts. The first method is adding zinc ions to Co-MOF and stirring to obtain Co-MOF@Zn; the second method is adding zinc ions during the in situ synthesis to obtain Co/Zn-MOF. Finally, Co-MOF@Zn-800 and Co/Zn-MOF-800 were obtained by pyrolysis at 800 °C under a nitrogen atmosphere. The electrocatalytic hydrogen evolution results show that Co-MOF@Zn-800 and Co/Zn-MOF-800 obtained by doping and introducing zinc ions have larger specific surface areas of 369.837 and 347.898 m2 g–1, respectively, and better electrocatalytic hydrogen evolution performances in 0.5 M sulfuric acid. The overpotentials are 218 and 236 mV at a 10 mA cm–2 current density, and the Tafel slopes are 146.6 and 187.0 mV dec–1. After 40 h of stability testing, the Co-MOF@Zn-800 material still holds a nearly constant current density.

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“…In the case of the Co 2p spectrum, as presented in Figure 3 b, the four deconvoluted peaks at 781.9, 798.4, 778.9, and 794.1 eV were ascribed to Co 2p 3/2 and Co 2p 1/2 of Co 2+ , Co 2p 3/2 and Co 2p 1/2 of Co 3+ [ 47 ], respectively, while the two peaks at 785.0 and 803.3 eV were ascribed to the satellites, suggesting the existence of mixed Co 2+ and Co 3+ , possibly originating from the partial surface oxidation of the metal sulfide. As displayed in Figure 3 c, the Fe 2p spectrum with two characteristic peaks at 714.4 and 721.1 eV implies the presence of Fe 3+ for the Fe-CoS 2 /NC-3 sample [ 48 , 49 ]. Figure 3 d shows the S 2p spectrum, and there were two major peaks located at 163.2 and 164.5 eV, attributed to S 2p 3/2 and S 2p 1/2 of the metal-sulfur bonds, respectively [ 50 , 51 ].…”

Section: Resultsmentioning

confidence: 99%

Prussian Blue Analogue-Derived Fe-Doped CoS2 Nanoparticles Confined in Bayberry-like N-Doped Carbon Spheres as Anodes for Sodium-Ion Batteries

Liu

Cai

et al. 2023

Polymers

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Obvious volume change and the dissolution of polysulfide as well as sluggish kinetics are serious issues for the development of high performance metal sulfide anodes for sodium-ion batteries (SIBs), which usually result in fast capacity fading during continuous sodiation and desodiation processes. In this work, by utilizing a Prussian blue analogue as functional precursors, small Fe-doped CoS2 nanoparticles spatially confined in N-doped carbon spheres with rich porosity were synthesized through facile successive precipitation, carbonization, and sulfurization processes, leading to the formation of bayberry-like Fe-doped CoS2/N-doped carbon spheres (Fe-CoS2/NC). By introducing a suitable amount of FeCl3 in the starting materials, the optimal Fe-CoS2/NC hybrid spheres with the designed composition and pore structure exhibited superior cycling stability (621 mA h g−1 after 400 cycles at 1 A g−1) and improved the rate capability (493 mA h g−1 at 5 A g−1). This work provides a new avenue for the rational design and synthesis of high performance metal sulfide-based anode materials toward SIBs.

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Fe-Doped CoP holey nanosheets as bifunctional electrocatalysts for efficient hydrogen and oxygen evolution reactions

Cited by 32 publications

References 70 publications

Amorphous FeOOH nanoparticles decorated on defect-rich porous Ni MOF nanosheet based hierarchical architectures toward superior OER performance

Amorphous FeOOH nanoparticles decorated on defect-rich porous Ni MOF nanosheet based hierarchical architectures toward superior OER performance

Improved the Electrocatalytic Hydrogen Evolution Performances of Co-MOF Derivatives Through Introducing Zinc Ions by Two Ways

Prussian Blue Analogue-Derived Fe-Doped CoS2 Nanoparticles Confined in Bayberry-like N-Doped Carbon Spheres as Anodes for Sodium-Ion Batteries

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