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Atomically thick Ni(OH)2 nanomeshes for urea electrooxidation.

Yu Ding1, Ying Li, Yuanyuan Xue

  • 1Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, PR China. jyc@snnu.edu.cn lishuni@snnu.edu.cn.

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|December 21, 2018
PubMed
Summary
This summary is machine-generated.

Atomically thick nickel hydroxide nanomeshes (Ni(OH)2-NMs) were synthesized using a novel direct chemical method. These nanomeshes demonstrate enhanced electrocatalytic performance for urea oxidation.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Atomically thick ultrathin nanomeshes (NMs) combine properties of 2D nanomaterials and porous materials.
  • NMs are of increasing interest for catalysis and electrocatalysis applications.
  • Conventional methods for NM synthesis often involve post-etching steps.

Purpose of the Study:

  • To report a direct chemical synthesis of atomically thick Ni(OH)2-NMs.
  • To overcome limitations of post-etching methods for NM synthesis.
  • To evaluate the electrocatalytic performance of Ni(OH)2-NMs for the urea oxidation reaction.

Main Methods:

  • Direct chemical synthesis using NaBH4 assisted cyanogel hydrolysis.
  • Physical characterization using various techniques to determine structural properties.
  • Electrocatalytic performance evaluation for the urea oxidation reaction in an alkaline electrolyte.

Main Results:

  • Successfully synthesized atomically thick Ni(OH)2-NMs with 1.7 nm thickness.
  • Characterization revealed large surface area, abundant nanoholes, and low-coordination surface/edge atoms.
  • Ni(OH)2-NMs exhibited superior electrocatalytic activity for urea oxidation compared to nanoparticles.

Conclusions:

  • The direct synthesis method provides an efficient route to novel Ni(OH)2-NMs.
  • The unique nanostructure of Ni(OH)2-NMs enhances electrocatalytic activity.
  • These Ni(OH)2-NMs show promise for efficient urea oxidation electrocatalysis.