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Three‐Dimensional Branched and Faceted Gold–Ruthenium Nanoparticles: Using Nanostructure to Improve Stability in Oxygen Evolution Electrocatalysis |
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| Authors: | Dr Lucy Gloag Dr Tania M Benedetti Dr Soshan Cheong Dr Yibing Li Dr Xuan‐Hao Chan Prof Lise‐Marie Lacroix Prof Shery L Y Chang Dr Raul Arenal Dr Ileana Florea Dr Hector Barron Dr Amanda S Barnard Dr Anna M Henning Prof Chuan Zhao Prof Wolfgang Schuhmann Prof J Justin Gooding Prof Richard D Tilley |
| Institution: | 1. School of Chemistry, University of New South Wales, Sydney, NSW, Australia;2. Electron Microscope Unit, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW, Australia;3. School of Chemical and Physical Sciences, MacDiarmid Institute for Advanced Materials and Nanotechnology and Boutiq Science Ltd., Victoria University of Wellington, Wellington, New Zealand;4. LPCNO, Université de Toulouse, CNRS, INSA, UPS, Toulouse, France;5. LeRoy Eyring Center for Solid Science, Arizona State University, Tempe, AZ, USA;6. Laboratorio de Microscopias Avanzadas, Instituto de Nanociencia de Aragon and ARAID Fundation, Calle Mariano de Luna, University of Zaragoza, Zaragoza, Spain;7. LPICM, Ecole Polytechnique, Université Paris Saclay CNRS, Palaiseau, France;8. CSIRO Molecular & Materials Modelling, Data61, Docklands, VIC, Australia;9. Analytical Chemistry—Center for Electrochemical Sciences, Ruhr-University Bochum, Bochum, Germany;10. Australian Centre for NanoMedicine, The University of New South Wales, Sydney, NSW, Australia;11. ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of New South Wales, Sydney, NSW, Australia |
| Abstract: | Achieving stability with highly active Ru nanoparticles for electrocatalysis is a major challenge for the oxygen evolution reaction. As improved stability of Ru catalysts has been shown for bulk surfaces with low‐index facets, there is an opportunity to incorporate these stable facets into Ru nanoparticles. Now, a new solution synthesis is presented in which hexagonal close‐packed structured Ru is grown on Au to form nanoparticles with 3D branches. Exposing low‐index facets on these 3D branches creates stable reaction kinetics to achieve high activity and the highest stability observed for Ru nanoparticle oxygen evolution reaction catalysts. These design principles provide a synthetic strategy to achieve stable and active electrocatalysts. |
| Keywords: | bimetallic nanoparticles electrocatalysis nanocrystals oxygen evolution ruthenium |