High surface area electrodes by template-free self-assembled hierarchical porous gold architecture

Ahiud Morag, Tatiana Golub, James Becker, Raz Jelinek

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The electrode active surface area is a crucial determinant in many electrochemical applications and devices. Porous metal substrates have been employed in electrode design, however construction of such materials generally involves multistep processes, generating in many instances electrodes exhibiting incomplete access to internal pore surfaces. Here we describe fabrication of electrodes comprising hierarchical, nano-to-microscale porous gold matrix, synthesized through spontaneous crystallization of gold thiocyanate in water. Cyclic voltammetry analysis revealed that the specific surface area of the conductive nanoporous Au microwires was very high and depended only upon the amount of gold used, not electrode areas or geometries. Application of the electrode in a pseudo-capacitor device is presented.

Original languageEnglish
Pages (from-to)84-89
Number of pages6
JournalJournal of Colloid and Interface Science
Volume472
DOIs
StatePublished - 15 Jun 2016

Keywords

  • Gold thiocyanate
  • Plasma
  • Porous gold
  • Supercapacitors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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