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Particle Size Control of Pd/C for Improved Electrocatalytic Activity in a Formic Acid Oxidation

Title
Particle Size Control of Pd/C for Improved Electrocatalytic Activity in a Formic Acid Oxidation
Authors
Woo, S[Woo, Seunghee]Kim, I[Kim, In]Bong, S[Bong, Sungyool]Lee, J[Lee, Jaeyoung]Kim, H[Kim, Hasuck]
DGIST Authors
Kim, H[Kim, Hasuck]
Issue Date
2011-08
Citation
Journal of Nanoscience and Nanotechnology, 11(8), 7412-7415
Type
Article
Article Type
Article; Proceedings Paper
Keywords
AgglomerationAqueous ImpregnationCarbonCarbon SupportCarbon SurfaceCatalyst ActivityCyclic VoltammogramsElectrocatalystsElectrocatalytic ActivityElectrochemical Active Surface AreasFormic AcidFormic Acid OxidationImpregnationImproved Aqueous Impregnation MethodMean Particle DiameterNarrow Size DistributionsOptimal SolutionsOxidationParticle Size ControlPd ElectrocatalystPd ParticlePd/C CatalystpH EffectsSolution pHTEM AnalysisUniform DispersionsZeta Potential
ISSN
1533-4880
Abstract
Carbon-supported Pd electrocatalyst is prepared by an improved aqueous impregnation method applying a reducing agent of HCHO and an acidic sedimentation promoter of HCl. We investigate the effect of a solution pH on the zeta potential of both Pd particles and carbon support. The opposite sign of zeta potential results in uniform dispersion of Pd on carbon surface without aggregation problem. TEM analysis shows that optimal solution pH of 4.27 adjusted by NaOH provides a mean particle diameter of 3.2 nm with narrow size distribution. Cyclic voltammograms indicate that home-made Pd/C catalyst exhibits significantly higher electrochemical active surface area and better stability compared with commercial 40 wt.% Pd/C in a formic acid oxidation. © 2011 American Scientific Publishers.
URI
http://hdl.handle.net/20.500.11750/3439
DOI
10.1166/jnn.2011.4829
Publisher
American Scientific Publishers
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringETC1. Journal Articles


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