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Cited by 259Electrocatalysts for Energy ConversionElectrochemical sensors and biosensorsCatalytic Processes in Materials Science

The DOI matches its Crossref record; 41 of the 41 references it cites were found in a registry or an index.

Single‐Crystalline Ultrathin Nickel Nanosheets Array from In Situ Topotactic Reduction for Active and Stable Electrocatalysis

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Kuang, Yun, Feng, Guang, Li, Pengsong, Bi, Yongmin, Li, Yaping, Sun, Xiaoming·2016·Angewandte Chemie International Edition
DOI 10.1002/anie.201509616PMC PMC4706644
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Abstract

Simultaneously synthesizing and structuring atomically thick or ultrathin 2D non-precious metal nanocrystal may offer a new class of materials to replace the state-of-art noble-metal electrocatalysts; however, the synthetic strategy is the bottleneck which should be urgently solved. Here we report the synthesis of an ultrathin nickel nanosheet array (Ni-NSA) through in situ topotactic reduction from Ni(OH)2 array precursors. The Ni nanosheets showed a single-crystalline lamellar structure with only ten atomic layers in thickness and an exposed (111) facet. Combined with a superaerophobic (low bubble adhesive) arrayed structure the Ni-NSAs exhibited a dramatic enhancement on both activity and stability towards the hydrazine-oxidation reaction (HzOR) relative to platinum. Furthermore, the partial oxidization of Ni-NSAs in ambient atmosphere resulted in effective water-splitting electrocatalysts for the hydrogen-evolution reaction (HER).

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Crossref · 10.1002/anie.201509616

