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Microstructure, morphology and electrochemical properties of Co nanoflake water oxidation electrocatalyst at micro- and nanoscale

Naseri, N ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1039/c6ra28795f
  3. Publisher: Royal Society of Chemistry , 2017
  4. Abstract:
  5. Nowadays, fossil fuel limitations and environmental concerns push researchers to find clean and renewable energy resources. Solar hydrogen production via water splitting reactions in electrochemical and/or photo-electrochemical systems has been accepted as a promising route and efficient electrocatalysts are involved in both. Here, cobalt nanoflakes with an oxide/hydroxide surface and a conductive metallic core are grown on commercially available steel mesh modified with carbon based nanocomposites as a support layer. The portion of reduced graphene oxide sheets was changed from 0 to 100 wt% and the correlation of this concentration with the surface morphology and electro-catalytic activity of the final electrode was studied systematically for the first time. Obtained results revealed the least over potential (224.2 mV) for the sample with 50 wt% rGO in the water splitting reaction which is promising for use in alkaline electrolysis devices. © The Royal Society of Chemistry
  6. Keywords:
  7. Carbon ; Catalyst activity ; Electrocatalysts ; Energy resources ; Fossil fuel deposits ; Fossil fuels ; Graphene ; Metallic compounds ; Renewable energy resources ; Solar power generation ; Alkaline electrolysis ; Electrocatalytic activity ; Electrochemical systems ; Environmental concerns ; Reduced graphene oxides ; Solar Hydrogen Production ; Water oxidation ; Water splitting reactions ; Hydrogen production
  8. Source: RSC Advances ; Volume 7, Issue 21 , 2017 , Pages 12923-12930 ; 20462069 (ISSN)
  9. URL: https://pubs.rsc.org/en/content/articlelanding/2017/ra/c6ra28795f#!divAbstract