Organic-inorganic hybrids-directed ternary NiFeMoS anemone-like nanorods with scaly surface supported on nickel foam for efficient overall water splitting

Yan, Kai-Li; Qin, Jun-Feng; Liu, Zi-Zhang; Dong, Bin; Chi, Jing‐Qi; Gao, Wen-Kun; Lin, Jai-Ming; Chai, Yong‐Ming; Liu, Chenguang

doi:10.1016/j.cej.2017.10.074

Cited by 223 publications

(59 citation statements)

References 67 publications

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“…[66] Note that the formed surface (oxy)hydroxide layer would gradually achieve a stable state and avoid a further oxidation of the catalyst core, forming an interface between the incipient catalyst and the fresh Ni-Fe (oxy)hydroxides. [68][69][70] This interface might be beneficial to improving the OH − adsorption and thus the OER catalytic activity.…”

Section: Resultsmentioning

confidence: 99%

Ultrathinning Nickel Sulfide with Modulated Electron Density for Efficient Water Splitting

Fei

Chen

Liu

et al. 2020

Advanced Energy Materials

270

140

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Developing nonprecious electrocatalysts via a cost‐effective methods to synergistically achieve high active sites exposure and optimized intrinsic activity remains a grand challenge. Here a low‐cost and scaled‐up chemical etching method is developed for transforming nickel foam (NF) into a highly active electrocatalyst for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). The synthetic method involves a Na2S‐induced chemical etching of NF in the presence of Fe, leading to a growth of ultrathin Fe‐doped Ni3S2 arrays on the NF substrate (FexNi3‐xS2 @ NF). The combined experimental and theoretical investigations reveal that the incorporated Fe cations significantly modulate the morphology and the surface electron density of Ni3S2, and thus significantly boost the electrochemically active surface area, electron transfer, and optimize the hydrogen/water absorption free energy. The developed Fe0.9Ni2.1S2 @ NF requires overpotentials of only 72 mV at 10 mA cm−2 for HER and 252 mV at 100 mA cm−2 for OER in 1.0 m KOH, respectively, enabling an alkaline electrolyzer at a low cell voltage of 1.51 V to drive 10 mA cm−2 for overall water splitting. More broadly, this synthetic approach is very versatile and can be used to synthesize other ultrathin metal sulfides (e.g., Fe–Cu–S, Fe–Al–S, and Fe–Ti–S).

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Section: Resultsmentioning

confidence: 99%

Ultrathinning Nickel Sulfide with Modulated Electron Density for Efficient Water Splitting

Fei

Chen

Liu

et al. 2020

Advanced Energy Materials

270

140

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“…The limitedr eserves and severe environmental contamination of fossil fuels have motivated researchers to probe clean and sustainable energy alternatives. [1][2][3][4] As ar esult of its high energy density and renewability,h ydrogen is ap otential alternative to fossil fuels. [5][6][7] Electrochemical water splitting to produce highly pure hydrogen is one of the most sustainable and promising strategies because of its high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Evolution Activity of Ruthenium Phosphides Encapsulated in Nitrogen‐ and Phosphorous‐Codoped Hollow Carbon Nanospheres

et al. 2018

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RuP nanoparticles (NPs) encapsulated in uniform N,P-codoped hollow carbon nanospheres (RuP @NPC) have been synthesized through a facile route in which aniline-pyrrole copolymer nanospheres are used to disperse Ru ions followed by a gas phosphorization process. The as-prepared RuP @NPC exhibits a uniform core-shell hollow nanospherical structure with RuP NPs as the core and N,P-codoped carbon (NPC) as the shell. This strategy integrates many advantages of hollow nanostructures, which provide a conductive substrate and the doping of a nonmetal element. At high temperatures, the obtained thin NPC shell can not only protect the highly active phase of RuP NPs from aggregation and corrosion in the electrolyte but also allows variation in the electronic structures to improve the charge-transfer rate greatly by N,P codoping. The optimized RuP @NPC sample at 900 °C exhibits a Pt-like performance for the hydrogen evolution reaction (HER) and long-term durability in acidic, alkaline, and neutral solutions. The reaction requires a small overpotential of only 51, 74, and 110 mV at 10 mA cm in 0.5 m H SO , 1.0 m KOH, and 1.0 m phosphate-buffered saline, respectively. This work provides a new way to design unique phosphide-doped carbon heterostructures through an inorganic-organic hybrid method as excellent electrocatalysts for HER.

