All-metal layer-by-layer films: bimetallic alternate layers with accessible mesopores for enhanced electrocatalysis.

We have prepared multilayer mesoporous bimetallic (Pt/Pd) alternating films by layer-by-layer (LbL) electrochemical deposition. Because of the high surface area and heterometallic interfacial atomic contacts, enhanced electrocatalytic activity for methanol oxidation reaction is realized. This novel LbL approach allows optimization of the electrocatalytic performance through precise tuning of the thickness of each layer.

[1]  Gero Decher,et al.  Fuzzy Nanoassemblies: Toward Layered Polymeric Multicomposites , 1997 .

[2]  K. Schanze,et al.  A Water-Soluble Poly(phenylene ethynylene) with Pendant Phosphonate Groups. Synthesis, Photophysics, and Layer-by-Layer Self-Assembled Films† , 2003 .

[3]  J. Schenkman,et al.  Biochemical applications of ultrathin films of enzymes, polyions and DNA. , 2008, Chemical communications.

[4]  G. Somorjai,et al.  Localized Pd overgrowth on cubic Pt nanocrystals for enhanced electrocatalytic oxidation of formic acid. , 2008, Journal of the American Chemical Society.

[5]  Michael F. Rubner,et al.  pH-Dependent Thickness Behavior of Sequentially Adsorbed Layers of Weak Polyelectrolytes , 2000 .

[6]  Katsuhiko Ariga,et al.  Nanoarchitectonics for mesoporous materials , 2012 .

[7]  J. Carrillo,et al.  Layer-by-layer assembly of charged nanoparticles on porous substrates: molecular dynamics simulations. , 2011, ACS nano.

[8]  V. Torchilin,et al.  Converting poorly soluble materials into stable aqueous nanocolloids. , 2011, Langmuir : the ACS journal of surfaces and colloids.

[9]  P. Hammond.  Form and Function in Multilayer Assembly: New Applications at the Nanoscale , 2004 .

[10]  Alain M. Jonas,et al.  Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties , 2000 .

[11]  Katsuhiko Ariga,et al.  Electrochemical-coupling layer-by-layer (ECC-LbL) assembly. , 2011, Journal of the American Chemical Society.

[12]  V. Tsukruk,et al.  pH-controlled exponential and linear growing modes of layer-by-layer assemblies of star polyelectrolytes. , 2011, Journal of the American Chemical Society.

[13]  Thomas E. Mallouk,et al.  Layer-by-Layer Assembly of Intercalation Compounds and Heterostructures on Surfaces: Toward Molecular "Beaker" Epitaxy , 1994 .

[14]  F. Caruso,et al.  Assembly of ultrathin polymer multilayer films by click chemistry. , 2006, Journal of the American Chemical Society.

[15]  Qiang He,et al.  Molecular assembly and application of biomimetic microcapsules. , 2009, Chemical Society reviews.

[16]  Lifeng Liu,et al.  Nanoporous pt-co alloy nanowires: fabrication, characterization, and electrocatalytic properties. , 2009, Nano letters.

[17]  Ying Wan,et al.  On the controllable soft-templating approach to mesoporous silicates. , 2007, Chemical reviews.

[18]  J. Schlenoff.  Retrospective on the future of polyelectrolyte multilayers. , 2009, Langmuir : the ACS journal of surfaces and colloids.

[19]  H. Möhwald,et al.  Stimuli-responsive LbL capsules and nanoshells for drug delivery. , 2011, Advanced drug delivery reviews.

[20]  Younan Xia,et al.  Metal nanocrystals with highly branched morphologies. , 2011, Angewandte Chemie.

[21]  B. Eichhorn,et al.  Rh-Pt bimetallic catalysts: synthesis, characterization, and catalysis of core-shell, alloy, and monometallic nanoparticles. , 2008, Journal of the American Chemical Society.

[22]  P. Hammond,et al.  Electrochemically erasable hydrogen-bonded thin films. , 2010, Chemical communications.

[23]  T. Mallouk,et al.  Dense layers of vertically oriented WO3 crystals as anodes for photoelectrochemical water oxidation. , 2012, Chemical communications.

