Journal
SMALL
Volume 15, Issue 17, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201804577
Keywords
crystallinity; electrocatalysis; nanoparticles; oxygen evolution reaction; ruthenium
Categories
Funding
- University of New South Wales
- Australian Government Research Training Program Scholarship
- UNSW Scientia PhD Scholarship Scheme
- Australian Research Council Linkage grant [LP150101014]
- Australian Research Council ustralian Research Council [FT150100060, DP190102659]
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA-0003525]
Ask authors/readers for more resources
Branched nanoparticles are one of the most promising nanoparticle catalysts as their branch sizes and surfaces can be tuned to enable both high activity and stability. Understanding how the crystallinity and surface facets of branched nanoparticles affect their catalytic performance is vital for further catalyst development. In this work, a synthesis is developed to form highly branched ruthenium (Ru) nanoparticles with control of crystallinity. It is shown that faceted Ru branched nanoparticles have improved stability and activity in the oxygen evolution reaction (OER) compared with polycrystalline Ru nanoparticles. This work achieves a low 180 mV overpotential at 10 mA cm(-2) for hours, demonstrating that record-high stability for Ru nanocrystals can be achieved while retaining high activity for OER. The superior electrocatalytic performance of faceted Ru branched nanoparticles is ascribed to the lower Ru dissolution rate under OER conditions due to low-index facets on the branch surfaces.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available