A strongly coupled 3D ternary Fe2O3@Ni2P/Ni(PO3)2 hybrid for enhanced electrocatalytic oxygen evolution at ultra-high current densities

Cheng, Xiaodi; Pan, Zhiyan; Lei, Chaojun; Jin, Yangjun; Yang, Bin; Li, Zhongjian; Zhang, Qizhou; Lei, Lecheng; Yuan, Chris; Hou, Yang

doi:10.1039/c8ta11223a

Cited by 176 publications

(98 citation statements)

References 51 publications

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“…As a comparison, XRD patterns of Ni−P‐CP precursor and its reduction products under hydrogen atmosphere and different temperatures was researched. As shown in Figure (b), when the calcination temperature was 773 K, Ni−P‐CP precursor resolved into Ni(PO 3 ) 2 and a small amount of Ni 5 P 4 . When the calcination temperature rose to 873 K, Ni(PO 3 ) 2 continued resolving into Ni 5 P 4 , whose diffraction peak intensity was enhanced, and when the calcination temperature rose to 973 K, Ni 2 P was formed.…”

Section: Resultssupporting

confidence: 89%

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Organodiphosphonate Metal‐Organic Frameworks Derived Ni‐P@C Catalyst for Hydrogenation of Furfural

Jiang

Zhu

et al. 2020

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Tetraethyl p‐xylenediphosphate is used as the organic ligand to prepare the Ni−P‐MOFs material belonging to the category of organic phosphoric acids, through pyrolysis and in‐situ reduction reaction of Ni−P‐MOFs material during the high‐temperature carbonization process, Ni−P@C catalyst with graphitized carbon‐covering Ni2P particles is prepared. Compared with Ni−P catalyst prepared through coprecipitation method, Ni−P@C catalyst prepared with Ni−P‐MOFs material can obviously decrease the formation temperature of Ni2P active phase and retain the schistose morphology of the Ni−P‐MOFs material, which is of high specific area, and meanwhile effectively suppresses the agglomeration of Ni2P particles. It is indicated by research on furfural hydrogenation performance that, Ni−P@C catalyst presents a high activity and stability in furfural hydrogenation. Products of furfural hydrogenation catalyzed by Ni−P@C catalyst mainly contain furfuryl alcohol, 2‐methylfuran and 2‐methyltetra hydrofuran, and the reaction temperature and reaction time have great influence on the distribution of products. The carbon‐covering structure of Ni−P@C catalyst can effectively protect the active components of Ni2P, thus presenting a high stability and good reusability.

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Section: Resultssupporting

confidence: 89%

“…Ni 2 P particles presented a large granulate in Ni−P catalyst (Figure (e)). The lattic spacings of 0.192 and 0.204 nm (Figure (f)) correspond to the lattice planes (210) and (201) of Ni 2 P, respectively …”

Section: Resultsmentioning

confidence: 96%

Organodiphosphonate Metal‐Organic Frameworks Derived Ni‐P@C Catalyst for Hydrogenation of Furfural

Jiang

Zhu

et al. 2020

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“…The charge transfer resistance of EG/(Co, Ni)Se 2 -NC hybrid was the lowest among all the investigated samples, suggesting the facile electron transfer in the EG/(Co, Ni)Se 2 -NC. Especially, the semi-circle of EG/(Co, Ni)Se 2 -NC hybrid was evidently smaller than that of EG/CoSe 2 -NC, manifesting that the presence of Ni species in this hybrid could make the electron transfer process more quick and therefore contribute to a higher electro-catalyzing performance [1,31]. Furthermore, the durability of EG/(Co, Ni)Se 2 -NC hybrid was examined via a chronoamperometric method at a constant current density of 20 mA cm −2 (inset of Fig.…”

Section: Resultsmentioning

confidence: 95%

“…Reliable and sustainable supply of clean energy has recently emerged as a critical socioeconomic megatrend [1][2][3][4]. Hydrogen, an ideal carbon-free energy source, with high heat value and environment-friendly characteristics, can be produced by electrochemical water splitting.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Carbon-Encased Bimetallic Selenide for High-Performance Water Electrolysis

