Gloag Lucy, Benedetti Tania M, Cheong Soshan, Li Yibing, Chan Xuan-Hao, Lacroix Lise-Marie, Chang Shery L Y, Arenal Raul, Florea Ileana, Barron Hector, Barnard Amanda S, Henning Anna M, Zhao Chuan, Schuhmann Wolfgang, Gooding J Justin, Tilley Richard D
School of Chemistry, University of New South Wales, Sydney, NSW, 2052, Australia.
Electron Microscope Unit, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW, 2052, Australia.
Angew Chem Int Ed Engl. 2018 Aug 6;57(32):10241-10245. doi: 10.1002/anie.201806300. Epub 2018 Jul 15.
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.
利用高活性钌纳米颗粒实现电催化稳定性是析氧反应面临的一项重大挑战。由于已证明低指数晶面的块状表面上钌催化剂的稳定性有所提高，因此有机会将这些稳定的晶面纳入钌纳米颗粒中。现在，提出了一种新的溶液合成方法，其中六方密堆积结构的钌在金上生长，形成具有三维分支的纳米颗粒。在这些三维分支上暴露低指数晶面可产生稳定的反应动力学，以实现高活性以及钌纳米颗粒析氧反应催化剂所观察到的最高稳定性。这些设计原则提供了一种合成策略，以实现稳定且活性高的电催化剂。