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“…C 1s peak at 284.8 eV was used as reference. [44][45][46][47][48][49] The corresponding satellite peaks are located at the higher binding energies . [44][45][46][47][48][49] The corresponding satellite peaks are located at the higher binding energies .…”

Section: Sem Xrd Xps and Tem Characterizationmentioning

confidence: 99%

“…In the high-resolution XPS (HRXPS) spectra of Ni 2p (Figure 2c), the binding energies at 852.8 � 0.1 eV and 856.2 � 0.1 eV are indexed to Ni 0 and Ni 3 + , respectively. [44][45][46][47][48][49] The corresponding satellite peaks are located at the higher binding energies . In the HRXPS spectra of Mo 3d (Figure 2d), the peaks at 228.2 � 0.2 eV, 229.2 � 0.2 eV, 230.3 � 0.2 eV, and 232.3 � 0.2 eV eV are indexed to Mo 0 , Mo + 4 , Mo + 5 , and Mo + 6 , respectively.…”

Section: Sem Xrd Xps and Tem Characterizationmentioning

confidence: 99%

Network‐Like Ni_1−xMo_x Nanosheets: Multi‐Functional Electrodes for Overall Water Splitting and Supercapacitor

et al. 2019

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Exploring efficient, abundant, cheap and stable materials for the electrolysis of water and supercapacitor is a challenging task. Here, Ni 1À x Mo x nanosheets are obtained on carbon cloth (CC), which can be multi-functional electrodes for electrochemical applications. Impressively, we find that the electrochemical abilities can be optimized by constructing network-like nanosheets and tuning the ratio of Ni and Mo in the alloy. To acquire a current density of 10 mA cm À 2 (j 10 ), Ni 0.75 Mo 0.25 /CC shows the lowest overpotentials (79 mV for hydrogen evolution reaction (HER) and 330 mV for oxygen evolution reaction (OER)) in 1 M KOH. Using Ni 0.75 Mo 0.25 /CC as both positive and negative poles, the cell only requires a potential of 1.74 V to reach j 10 and shows long-term durability. We further show that Ni 0.75 Mo 0.25 electrode exhibits a superior specific capacitance (422 F g À 1 at 1 A g À 1 ) and high capacitance retention (108.2 % after 1000 cycles) in 1 M KOH. The super-electrochemical performances of Ni 0.75 Mo 0.25 /CC is attributed to its high electronic conductivity, rich active sites, and large surface area. We believe that the Ni 0.75 Mo 0.25 /CC electrode with extraordinary electrochemical performances is a hopeful material for practical applications in both electrocatalysis and supercapacitors (SC).

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Organic-inorganic hybrids-directed ternary NiFeMoS anemone-like nanorods with scaly surface supported on nickel foam for efficient overall water splitting

Cited by 223 publications

References 67 publications

Ultrathinning Nickel Sulfide with Modulated Electron Density for Efficient Water Splitting

Ultrathinning Nickel Sulfide with Modulated Electron Density for Efficient Water Splitting

Hydrogen Evolution Activity of Ruthenium Phosphides Encapsulated in Nitrogen‐ and Phosphorous‐Codoped Hollow Carbon Nanospheres

Network‐Like Ni_1−xMo_x Nanosheets: Multi‐Functional Electrodes for Overall Water Splitting and Supercapacitor

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Organic-inorganic hybrids-directed ternary NiFeMoS anemone-like nanorods with scaly surface supported on nickel foam for efficient overall water splitting

Cited by 223 publications

References 67 publications

Ultrathinning Nickel Sulfide with Modulated Electron Density for Efficient Water Splitting

Ultrathinning Nickel Sulfide with Modulated Electron Density for Efficient Water Splitting

Hydrogen Evolution Activity of Ruthenium Phosphides Encapsulated in Nitrogen‐ and Phosphorous‐Codoped Hollow Carbon Nanospheres

Network‐Like Ni1−xMox Nanosheets: Multi‐Functional Electrodes for Overall Water Splitting and Supercapacitor

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Network‐Like Ni_1−xMo_x Nanosheets: Multi‐Functional Electrodes for Overall Water Splitting and Supercapacitor