Electrochemical behavior of nanostructured nickel phthalocyanine (NiPc/C) for oxygen reduction reaction in alkaline media

Download
  1. Get@NRC: Electrochemical behavior of nanostructured nickel phthalocyanine (NiPc/C) for oxygen reduction reaction in alkaline media (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1007/s10800-012-0503-4
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Applied Electrochemistry
ISSN0021-891X
Volume43
Issue1
Pages4351; # of pages: 9
SubjectActivity enhancement; Alkaline electrolytes; Alkaline media; Catalyst structures; Electrocatalytic activity; Electrochemical behaviors; Electron transfer mechanisms; Half-wave potential; Heat treatment temperature; Heat-treatment effects; Linear sweep voltammetry; Milling procedures; Nano-structured; Nanoparticle catalysts; Nickel phthalocyanines; Number of electrons; Onset potential; Oxygen reduction reaction; Remarkable impact; Rotating disk electrodes; XPS analysis; Catalysts; Cyclic voltammetry; Electrolytes; Electrolytic reduction; Electron transitions; Nitrogen compounds; Photoelectrons; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Synthesis (chemical); Thermogravimetric analysis; Transmission electron microscopy; X ray diffraction; X ray photoelectron spectroscopy; Nickel
AbstractCarbon-supported nickel phthalocyanine (NiPc/C) nanoparticle catalysts have been synthesized by a simple solvent-impregnation and milling procedure, then heat-treated at 600, 700, 800 and 900 °C to optimize their activity for the oxygen reduction reaction (ORR). The electrocatalytic activity and electron transfer mechanism of NiPc/C catalysts were demonstrated in oxygen-saturated alkaline electrolyte by cyclic voltammetry, linear sweep voltammetry as well as rotating disk electrode techniques, respectively. The results show that the heat-treatment temperature has a remarkable impact on the ORR activity of NiPc/C. An onset potential of 0.05 V and a half-wave potential of -0.15 V are achieved in 0.1 M KOH after the catalyst was heat-treated at 800 °C. In addition to an increase in ORR kinetics, the number of electrons transferred for ORR also increased from 2.2 to 2.8 with increasing heat-treatment temperature from 600 to 800 °C. To understand the heat-treatment effect, X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy (XPS) were used to identify the catalyst structure and composition. From XPS analysis, pyridinic-N and graphitic-N were clearly observed after the sample was heat-treated at 800 °C. Both of these species might be assigned to sites catalytically active toward the ORR leading to activity enhancement. © 2012 Springer Science+Business Media Dordrecht.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Fuel Cell Innovation (IFCI-IIPC)
Peer reviewedYes
NPARC number21269892
Export citationExport as RIS
Report a correctionReport a correction
Record identifierdd38680b-30b2-4efb-b0e0-320f762789fa
Record created2013-12-13
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)