Hydrophobic Nanoreactor Templating allows to easily synthesize different nanostructures, from open porous structures [2] to Metal Nano Particle (NP)@Metal Oxide (MOx) yolk@shell hollow spheres [1, 3]. HNT allows us to control the metallic NP size and number inside the MOx
In this work, we demonstrate that HNT also allows the synthesis of bifunctional catalysts, with two different types of metal NPs in adjacent metal oxide hollow spheres, thereby tuning HNT to a point where we are able to create Metal1@Pore1 and Metal2@Pore2 nanomaterials in a one-pot fashion, which was so far not possible in the field of porous material synthesis.
This achievement is shown by a Proof-of-Concept study, in which we successfully synthesized Au@MOx-Shell1/Pt@MOx-Shell2 in one material. We were able to tune the Au:Pt-ratios and overall material composition. Material formation and properties have been verified by Scanning Transmission Electron Microscopy (STEM), Energy-dispersive X-ray spectroscopy (EDX) and X-ray Diffraction (XRD) as well as cyclovoltammetry, which will be discussed in detail.
[1] A. Guiet, C. Göbel, K. Klingan, M. Lublow, T. Reier, U. Vainio, R. Kraehnert, H. Schlaad, P. Strasser, I. Zaharieva, H. Dau, M. Driess, J. Polte, and A. Fischer, “Hydrophobic Nanoreactor Soft-Templating: A Supramolecular Approach to Yolk@Shell Materials,”
[2] A. Guiet, T. Reier, N. Heidary, D. Felkel, B. Johnson, U. Vainio, Y. Aksu, M. Driess, P. Strasser, A. Thomas, J. Polte, and A. Fischer, “A one-pot approach to mesoporous metal oxide ultrathin film electrodes bearing one metal nanoparticle per pore with enhanced electrocatalytic properties A one-pot approach to mesoporous metal oxide ultrathin film electrodes bearing one metal nanop,”
[3] A. Guiet, T. Unmüssig, C. Göbel, U. Vainio, M. Wollgarten, M. Driess, H. Schlaad, J. Polte, and A. Fischer, “Yolk@Shell Nanoarchitectures with Bimetallic Nanocores-Synthesis and Electrocatalytic Applications,”