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dc.contributor.authorIqbal, M.en_US
dc.contributor.authorLi C.en_US
dc.contributor.authorWood, K.en_US
dc.contributor.authorJiang B.en_US
dc.contributor.authorTakei, T.en_US
dc.contributor.authorDag, Ö.en_US
dc.contributor.authorBaba, D.en_US
dc.contributor.authorNugraha, A. S.en_US
dc.contributor.authorAsahi, T.en_US
dc.contributor.authorWhitten, A. E.en_US
dc.contributor.authorHossain, M. S. A.en_US
dc.contributor.authorMalgras, V.en_US
dc.contributor.authorYamauchi, Y.en_US
dc.date.accessioned2018-04-12T11:09:21Z
dc.date.available2018-04-12T11:09:21Z
dc.date.issued2017en_US
dc.identifier.issn0897-4756
dc.identifier.urihttp://hdl.handle.net/11693/37304
dc.description.abstractMesoporous metals that combine catalytic activity and high surface area can provide more opportunities for electrochemical applications. Various synthetic methods, including hard and soft templating, have been developed to prepare mesoporous/nanoporous metals. Micelle assembly, typically involved in soft-templates, is flexible and convenient for such purposes. It is, however, difficult to control, and the ordering is significantly destroyed during the metal deposition process, which is detrimental when it comes to designing precisely mesostructured materials. In the present work, mesoporous Pd films were uniformly electrodeposited using a nonionic surfactant, triblock copolymer poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide), as a pore-directing agent. The interaction between micelles and metal precursors greatly influences the metal growth and determines the final structure. The water-coordinated species interact with the ethylene oxide moiety of the micelles to effectively drive the Pd(II) species toward the working electrode surface. From small-angle neutron scattering data, it is found that spherical P123 micelles, with an average diameter of ∼14 nm, are formed in the electrolyte, and the addition of Pd ions does not significantly modify their structure, which is the essence of the micelle assembly approach. The uniformly sized mesopores are formed over the entire mesoporous Pd film and have an average pore diameter of 10.9 nm. Cross-sectional observation of the film also shows mesopores spanning continuously from the bottom to the top of the film. The crystallinity, crystal phase, and electronic coordination state of the Pd film are also confirmed. Through this study, it is found that the optimized surfactant concentration and applied deposition potential are the key factors to govern the formation of homogeneous and well-distributed pores over the entire film. Interestingly, the as-prepared mesoporous Pd films exhibit superior electrocatalytic activity toward the ethanol oxidation reaction by fully utilizing the accessible active surface area. Our approach combines electrochemistry with colloidal and coordination chemistry and is widely applicable to other promising metals and alloy electrocatalysts.en_US
dc.language.isoEnglishen_US
dc.source.titleChemistry of Materialsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/acs.chemmater.7b01811en_US
dc.subjectCatalyst activityen_US
dc.subjectCoordination reactionsen_US
dc.subjectDepositionen_US
dc.subjectDigital storageen_US
dc.subjectElectrocatalystsen_US
dc.subjectElectrochemistryen_US
dc.subjectElectrodepositionen_US
dc.subjectElectrodesen_US
dc.subjectElectrolytesen_US
dc.subjectEthyleneen_US
dc.subjectMesoporous materialsen_US
dc.subjectMetalsen_US
dc.subjectMicellesen_US
dc.subjectNeutron scatteringen_US
dc.subjectNonionic surfactantsen_US
dc.subjectOxide filmsen_US
dc.subjectPalladium compoundsen_US
dc.subjectPolyethylene oxidesen_US
dc.subjectReductionen_US
dc.subjectSurface active agentsen_US
dc.subjectSynthetic metalsen_US
dc.subjectCo-ordination chemistriesen_US
dc.subjectCross-sectional observationsen_US
dc.subjectElectrocatalytic activityen_US
dc.subjectElectrochemical applicationsen_US
dc.subjectElectrochemical depositionen_US
dc.subjectEthanol oxidation reactionen_US
dc.subjectMesostructured materialsen_US
dc.subjectSurfactant concentrationsen_US
dc.subjectPalladiumen_US
dc.titleContinuous mesoporous pd films by electrochemical deposition in nonionic micellar solutionen_US
dc.typeArticleen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.citation.spage6405en_US
dc.citation.epage6413en_US
dc.citation.volumeNumber29en_US
dc.citation.issueNumber15en_US
dc.identifier.doi10.1021/acs.chemmater.7b01811en_US
dc.publisherAmerican Chemical Societyen_US


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