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Scheme 1 In situ topotactic reduction method for fabrication of the atomically layered Ni nanosheet array.
Scheme 1 In situ topotactic reduction method for fabrication of the atomically layered Ni nanosheet array.CC BY-NC · PubMed Central
Figure 1 A) XRD pattern of the Ni(OH)2 nanosheet array and Ni-NSA grown on an Ni foam substrate and a Cu foam substrate. The two lines at the base show standard XRD patterns of Cu and Ni metals. B) SEM and HRSEM (inset) images of as synthesized Ni-NSA. C,D) TEM and corresponding electron diffraction pattern of C) two overlapped Ni nanosheets and D) a single layered region, demonstrating a single-crystalline structure. E) HRTEM image (inset shows crystal lattices) of Ni nanosheets.
Figure 1 A) XRD pattern of the Ni(OH)2 nanosheet array and Ni-NSA grown on an Ni foam substrate and a Cu foam substrate. The two lines at the base show standard XRD patterns of Cu and Ni metals. B) SEM and HRSEM (inset) images of as synthesized Ni-NSA. C,D) TEM and corresponding electron diffraction pattern of C) two overlapped Ni nanosheets and D) a single layered region, demonstrating a single-crystalline structure. E) HRTEM image (inset shows crystal lattices) of Ni nanosheets.CC BY-NC · PubMed Central
Figure 2 A,C) SEM images of an as-synthesized Ni(OH)2 nanowall array and Ni-NSA. B,D) HRTEM image of a scrolled Ni(OH)2 nanowall and a vertically laid Ni nanosheet. The inset shows the thickness of the Ni(OH)2 nanowall and Ni nanosheet.
Figure 2 A,C) SEM images of an as-synthesized Ni(OH)2 nanowall array and Ni-NSA. B,D) HRTEM image of a scrolled Ni(OH)2 nanowall and a vertically laid Ni nanosheet. The inset shows the thickness of the Ni(OH)2 nanowall and Ni nanosheet.CC BY-NC · PubMed Central
Figure 3 A) Schematic of the Ni-NSA catalytic hydrazine oxidation. B) HzOR performance of Ni-NSA, 3D porous Ni nanoparticle assembly (Ni-NPA), Cu nanosheet array, and commercial Pt/C (loaded on a Ni foam). C) Comparison of the specific activity and mass activity of Ni-NSA, Ni-NPAs, and 20 wt % Pt/C. An 81 % enhancement was observed for Ni-NSA. The specific activity and mass activity were currents normalized to geometric areas of the nickel foam substrates and the mass loading of the samples, respectively. D) Nyquist plots of the four electrodes, indicating that Ni-NSA possessed a much smaller charge-transfer resistance. Note: the loading amount of Pt/C was twice that of Ni-NSA because of the poor adhesion to the substrate. The mass loadings of Ni-NSA and Ni-NPA were 0.59 mg cm−2 and 0.81 mg cm−2, respectively.
Figure 3 A) Schematic of the Ni-NSA catalytic hydrazine oxidation. B) HzOR performance of Ni-NSA, 3D porous Ni nanoparticle assembly (Ni-NPA), Cu nanosheet array, and commercial Pt/C (loaded on a Ni foam). C) Comparison of the specific activity and mass activity of Ni-NSA, Ni-NPAs, and 20 wt % Pt/C. An 81 % enhancement was observed for Ni-NSA. The specific activity and mass activity were currents normalized to geometric areas of the nickel foam substrates and the mass loading of the samples, respectively. D) Nyquist plots of the four electrodes, indicating that Ni-NSA possessed a much smaller charge-transfer resistance. Note: the loading amount of Pt/C was twice that of Ni-NSA because of the poor adhesion to the substrate. The mass loadings of Ni-NSA and Ni-NPA were 0.59 mg cm−2 and 0.81 mg cm−2, respectively.CC BY-NC · PubMed Central
Figure 4 A) Schematic of partial oxidization on the Ni-NSA surface. B) HRTEM image and corresponding fast Fourier transformation (FFT) of a Ni nanosheet exposed in ambient atomsphere. C) HER performance of Ni/NiO-NSAs with different oxidation degree. D) HER polarization curves of Ni/NiO-NSAs, 3D porous Ni/NiO nanoparticle assembly (Ni/NiO-NPA), pure Ni foam, and commercial Pt/C (loaded on the Ni foam). Note: the loading amount of Pt/C was twice that of Ni/NiO-NSA because of the poor adhesion to the substrate.
Figure 4 A) Schematic of partial oxidization on the Ni-NSA surface. B) HRTEM image and corresponding fast Fourier transformation (FFT) of a Ni nanosheet exposed in ambient atomsphere. C) HER performance of Ni/NiO-NSAs with different oxidation degree. D) HER polarization curves of Ni/NiO-NSAs, 3D porous Ni/NiO nanoparticle assembly (Ni/NiO-NPA), pure Ni foam, and commercial Pt/C (loaded on the Ni foam). Note: the loading amount of Pt/C was twice that of Ni/NiO-NSA because of the poor adhesion to the substrate.CC BY-NC · PubMed Central

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Metadata

Authors
Kuang, Y., Feng, G., Li, P., Bi, Y., Li, Y., & Sun, X.
Affiliations
State Key Laboratory of Chemical Resource Engineering (CN)
Corresponding author
Sun, Xiaoming
ORCID
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2015-11-19
Volume
55
Issue
2
Pages
693-697
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
DOI
10.1002/anie.201509616
PMC
PMC4706644
OpenAlex
W2173150847
Cited by
259
References
41
Citations by year
2026: 4 · 2025: 15 · 2024: 13 · 2023: 19 · 2022: 20 · 2021: 39 · 2020: 32 · 2019: 30 · 2018: 32 · 2017: 35 · 2016: 20
FWCI
8.59
Type
journal article
Language
en
Open access
Licence
Locations
  • Angewandte Chemie International Edition (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • Funded Access
  • National Natural Science Foundation of China
  • 973 Program (2011CBA00503, 2011CB932403)
  • Program for Changjiang Scholars and Innovative Research Team in the University
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Chemistry › Analytical Chemistry › Electrochemical sensors and biosensors
  • Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
Keywords
topotactic reduction, superaerophobic surfaces, hydrazine oxidation, hydrogen evolution reaction, water splitting, non-precious metal electrocatalysts, catalyst stability

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