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2D PdAg Alloy Nanodendrites for Enhanced Ethanol Electroxidation.

Wenjing Huang1, Xiaolin Kang2, Cheng Xu2

  • 1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China.

Advanced Materials (Deerfield Beach, Fla.)
|January 17, 2018
PubMed
Summary

Researchers developed novel 2D palladium-silver (PdAg) alloy nanodendrites for efficient ethanol electroxidation. These catalysts offer enhanced activity and stability, crucial for advancing direct ethanol fuel cells.

Keywords:
2D nanodendritesPdAg alloyethanol electroxidationoperation stabilitysurfactant

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Direct ethanol fuel cells (DEFCs) require highly active and stable electrocatalysts for ethanol electroxidation.
  • Progress in DEFC commercialization is hindered by limitations in current electrocatalyst performance.

Purpose of the Study:

  • To synthesize and characterize novel 2D palladium-silver (PdAg) alloy nanodendrites.
  • To evaluate the electrocatalytic performance of these PdAg nanodendrites for ethanol electroxidation.

Main Methods:

  • Facile solution synthesis using coreduction of Pd and Ag precursors.
  • Octadecyltrimethylammonium chloride used as a structural directing agent.
  • Characterization of nanodendrite morphology, surface area, and active sites.

Main Results:

  • Synthesized 2D PdAg alloy nanodendrites with 5-7 nm thickness and in-plane branching.
  • Achieved high specific current density (≈2600 mA mgPd-1) for ethanol electroxidation.
  • Demonstrated excellent operational stability through cycling and chronoamperometric tests.

Conclusions:

  • The 2D PdAg alloy nanodendrites exhibit superior electrocatalytic activity and stability.
  • Enhanced performance is attributed to combined electronic and structural effects of the alloy nanodendrites.
  • These findings represent a significant advancement for direct ethanol fuel cell technology.