Multifunctional Nanochemistry: Ambient,Electroless, Template-Based Synthesis and Characterization of Segmented Bimetallic Pd/Au and Pd/Pt Nanowires as High-Performance Electrocatalysts and Nanomotors |
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Authors: | Christopher Koenigsmann Zhibo Tan Huiqing Peng Eli Sutter Jared Jacobskind Stanislaus S. Wong |
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Affiliation: | 1. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400 (USA) These authors contributed equally to this work.;2. Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400 (USA);3. Center for Functional Nanomaterials, Brookhaven National Laboratory, Building 735, Upton, NY 11973 (USA) |
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Abstract: | Segmented noble-metal nanowires (NWs) represent an exciting, multifunctional, one-dimensional, structural architecture with a variety of potential applications. However, the widespread use of electrodeposition in the preparation of these systems has limited their potential to be produced on a large scale, since this protocol is costly and requires complex processes and caustic reaction media. Given the inherent limitations of electrodeposition, we report, for the first time, an ambient, surfactantless, template-based approach that is not only sustainable but also efficient for the reliable production of Pd/Pt and Pd/Au segmented NWs, possessing two spatially separated, chemically distinctive, but elementally pure, axial subunits. Our simple two-step synthetic approach allows for direct and predictable control over the relative segment lengths in these nanomaterials. Moreover, thorough structural characterization of these as-prepared samples confirms that our segmented NWs maintain high-quality, crystalline, elementally pure subunits with a well-defined interface between the constituent metals. In the context of preparing segmented NWs as multifunctional nanostructures, we demonstrate that these as-prepared NWs achieve high levels of performance when employed as both electrocatalysts and nanomotors. |
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Keywords: | nanostructures noble metals oxygen reduction reaction segmented nanowires template synthesis |
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