Prussian blue-derived synthesis of uniform nanoflakes-assembled NiS<sub>2</sub> hierarchical microspheres as highly efficient electrocatalysts in dye-sensitized solar cells

Huang, Shoushuang; Wang, Haitao; Zhang, Yang; Wang, Shangdai; Hu, Zhangjun; Qian, Xuefeng

doi:10.1039/c8ra00004b

Cited by 22 publications

(19 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result can be ascribed to the higher reaction activity at the edge of the nanotubes than that of plane parts, accordance with Yu's word and previous studies. [ 21,22 ] After reaction for 10 h, all the Ni–Co PBA nanocubes completely disappear, and uniform nanoplates‐assembled hierarchical microspheres can be obtained according to the SEM and TEM observations. Specifically, the relevant SEM in Figure 2f implies that the average size of the hierarchical microspheres is about 1.1 µm, much larger than that of Ni–Co PBA nanotubes.…”

Section: Resultsmentioning

confidence: 99%

“…To prepare Fe‐doped γ‐NiOOH/NiS x /Ni 9 S 8 precursor, well‐defined nickel‐cobalt Prussian blue analogous (Ni‐Co PBA) nanocubes with narrow size distribution were firstly synthesized through a coprecipitation reaction according to the previous work. [ 21 ] Then, 60 mg of as‐obtained Ni‐Co PBA nanocubes and 0.017 mmol of Fe(NO 3 ) 3 ∙9 H 2 O were added into 90 mL of mixed solvent of ethanol/H 2 O with a volume ratio of 2:1. After magnetic stirring for 30 min, 3.0 mL of (NH 4 ) 2 S (≥20%) aqueous solution was added and stirred evenly for another 30 min.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Construction of Fe‐doped NiS–NiS₂ Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water‐Urea Splitting

Huang

Zhang

Xin

et al. 2022

Small

Self Cite

View full text Add to dashboard Cite

Developing efficient and robust non‐precious‐metal‐based catalysts to accelerate electrocatalytic reaction kinetics is crucial for electrochemical water‐urea splitting. Herein, Fe‐doped NiS–NiS2 heterostructured microspheres, an electrocatalyst, are synthesized via etching Prussian blue analogues following a controlled annealing treatment. The resulting microspheres are constructed by mesoporous nanoplates, granting the virtues of large surface areas, high structural void porosity, and accessible inner surface. These advantages not only provide more redox reaction centers but also strengthen structural robustness and effectively facilitate the mass diffusion and charge transport. Density functional theory simulations validate that the Fe‐doping improves the conductivity of nickel sulfides, whereas the NiS–NiS2 heterojunctions induce interface charge rearrangement for optimizing the adsorption free energy of intermediates, resulting in a low overpotential and high electrocatalytic activity. Specifically, an ultralow overpotential of 270 mV at 50 mA cm−2 for the oxygen evolution reaction (OER) is achieved. After adding 0.33 M urea into 1 M KOH, Fe‐doped NiS–NiS2 obtains a strikingly reduced urea oxidation reaction potential of 1.36 V to reach 50 mA cm−2, around 140 mV less than OER. This work provides insights into the synergistic modulation of electrocatalytic activity of non‐noble catalysts for applications in energy conversion systems.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Construction of Fe‐doped NiS–NiS₂ Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water‐Urea Splitting

Huang

Zhang

Xin

et al. 2022

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…The improved J sc is beneficial to facilitate the reduction of I 3 − , and then gives rise to the fast regeneration of dye molecules . The improvement of FF can be attributed to the smaller charge‐transfer resistance at the CE/electrolyte interface . The result of photoelectric conversion efficiency measurement is in accordance with the ones from EIS, Tafel polarization and CV measurement, verifying the efficient electrocatalytic performance of Ni 0.5 Fe 0.5 S 2 /C.…”

Section: Resultsmentioning

confidence: 99%

A Facile Synthesis of Ternary Nickel Iron Sulfide Nanospheres as Counter Electrode in Dye‐Sensitized Solar Cells