et al. 2019

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HIGHLIGHTS• N-Doped carbon-encased bimetallic selenide hybrid with strong synergistic effect is constructed.• N-Doped carbon-encased bimetallic selenide hybrid exhibits an excellent catalytic activity and stability for oxygen evolution reaction (OER) in alkaline media.• The superior OER activity is attributed to the highly active Co-OOH species and modified electron transfer process from Ni atoms.ABSTRACT Demand of highly efficient earth-abundant transition metal-based electrocatalysts to replace noble metal materials for boosting oxygen evolution reaction (OER) is rapidly growing. Herein, an electrochemically exfoliated graphite (EG) foil supported bimetallic selenide encased in N-doped carbon (EG/(Co, Ni)Se 2 -NC) hybrid is developed and synthesized by a vapor-phase hydrothermal strategy and subsequent selenization process. The as-prepared EG/ (Co, Ni)Se 2 -NC hybrid exhibits a core-shell structure where the particle diameter of (Co, Ni)Se 2 core is about 70 nm and the thickness of N-doped carbon shell is approximately 5 nm. Benefitting from the synergistic effects between the combination of highly active Co species and improved electron transfer from Ni species, and N-doped carbon, the EG/(Co, Ni)Se 2 -NC hybrid shows remarkable electrocatalytic activity toward OER with a comparatively low overpotential of 258 mV at an current density of 10 mA cm −2 and a small Tafel slope of 73.3 mV dec −1 . The excellent OER catalysis performance of EG/(Co, Ni)Se 2 -NC hybrid is much better than that of commercial Ir/C (343 mV at 10 mA cm −2 and 98.1 mV dec −1 ), and even almost the best among all previously reported binary CoNi selenide-based OER electrocatalysts. Furthermore, in situ electrochemical Raman spectroscopy combined with ex situ X-ray photoelectron spectroscopy analysis indicates that the superb OER catalysis activity can be attributed to the highly active Co-OOH species and modified electron transfer process from Ni element.

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“…[34] Figure 8h displays the P 2p spectra of the Fe(PO 3 ) 2 /Fe 2 O 3 /C HNSs which correspond to P 2p3/2 (132.97 eV) and P 2p1/2 (133.80 eV). [35,36] The O 1s spectra of Fe(PO 3 ) 2 /Fe 2 O 3 /C HNSs ( Figure S11) can be separately fitted to PÀ O (531.10 eV), FeÀ O (533.62 eV), FeÀ P (535.18 eV). [37] As shown in Figure S12…”

Section: Full Papermentioning

confidence: 99%

In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres

et al. 2019

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In this paper, Fe3O4 nanoparticles (Fe3O4 NPs) with an average diameter of 10 nm were grown in situ on the shell of hollow mesoporous carbon nanospheres (HMCNs) to form a new type of sesame balls‐like Fe3O4/C hollow nanospheres (HNSs) by thermal decomposition. After vulcanization and phosphating, Fe3O4/C HNSs are transformed into Fe7S8/C HNSs and Fe(PO3)2/Fe2O3/C HNSs, respectively. Compared with Fe3O4/C HNSs and Fe(PO3)2/Fe2O3/C HNSs, Fe7S8/C HNSs display good cycling stability as anode material for lithium ion batteries. When the current density is 1 A g−1, the reversible specific capacity of Fe7S8/C HNSs is 1006 mA h g−1 after 250 cycles. The rate performance and electrochemical properties of Fe7S8/C HNSs are significantly improved. Research shows that the capacitive behavior plays a major role in specific capacity contribution of Fe7S8/C HNSs electrode. The anchoring of Fe7S8 NPs on the shell of HMCNs avoids the aggregation of Fe7S8 NPs, promote the conductivity of composite and boost the delivery of electrons. This idea and expedient method of construction can be broadened to synthesize other hollow nanostructured material with preferable electrochemistry performance.

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A strongly coupled 3D ternary Fe₂O₃@Ni₂P/Ni(PO₃)₂ hybrid for enhanced electrocatalytic oxygen evolution at ultra-high current densities

Abstract: A ternary Fe2O3@Ni2P/Ni(PO3)2 hybrid with strong coupling and synergistic effects was developed for highly active OER at ultra-high current densities.

Cited by 176 publications

References 51 publications

Organodiphosphonate Metal‐Organic Frameworks Derived Ni‐P@C Catalyst for Hydrogenation of Furfural

Organodiphosphonate Metal‐Organic Frameworks Derived Ni‐P@C Catalyst for Hydrogenation of Furfural

Nitrogen-Doped Carbon-Encased Bimetallic Selenide for High-Performance Water Electrolysis

In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres

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A strongly coupled 3D ternary Fe2O3@Ni2P/Ni(PO3)2 hybrid for enhanced electrocatalytic oxygen evolution at ultra-high current densities

Abstract: A ternary Fe2O3@Ni2P/Ni(PO3)2 hybrid with strong coupling and synergistic effects was developed for highly active OER at ultra-high current densities.

Cited by 176 publications

References 51 publications

Organodiphosphonate Metal‐Organic Frameworks Derived Ni‐P@C Catalyst for Hydrogenation of Furfural

Organodiphosphonate Metal‐Organic Frameworks Derived Ni‐P@C Catalyst for Hydrogenation of Furfural

Nitrogen-Doped Carbon-Encased Bimetallic Selenide for High-Performance Water Electrolysis

In Situ Derivatization for Boosted Lithium Storage Performance of Fe7S8/C Hollow Nanospheres

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A strongly coupled 3D ternary Fe₂O₃@Ni₂P/Ni(PO₃)₂ hybrid for enhanced electrocatalytic oxygen evolution at ultra-high current densities

In Situ Derivatization for Boosted Lithium Storage Performance of Fe₇S₈/C Hollow Nanospheres