Glancing angle deposited Ni nanopillars coated with conformal, thin layers of Pt by a novel electrodeposition: application to the oxygen reduction reaction

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DOIResolve DOI: http://doi.org/10.1016/j.electacta.2014.11.028
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TypeArticle
Journal titleElectrochimica Acta
ISSN0013-4686
Volume151
Pages537543
SubjectNiGLAD{Pt}; platinum; nickel; oxygen reduction; alkaline fuel cell
AbstractGlancing Angle Deposition (GLAD) was used to prepare 500 nm long Ni nanopillars directly on glassy carbon disc electrodes (NiGLAD/GC). NiGLAD{Pt}/GC core-layer nanopillars were prepared by depositing Pt on the NiGLAD substrate via a novel rotating disc electrode galvanostatic deposition, where a stationary blackened Pt counter electrode served as the Pt source. Scanning electron microscopy, cyclic voltammetry, and inductively-coupled mass spectrometry were employed to characterize the deposits. Results indicated that the Pt was deposited in a conformal manner on the NiGLAD giving a loading of 11.6 μg. The NiGLAD{Pt}/GC electrode was ca. three fold more active than a {Pt}/GC (made with the same deposition in the absence of Ni) towards the oxygen reduction reaction (ORR) in 1.0 M KOH. As well, long term potentiostatic ORR studies showed the NiGLAD{Pt}/GC deposit was more durable than the {Pt}/GC, with the former completely retaining its initial performance after 5000 s polarization at 0.85 V vs. RHE, while {Pt}/GC lost 38% of its activity. Subsequent control experiments in the absence of O2 showed that such decay was not due to loss of Pt over the prolonged ORR.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationNational Institute for Nanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number23001459
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Record identifier73d45998-5571-4152-9bb2-3344d25bed81
Record created2017-02-13
Record modified2017-02-13
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