Tailored platinum-nickel nanostructures on zirconia developed by metal casting, internal oxidation and dealloying. (November 2016)

• Record Type: Journal Article
• Authors: Terock, M.; Konrad, C.H.; Popp, R.; Völkl, R.; Yang, F.; McComb, D.W.; Mills, M.J.; Glatzel, U.
• Is Part Of: Corrosion science. Volume 112(2016)
• Page Start: 246
• Page End: 254
• Publication Date: 2016-11
• Subjects: A: Platinum -- A: Zirconium -- B: STEM -- C: Acid-corrosion -- C: Dealloying -- C: Internal oxidation; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2016.06.010
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Hierarchical structure of pores adjustable by metallurgical means. Homogenous distribution of nanostructured Pt-Ni onto the surface of highly porous zirconia support. Initial alloys can be created by a variety of normal metal processing procedures. Flexible new process for manufacturing catalysts, electrodes and sensors. Abstract: Noble-metal nanostructures are crucial, highly active materials in applications such as fuel cells, sensors, electrodes and catalysts. The present work shows a new and efficient method for the in-situ synthesis of platinum-nickel nanostructures on porous zirconia. Ni-Zr-Y metallic alloys with defined Zr/Y-ratios and small amounts of platinum are internally oxidized. An interpenetrating network of yttria-stabilized zirconia (YSZ) in pure nickel is formed. Dealloying of the nickel matrix generates a multimodal porous ceramic support structure with platinum-nickel nanostructures on the surface of the zirconia-ceramic with a broad spectrum for tailored functionality, for example in after-treatment of exhaust gases.