[24]  M. Rubner,et al.  Molecular-Level Processing of Conjugated Polymers. 4. Layer-by-Layer Manipulation of Polyaniline via Hydrogen-Bonding Interactions , 1997 .

[25]  Katsuhiko Ariga,et al.  Layer-by-layer assembly as a versatile bottom-up nanofabrication technique for exploratory research and realistic application. , 2007, Physical chemistry chemical physics : PCCP.

[26]  T. Mallouk,et al.  Anodic deposition of colloidal iridium oxide thin films from hexahydroxyiridate(IV) solutions. , 2011, Small.

[27]  Shaojun Dong,et al.  Three-dimensional Pt-on-Pd bimetallic nanodendrites supported on graphene nanosheet: facile synthesis and used as an advanced nanoelectrocatalyst for methanol oxidation. , 2010, ACS nano.

[28]  B. Tieke,et al.  Conjugated Polymer with Benzimidazolylpyridine Ligands in the Side Chain: Metal Ion Coordination and Coordinative Self-Assembly into Fluorescent Ultrathin Films , 2011 .

[29]  Jun Zhang,et al.  Synthesis and oxygen reduction activity of shape-controlled Pt(3)Ni nanopolyhedra. , 2010, Nano letters.

[30]  P. Schaaf,et al.  Polymer multilayer films obtained by electrochemically catalyzed click chemistry. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[31]  Nicholas A Kotov,et al.  Inkjet deposition of layer-by-layer assembled films. , 2010, Journal of the American Chemical Society.

[32]  V. Ball,et al.  Step-by-step assembly of self-patterning polyelectrolyte films violating (almost) all rules of layer-by-layer deposition. , 2010, Journal of the American Chemical Society.

[33]  Hiroshi Kitagawa,et al.  Hydrogen storage mediated by Pd and Pt nanoparticles. , 2009, Chemphyschem : a European journal of chemical physics and physical chemistry.

[34]  Svetlana V. Harbaugh,et al.  Hydrogen-bonded LbL shells for living cell surface engineering , 2011 .

[35]  T. Kunitake,et al.  Stepwise Adsorption of Metal Alkoxides on Hydrolyzed Surfaces: A Surface Sol-Gel Process. , 1996 .

[36]  Ö. Dag,et al.  Fabrication of mesoporous metal chalcogenide nanoflake silica thin films and spongy mesoporous CdS and CdSe. , 2012, Chemistry.

[37]  O. Terasaki,et al.  Synthesis of Mesoporous Pt Films with Tunable Pore Sizes from Aqueous Surfactant Solutions , 2012 .

[38]  T. Mallouk,et al.  Inorganic analogues of Langmuir-Blodgett films: adsorption of ordered zirconium 1,10-decanebisphosphonate multilayers on silicon surfaces , 1988 .

[39]  P. Schaaf,et al.  Spray-on organic/inorganic films: a general method for the formation of functional nano- to microscale coatings. , 2010, Angewandte Chemie.

[40]  M. Mitsuishi,et al.  Preparation of the Layer-by-Layer Deposited Ultrathin Film Based on the Charge-Transfer Interaction , 1997 .

[41]  S. Phanichphant,et al.  Electropolymerization of layer‐by‐layer precursor polymer films , 2011 .

[42]  D. Vautier,et al.  Dynamic Aspects of Films Prepared by a Sequential Deposition of Species: Perspectives for Smart and Responsive Materials , 2011, Advanced materials.

[43]  Y. Yamauchi,et al.  Autoprogrammed synthesis of triple-layered Au@Pd@Pt core-shell nanoparticles consisting of a Au@Pd bimetallic core and nanoporous Pt shell. , 2010, Journal of the American Chemical Society.

[44]  Johannes Schmitt,et al.  Buildup of ultrathin multilayer films by a self-assembly process: III. Consecutively alternating adsorption of anionic and cationic polyelectrolytes on charged surfaces , 1992 .

[45]  F. Caruso,et al.  Next generation, sequentially assembled ultrathin films: beyond electrostatics. , 2007, Chemical Society reviews.