Wei

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

The incorporation of a foreign metal into a material may adjust the surface electronic structure and promote charge transfer, which then ultimately improves electrical conductivity and electrocatalytic performance because of the possible charge delocalization between the metal cations. As a result, for the first time, ternary nickel iron sulfide nanospheres have been successfully fabricated through a two-step solvothermal approach with the help of glucose (Ni Fe S /C). Subsequently, the electrochemical performance and electrocatalytic activity of Ni Fe S /C were evaluated by electrochemical impedance spectroscopy, Tafel polarization and cyclic voltammetry, indicating high electrical conductivity and great electrocatalytic activity. Ni Fe S /C was employed as a counter electrode for dye-sensitized solar cells, and exhibited higher power conversion efficiency (6.79 %) than the device with Pt CE (6.31 %) under full sunlight illumination (100 mW cm , AM 1.5G).

show abstract

“…The observed decreasing order of performance was NiS 2 microspheres, Pt, and then NiS 2 nanoparticles. [ 222 ]…”

Section: Ni‐chalcogenides Based Energy Conversion and Storage Devicesmentioning

confidence: 99%

Emergence of Ni‐Based Chalcogenides (S and Se) for Clean Energy Conversion and Storage

Maurya

Khaladkar

Horn

et al. 2021

Small

View full text Add to dashboard Cite

Nickel chalcogenide (S and Se) based nanostructures intrigued scientists for some time as materials for energy conversion and storage systems. Interest in these materials is due to their good electrochemical stability, eco‐friendly nature, and low cost. The present review compiles recent progress in the area of nickel‐(S and Se)‐based materials by providing a comprehensive summary of their structural and chemical features and performance. Improving properties of the materials, such as electrical conductivity and surface characteristics (surface area and morphology), through strategies like nano‐structuring and hybridization, are systematically discussed. The interaction of the materials with electrolytes, other electro‐active materials, and inactive components are analyzed to understand their effects on the performance of energy conversion and storage devices. Finally, outstanding challenges and possible solutions are briefly presented with some perspectives toward the future development of these materials for energy‐oriented devices with high performance.

show abstract

Prussian blue-derived synthesis of uniform nanoflakes-assembled NiS₂ hierarchical microspheres as highly efficient electrocatalysts in dye-sensitized solar cells

Abstract: Hierarchical NiS2 microspheres constructed by nanoflakes were synthesized by sulfuration of nickel–cobalt Prussian blue analogous nanocubes and they exhibited excellent catalytic activity for the reduction of I3− ions in dye-sensitized solar cells.

Cited by 22 publications

References 53 publications

Construction of Fe‐doped NiS–NiS₂ Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water‐Urea Splitting

Construction of Fe‐doped NiS–NiS₂ Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water‐Urea Splitting

A Facile Synthesis of Ternary Nickel Iron Sulfide Nanospheres as Counter Electrode in Dye‐Sensitized Solar Cells

Emergence of Ni‐Based Chalcogenides (S and Se) for Clean Energy Conversion and Storage

Contact Info

Product

Resources

About

Prussian blue-derived synthesis of uniform nanoflakes-assembled NiS2 hierarchical microspheres as highly efficient electrocatalysts in dye-sensitized solar cells

Abstract: Hierarchical NiS2 microspheres constructed by nanoflakes were synthesized by sulfuration of nickel–cobalt Prussian blue analogous nanocubes and they exhibited excellent catalytic activity for the reduction of I3− ions in dye-sensitized solar cells.

Cited by 22 publications

References 53 publications

Construction of Fe‐doped NiS–NiS2 Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water‐Urea Splitting

Construction of Fe‐doped NiS–NiS2 Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water‐Urea Splitting

A Facile Synthesis of Ternary Nickel Iron Sulfide Nanospheres as Counter Electrode in Dye‐Sensitized Solar Cells

Emergence of Ni‐Based Chalcogenides (S and Se) for Clean Energy Conversion and Storage

Contact Info

Product

Resources

About

Prussian blue-derived synthesis of uniform nanoflakes-assembled NiS₂ hierarchical microspheres as highly efficient electrocatalysts in dye-sensitized solar cells

Construction of Fe‐doped NiS–NiS₂ Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water‐Urea Splitting

Construction of Fe‐doped NiS–NiS₂ Heterostructured Microspheres Via Etching Prussian Blue Analogues for Efficient Water‐Urea Splitting