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Three‐Dimensional Branched and Faceted Gold–Ruthenium Nanoparticles: Using Nanostructure to Improve Stability in Oxygen Evolution Electrocatalysis
Author(s) -
Gloag Lucy,
Benedetti Tania M.,
Cheong Soshan,
Li Yibing,
Chan XuanHao,
Lacroix LiseMarie,
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.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201806300
Subject(s) - electrocatalyst , ruthenium , nanoparticle , oxygen evolution , catalysis , nanostructure , materials science , nanotechnology , chemical engineering , oxygen , hexagonal crystal system , chemistry , electrochemistry , electrode , crystallography , organic chemistry , engineering
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.