Compositional optimization of alloy FexNiy(OH)2 nanoparticles for alkaline electrochemical oxygen evolution

L. F. Greenlee, P. Acharya, Z. Nelson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Alloy FeNi nanoparticles were synthesized and evaluated as electrocatalysts for the oxygen evolution reaction in alkaline electrolyte. Electron microscopy imaging indicates nanoparticles were formed with a spherical morphology, and initial elemental analysis suggests significant oxygen content in the bimetallic particles. A molar ratio range from 5:1 to 1:5 Fe.Ni in the as-synthesized nanoparticles was tested. The effect of polyvinylpyrrolidone stabilizer on nanoparticle performance was also evaluated. Catalytic performance of the nanoparticles increased with decreasing Fe:Ni molar ratio and PVP:Ni molar ratio. Alloy nanoparticles synthesized with a Fe:Ni ratio of 1:5 and a PVP:Ni ratio of 0.001 resulted in an overpotential of 295 mV at 10 mA/cm2, a Tafel slope of 40 mV/dec, and a mass-based activity of 3343 mA/mg at 1.6 V vs. RHE.

Original languageEnglish (US)
Title of host publicationOxygen or Hydrogen Evolution Catalysis for Water Electrolysis 3
EditorsH. Xu, V. Ramani, P. J. Kulesza
PublisherElectrochemical Society Inc.
Pages25-38
Number of pages14
Edition9
ISBN (Electronic)9781607688129
DOIs
StatePublished - 2017
EventSymposium on Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 3 - 231st ECS Meeting 2017 - New Orleans, United States
Duration: May 28 2017Jun 1 2017

Publication series

NameECS Transactions
Number9
Volume77
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

ConferenceSymposium on Oxygen or Hydrogen Evolution Catalysis for Water Electrolysis 3 - 231st ECS Meeting 2017
Country/TerritoryUnited States
CityNew Orleans
Period5/28/176/1/17

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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